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Ramos AG. Resistance Training Intensity Prescription Methods Based on Lifting Velocity Monitoring. Int J Sports Med 2024; 45:257-266. [PMID: 37607576 DOI: 10.1055/a-2158-3848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Resistance training intensity is commonly quantified as the load lifted relative to an individual's maximal dynamic strength. This approach, known as percent-based training, necessitates evaluating the one-repetition maximum (1RM) for the core exercises incorporated in a resistance training program. However, a major limitation of rigid percent-based training lies in the demanding nature of directly testing the 1RM from technical, physical, and psychological perspectives. A potential solution that has gained popularity in the last two decades to facilitate the implementation of percent-based training involves the estimation of the 1RM by recording the lifting velocity against submaximal loads. This review examines the three main methods for prescribing relative loads (%1RM) based on lifting velocity monitoring: (i) velocity zones, (ii) generalized load-velocity relationships, and (iii) individualized load-velocity relationships. The article concludes by discussing a number of factors that should be considered for simplifying the testing procedures while maintaining the accuracy of individualized L-V relationships to predict the 1RM and establish the resultant individualized %1RM-velocity relationship: (i) exercise selection, (ii) type of velocity variable, (iii) regression model, (iv) number of loads, (v) location of experimental points on the load-velocity relationship, (vi) minimal velocity threshold, (vii) provision of velocity feedback, and (viii) velocity monitoring device.
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Affiliation(s)
- Amador García Ramos
- Department of Physical Education and Sport, University of Granada, Granada, Spain
- Department of Sports Sciences and Physical Conditioning, Universidad Catolica de la Santisima Concepcion, Concepcion, Chile
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Franco-López F, Pérez-Caballero C, Buendía-Romero Á, Borrego ER, Martínez-Cava A, Pallarés JG, Hernández-Belmonte A. Load-velocity Relationship of the Bench Press Exercise is not Affected by Breast Cancer Surgery and Adjuvant Therapy. Int J Sports Med 2024; 45:110-115. [PMID: 37956877 DOI: 10.1055/a-2184-9078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
We examined the effect of breast cancer surgery and adjuvant therapy on the relationship between bar velocity and relative intensity (load-velocity [L-V] relationship) of the bench press (BP) exercise. Twenty-two breast cancer survivors (age: 48.0±8.2 yr., relative strength: 0.40±0.08) completed a loading test up to the one-repetition maximum (1RM) in the BP using a lightweight carbon bar. General and individual relationships between relative intensity (%1RM) and mean propulsive velocity (MPV) were studied. Furthermore, the mean test velocity (MPVTest) and velocity attained to the 1RM (MPV1RM) were analyzed. These procedures and analyses were also conducted in 22 healthy women (age: 47.8±7.1 yr., relative strength: 0.41±0.09) to examine the differences in velocity parameters derived from these L-V relationships. Polynomial regressions showed very close relationships (R2≥0.965) and reduced estimation errors (≤4.9% 1RM) for both groups. Between-group differences in MPV attained to each %1RM were small (≤0.01 m·s-1) and not significant (p≥0.685). Similarly, the MPVTest (0.59±0.06 m·s-1) and MPV1RM (0.17±0.03 m·s-1) were identical for breast cancer survivors and healthy women. These results suggest that practitioners could use the same velocity parameters derived from the BP L-V relationship to prescribe this exercise in middle-aged women, regardless of whether they have suffered from breast cancer.
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Affiliation(s)
- Francisco Franco-López
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | | | - Ángel Buendía-Romero
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | - Eduardo R Borrego
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | - Alejandro Martínez-Cava
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | - Jesús G Pallarés
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
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Fitas A, Santos P, Gomes M, Pezarat-Correia P, Schoenfeld BJ, Mendonca GV. Prediction of One Repetition Maximum in Free-Weight Back Squat Using a Mixed Approach: The Combination of the Individual Load-Velocity Profile and Generalized Equations. J Strength Cond Res 2024; 38:228-235. [PMID: 38088936 DOI: 10.1519/jsc.0000000000004632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
ABSTRACT Fitas, A, Santos, P, Gomes, M, Pezarat-Correia, P, Schoenfeld, BJ, and Mendonca, GV. Prediction of one repetition maximum in free-weight back squat using a mixed approach: the combination of the individual load-velocity profile and generalized equations. J Strength Cond Res 38(2): 228-235, 2024-We aimed to develop a mixed methods approach for 1 repetition maximum (1RM) prediction based on the development of generalized equations and the individual load-velocity profile (LVP), and to explore the validity of such equations for 1RM prediction. Fifty-seven young men volunteered to participate. The submaximal load-velocity relationship was obtained for the free-weight parallel back squat. The estimated load at 0 velocity (LD0) was used as a single predictor, and in combination with the slope of the individual LVP, to develop equations predictive of 1RM. Prediction accuracy was determined through the mean absolute percent error and Bland-Altman plots. LD0 was predictive of 1RM ( p < 0.0001), explaining 70.2% of its variance. Adding the slope of the LVP to the model increased the prediction power of 1RM to 84.4% ( p < 0.0001). The absolute percent error between actual and predicted 1RM was lower for the predictions combining LD0 and slope (6.9 vs. 9.6%). The mean difference between actual and estimated 1RM was nearly zero and showed heteroscedasticity for the LD0 model, but not for the combined model. The limits of agreement error were of 31.9 and 23.5 kg for LD0 and LD0 combined with slope, respectively. In conclusion, the slope of the individual LVP adds predictive value to LD0 in 1RM estimation on a group level and avoids error trends in the estimation of 1RM over the entire spectrum of muscle strength. However, the use of mixed methods does not reach acceptable accuracy for 1RM prediction of the free-weight back squat on an individual basis.
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Affiliation(s)
- Afonso Fitas
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
| | - Paulo Santos
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Miguel Gomes
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York
| | - Goncalo V Mendonca
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
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Izadi M, Pillitteri G, Thomas E, Battaglia G, Bianco A, Bellafiore M. Sex differences in the determination of prescribed load in ballistic bench press. Front Physiol 2024; 15:1293044. [PMID: 38282756 PMCID: PMC10811050 DOI: 10.3389/fphys.2024.1293044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/03/2024] [Indexed: 01/30/2024] Open
Abstract
Introduction: The objectives of the present study were twofold: first, to identify the specific relative load at which the concentric motion transforms into a purely propulsive action among women, and second, to compare the load-velocity relationships between men and women during the bench press throw. Methods: Fourteen men and fourteen women participated in a test where they progressively increased the load until reaching their one-repetition maximum (1RM) in the bench press exercise. Linear regression models were employed to elucidate the relationships between load and velocity, as well as load and the propulsive phase (% of total concentric time). Additionally, ANCOVA was utilized to compare the linear regression models between men and women. Results: The results revealed strong and linear associations between load and mean propulsive velocity (MPV) for both men and women, as well as between load and the propulsive phase. Notably, there were significant differences in MPV and the propulsive phase concerning load between men and women. Women transitioned into a fully propulsive concentric phase at approximately 80% of their 1RM, while men achieved this entirely propulsive phase at around 85% of their 1RM. Furthermore, women exhibited reduced velocities when handling lighter relative loads compared to men. Conversely, women demonstrated higher velocities when dealing with loads exceeding 85% of their 1RM in contrast to their male counterparts. Discussion: These findings hold notable implications for prescribing bench press throw loads for women, which should differ from those recommended for men. Further studies are necessary to validate the efficacy of the proposed load recommendations.
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Affiliation(s)
- Mohammad Izadi
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy
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Janićijević D, Miras-Moreno S, Morenas-Aguilar MD, Moraga-Maureira E, Weakley J, García-Ramos A. Optimizing mechanical performance in the bench press: The combined influence of inter-set rest periods and proximity to failure. J Sports Sci 2023; 41:2193-2200. [PMID: 38369845 DOI: 10.1080/02640414.2024.2317644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 02/05/2024] [Indexed: 02/20/2024]
Abstract
This study examined the influence of inter-set rest periods of 1 (R1), 3 (R3) and 5 (R5) minutes on the number of repetitions completed before exceeding the minimum velocity thresholds of 0.45 m⋅s-1 (MVT0.45) and 0.35 m⋅s-1 (MVT0.35) during the bench press exercise. Twenty-three physically active individuals, 15 men and eight women, randomly completed six testing sessions consisting of four sets of the bench press exercise performed with maximal intent against 75% of the one-repetition maximum. Testing sessions differed in the length of inter-set rest periods (R1, R3, and R5) and MVT applied (MVT0.45 and MVT0.35). The number of repetitions was lower using shorter inter-set rest periods (R1 < R3 < R5), but R3 was more similar to R1 and R5 using MVT0.45 and MVT0.35, respectively. The fastest velocity of the set was reduced with the increment in the number of sets for the three protocols using MVT0.35 (greater reduction for shorter rest periods), but it was only reduced for R1 when using MVT0.45. The results suggest that, to maintain bench press mechanical performance, 5-min inter-set rest periods are necessary when sets are terminated close to failure (MVT0.35), while 3 min may suffice when sets are terminated farther from failure (MVT0.45).
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Affiliation(s)
- Danica Janićijević
- Research Academy of Human Biomechanics, The affiliated hospital of medical school of Ningbo University, Ningbo University, Ningbo, China
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Sergio Miras-Moreno
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | | | - Enzo Moraga-Maureira
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Jonathon Weakley
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia
- Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK
| | - Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Catolica de la Santísima Concepcion, Concepción, Chile
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Boffey D, DiPrima JA, Kendall KL, Hill EC, Stout JR, Fukuda DH. Influence of Body Composition, Load-Velocity Profiles, and Sex-Related Differences on Army Combat Fitness Test Performance. J Strength Cond Res 2023; 37:2467-2476. [PMID: 38015736 DOI: 10.1519/jsc.0000000000004563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
ABSTRACT Boffey, D, DiPrima, JA, Kendall, KL, Hill, EC, Stout, JR, and Fukuda, DH. Influence of body composition, load-velocity profiles, and sex-related differences on army combat fitness test performance. J Strength Cond Res 37(12): 2467-2476, 2023-The Army Combat Fitness Test (ACFT) became the U.S. Army's mandatory physical fitness test in April of 2022. The purpose of this study was to determine the relationship between ACFT performance and both body composition and velocity profiles and to determine sex differences for these variables. Data were collected at 2 timepoints 4 months apart, from male (n = 55) and female (n = 17) Army Reserve Officers' Training Corps (ROTC) cadets. Body composition was assessed with a bioelectrical impedance spectroscopy device, and cadets completed a hex bar deadlift load-velocity profile (LVP) and ACFT on separate days. Stepwise multiple regressions were used to explain the amount of variance in ACFT total score and individual event performance. Significance for statistical tests was defined as an alpha level of p ≤ 0.05. Muscle mass and body fat percentage accounted for 49% of shared variance of total ACFT score, and deadlift maximal power and maximal velocity accounted for 67% of shared variance of total ACFT score. The 3 repetition maximum deadlift, standing power throw, hand-release push-up, and sprint-drag-carry events favored cadets with more muscle mass, whereas the leg tuck was influenced by the body fat percentage and the 2-mile run was affected by fat mass. Sex had greater predictive capability for the 2-mile run than body composition. Men outperformed women on all individual events, with the greatest differences on standing power throw and sprint-drag-carry. It is recommended that Army ROTC cadets taking the ACFT maximize lower-body power production and increase muscle mass.
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Affiliation(s)
- David Boffey
- Human Performance Laboratory, Department of Health, Human Performance and Recreation, Pittsburg State University, Pittsburg, Kansas
| | - Joseph A DiPrima
- Institute of Exercise Physiology and Rehabilitation Science, College of Health Professions and Sciences, University of Central Florida, Orlando, Florida
| | - Kristina L Kendall
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Western Australia, Australia; and
| | - Ethan C Hill
- Institute of Exercise Physiology and Rehabilitation Science, College of Health Professions and Sciences, University of Central Florida, Orlando, Florida
- Florida Space Institute, Partnership I, Research Parkway, University of Central Florida, Orlando, Florida
| | - Jeffrey R Stout
- Institute of Exercise Physiology and Rehabilitation Science, College of Health Professions and Sciences, University of Central Florida, Orlando, Florida
| | - David H Fukuda
- Institute of Exercise Physiology and Rehabilitation Science, College of Health Professions and Sciences, University of Central Florida, Orlando, Florida
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Nieto-Acevedo R, Romero-Moraleda B, Montalvo-Pérez A, García-Sánchez C, Marquina-Nieto M, Mon-López D. Sex Differences in the Load-Velocity Profiles of Three Different Row Exercises. Sports (Basel) 2023; 11:220. [PMID: 37999437 PMCID: PMC10675667 DOI: 10.3390/sports11110220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/17/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
This study examined the force-velocity profile differences between men and women in three variations of row exercises. Twenty-eight participants (14 men and 14 women) underwent maximum dynamic strength assessments in the free prone bench row (PBR), bent-over barbell row (BBOR), and Smith machine bent-over row (SMBOR) in a randomized order. Subjects performed a progressive loading test from 30 to 100% of 1-RM (repetition maximum), and the mean propulsive velocity was measured in all attempts. Linear regression analyses were conducted to establish the relationships between the different measures of bar velocity and % 1-RM. The ANOVAs applied to the mean velocity achieved in each % 1-RM tested revealed significantly higher velocity values for loads < 65% 1-RM in SMBOR compared to BBOR (p < 0.05) and higher velocities for loads < 90% 1-RM in SMBOR compared to PBR (p < 0.05) for both sexes. Furthermore, men provided significantly higher velocity values than women (PBR 55-100% 1-RM; BBOR and SMBOR < 85% 1-RM; p < 0.05) and significant differences were found between exercises and sex for 30-40% 1-RM. These results confirm that men have higher velocities at different relative loads (i.e., % 1-RM) compared to women during upper-body rowing exercises.
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Affiliation(s)
- Raúl Nieto-Acevedo
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain; (R.N.-A.); (C.G.-S.); (M.M.-N.); (D.M.-L.)
| | - Blanca Romero-Moraleda
- Department of Physical Education, Sport and Human Movement, Autonomous University of Madrid, 28049 Madrid, Spain;
- Applied Biomechanics and Sports Technology Research Group, Autonomous University of Madrid, 28049 Madrid, Spain
| | | | - Carlos García-Sánchez
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain; (R.N.-A.); (C.G.-S.); (M.M.-N.); (D.M.-L.)
| | - Moisés Marquina-Nieto
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain; (R.N.-A.); (C.G.-S.); (M.M.-N.); (D.M.-L.)
| | - Daniel Mon-López
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain; (R.N.-A.); (C.G.-S.); (M.M.-N.); (D.M.-L.)
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Nieto-Acevedo R, Romero-Moraleda B, Díaz-Lara FJ, Rubia ADL, González-García J, Mon-López D. A Systematic Review and Meta-Analysis of the Differences in Mean Propulsive Velocity between Men and Women in Different Exercises. Sports (Basel) 2023; 11:118. [PMID: 37368568 DOI: 10.3390/sports11060118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 05/26/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
The purpose of this paper was to conduct a systematic review and meta-analysis of studies examining the differences in the mean propulsive velocities between men and women in the different exercises studied (squat, bench press, inclined bench press and military press). Quality Assessment and Validity Tool for Correlational Studies was used to assess the methodological quality of the included studies. Six studies of good and excellent methodological quality were included. Our meta-analysis compared men and women at the three most significant loads of the force-velocity profile (30, 70 and 90% of 1RM). A total of six studies were included in the systematic review, with a total sample of 249 participants (136 men and 113 women). The results of the main meta-analysis indicated that the mean propulsive velocity is lower in women than men in 30% of 1RM (ES = 1.30 ± 0.30; CI: 0.99-1.60; p < 0.001) and 70% of 1RM (ES = 0.92 ± 0.29; CI: 0.63, 1.21; p < 0.001). In contrast, for the 90% of the 1RM (ES = 0.27 ± 0.27; CI: 0.00, 0.55), we did not find significant differences (p = 0.05). Our results support the notion that prescription of the training load through the same velocity could cause women to receive different stimuli than men.
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Affiliation(s)
- Raúl Nieto-Acevedo
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain
| | - Blanca Romero-Moraleda
- Department of Physical Education, Sport and Human Movement, Autonomous University of Madrid, 28049 Madrid, Spain
| | - Francisco Javier Díaz-Lara
- Performance and Sport Rehabilitation Laboratory, Faculty of Sports Sciences, University of Castilla-La Mancha, Avda. Carlos III S/N, 45071 Toledo, Spain
| | - Alfonso de la Rubia
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain
| | - Jaime González-García
- Exercise and Sport Sciences, Faculty of Health Science, Universidad Francisco de Vitoria, 28223 Pozuelo, Spain
| | - Daniel Mon-López
- Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Calle Martín Fierro, 7, 28040 Madrid, Spain
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Nieto-Acevedo R, Romero-Moraleda B, Montalvo-Pérez A, Valdés-Álvarez A, García-Sánchez C, Mon-López D. Should We Use the Men Load-Velocity Profile for Women in Deadlift and Hip Thrust? Int J Environ Res Public Health 2023; 20:4888. [PMID: 36981796 PMCID: PMC10048953 DOI: 10.3390/ijerph20064888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Injuries are common in team sports and can impact both team and individual performance. In particular, hamstring strain injuries are some of the most common injuries. Furthermore, hamstring injury ratios, in number of injuries and total absence days, have doubled in the last 21 seasons in professional soccer. Weakness in hip extensor strength has been identified as a risk factor in elite-level sprinters. In addition, strength imbalances of the hamstring muscle group seem to be a common cause of hamstring strain injuries. In this regard, velocity-based training has been proposed to analyze deficits in the force-velocity profile. Previous studies have shown differences between men and women, since there are biomechanical and neuromuscular differences in the lower limbs between sexes. Therefore, the aim of this study was to compare the load-velocity profile between males and females during two of the most important hip extension exercises: the hip thrust and the deadlift. Sixteen men and sixteen women were measured in an incremental loading test following standard procedures for the hip thrust and deadlift exercises. Pearson's correlation (r) was used to measure the strength of the correlation between movement velocity and load (%1RM). The differences in the load-velocity relationship between the men and the women were assessed using a 2 (sex) × 15 (load) repeated-measures ANOVA. The main findings revealed that: (I) the load-velocity relationship was always strong and linear in both exercises (R2 range: 0.88-0.94), (II) men showed higher velocities for light loads (30-50%1RM; effect size: 0.9-0.96) than women for the deadlift, but no significant differences were found for the hip thrust. Based on the results of this study, the load-velocity equations seem to be sex-specific. Therefore, we suggest that using sex-specific equations to analyze deficits in the force-velocity profile would be more effective to control intensity in the deadlift exercise.
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Affiliation(s)
- Raúl Nieto-Acevedo
- Deporte y Entrenamiento Research Group, Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte (INEF), Universidad Politécnica de Madrid, C. de Martín Fierro 7, 28040 Madrid, Spain
| | - Blanca Romero-Moraleda
- Department of Physical Education, Sport and Human Movement, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | | | - Agustín Valdés-Álvarez
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science (INEF), Universidad Politécnica de Madrid (UPM), 28040 Madrid, Spain
| | - Carlos García-Sánchez
- Deporte y Entrenamiento Research Group, Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte (INEF), Universidad Politécnica de Madrid, C. de Martín Fierro 7, 28040 Madrid, Spain
| | - Daniel Mon-López
- Deporte y Entrenamiento Research Group, Departamento de Deportes, Facultad de Ciencias de la Actividad Física y del Deporte (INEF), Universidad Politécnica de Madrid, C. de Martín Fierro 7, 28040 Madrid, Spain
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Mochizuki Y, Saito M, Homma H, Inoguchi T, Naito T, Sakamaki-Sunaga M, Kikuchi N. Does resistance exercise lifting velocity change with different rest intervals? J Sports Med Phys Fitness 2023; 63:402-408. [PMID: 35912892 DOI: 10.23736/s0022-4707.22.14079-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND In this study, we examined the sex difference of the effect of rest intervals on lifting velocity during resistance exercise. METHODS Twenty-two trained subjects (11 men and 11 women) were included. Each protocol consisted of 3 sets of 10 repetitions at 70% of 1- repetition maximum (1RM) with rest intervals of 90 s (R90), 150 s (R150), and 240 s (R240) in a crossover design. The exercise did parallel squats with free weights. The measurement items are lifting velocity (mean velocity) in each repetition and blood lactate concentration after exercise. RESULTS There was a significant interaction between changes in the average velocity of 10 repetition in each set (AV<inf>10rep</inf>) and sex in each protocol, indicating that AV<inf>10rep</inf> during squat exercise has decreased in men but not in women in each protocol (P=0.002-0.03). CONCLUSIONS Our results suggested that short rest intervals will not recover lifting velocity between short rest intervals until the next set at men, while women will be able to recover even with short rest intervals.
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Affiliation(s)
- Yukina Mochizuki
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Mika Saito
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Hiroki Homma
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Takamichi Inoguchi
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Takuto Naito
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Mikako Sakamaki-Sunaga
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Naoki Kikuchi
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan -
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11
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Nuzzo JL. Narrative Review of Sex Differences in Muscle Strength, Endurance, Activation, Size, Fiber Type, and Strength Training Participation Rates, Preferences, Motivations, Injuries, and Neuromuscular Adaptations. J Strength Cond Res 2023; 37:494-536. [PMID: 36696264 DOI: 10.1519/jsc.0000000000004329] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
ABSTRACT Nuzzo, JL. Narrative review of sex differences in muscle strength, endurance, activation, size, fiber type, and strength training participation rates, preferences, motivations, injuries, and neuromuscular adaptations. J Strength Cond Res 37(2): 494-536, 2023-Biological sex and its relation with exercise participation and sports performance continue to be discussed. Here, the purpose was to inform such discussions by summarizing the literature on sex differences in numerous strength training-related variables and outcomes-muscle strength and endurance, muscle mass and size, muscle fiber type, muscle twitch forces, and voluntary activation; strength training participation rates, motivations, preferences, and practices; and injuries and changes in muscle size and strength with strength training. Male subjects become notably stronger than female subjects around age 15 years. In adults, sex differences in strength are more pronounced in upper-body than lower-body muscles and in concentric than eccentric contractions. Greater male than female strength is not because of higher voluntary activation but to greater muscle mass and type II fiber areas. Men participate in strength training more frequently than women. Men are motivated more by challenge, competition, social recognition, and a desire to increase muscle size and strength. Men also have greater preference for competitive, high-intensity, and upper-body exercise. Women are motivated more by improved attractiveness, muscle "toning," and body mass management. Women have greater preference for supervised and lower-body exercise. Intrasexual competition, mate selection, and the drive for muscularity are likely fundamental causes of exercise behaviors in men and women. Men and women increase muscle size and strength after weeks of strength training, but women experience greater relative strength improvements depending on age and muscle group. Men exhibit higher strength training injury rates. No sex difference exists in strength loss and muscle soreness after muscle-damaging exercise.
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Affiliation(s)
- James L Nuzzo
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
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12
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Rebelo A, Pereira J, Martinho D, Valente-dos-santos J. Effects of a Velocity-Based Complex Training Program in Young Female Artistic Roller Skating Athletes. J Hum Kinet 2023; 86:217-234. [PMID: 37181267 PMCID: PMC10170548 DOI: 10.5114/jhk/159654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Complex training consists of a near maximal strength effort followed by a biomechanically similar explosive exercise. One of many complex training methods that have been proposed is the French Contrast Method. The aim of this study was to analyze the effects of the French Contrast Method on maximal strength and power of young female artistic roller skating athletes with the help of velocity-based training to prescribe the intervention program. Eighteen female artistic roller skating athletes, divided into an experimental group (EG) and a control group (CG), participated in this study. The EG performed complex training via the French Contrast Method. The CG did not perform any additional training besides their regular roller skating practices. All participants were tested on the 1-RM back squat and hip thrust, the load-velocity profile assessment of both exercises previously stated, the countermovement jump, and the drop jump. A significant increase in mean concentric velocity (MCV) of the hip thrust exercise from 10 to 60% of 1-RM in the EG was observed. Significant differences between groups were observed for the MCV of the hip thrust from 10 to 90% of 1-RM. There were also significant increases in the 1-RM back squat and 1-RM hip thrust over time in the EG. For the vertical jump variables, there were significant differences between groups for both contact time and the reactive strength index with and without an arm swing. The results of this study suggest that a 6-week training intervention with the use of the French Contrast Method can
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Marques DL, Neiva HP, Marinho DA, Pires IM, Nunes C, Marques MC. Estimating the relative load from movement velocity in the seated chest press exercise in older adults. PLoS One 2023; 18:e0285386. [PMID: 37141287 PMCID: PMC10159201 DOI: 10.1371/journal.pone.0285386] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 04/20/2023] [Indexed: 05/05/2023] Open
Abstract
AIM This study aimed to i) determine the load-velocity relationship in the seated chest press in older adults, ii) compare the magnitude of the relationship between peak and mean velocity with the relative load, and iii) analyze the differences between sexes in movement velocity for each relative load in the chest press. MATERIAL AND METHODS Thirty-two older adults (17 women and 15 men; 79.6±7.7 years) performed a chest press progressive loading test up to the one-repetition maximum (1RM). The fastest peak and mean velocity reached with each weight were analyzed. Quadratic equations were developed for both sexes and the effectiveness of the regression model was analyzed through a residual analysis. The equations were cross-validated, considering the holdout method. The independent samples t-test analyzed i) the differences in the magnitude of the relationship between peak and mean velocity with the relative load and ii) the differences between sexes in the peak and mean velocity for each relative load. RESULTS It was possible to observe very strong quadratic load-velocity relationships in the seated chest press in women (peak velocity: r2 = 0.97, standard error of the estimate (SEE) = 4.5% 1RM; mean velocity: r2 = 0.96, SEE = 5.3% 1RM) and men (peak velocity: r2 = 0.98, SEE = 3.8% 1RM; mean velocity: r2 = 0.98, SEE = 3.8% 1RM) without differences (p>0.05) in the magnitude of the relationship between peak and mean velocity with the relative load. Furthermore, there was no overfitting in the regression models due to the high and positive correlation coefficients (r = 0.98-0.99). Finally, men presented higher (p<0.001) lifting velocities than women in almost all relative loads, except for 95-100% 1RM (p>0.05). CONCLUSION Measuring repetition velocity during the seated chest press is an objective approach to estimating the relative load in older adults. Furthermore, given the velocity differences between older women and men at submaximal loads, it is recommended to use sex-specific equations to estimate and prescribe the relative loads in older adults.
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Affiliation(s)
- Diogo Luís Marques
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
| | - Henrique Pereira Neiva
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
- Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), Covilhã, Portugal
| | - Daniel Almeida Marinho
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
- Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), Covilhã, Portugal
| | - Ivan Miguel Pires
- Instituto de Telecomunicações, Universidade da Beira Interior, Covilhã, Portugal
| | - Célia Nunes
- Department of Mathematics, University of Beira Interior, Covilhã, Portugal
- Centre of Mathematics and Applications, University of Beira Interior, Covilhã, Portugal
| | - Mário Cardoso Marques
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
- Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), Covilhã, Portugal
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Abuajwa B, Hamlin M, Hafiz E, Razman R. The effect of high and low velocity-based training on the throwing performance of collegiate handball players. PeerJ 2022; 10:e14049. [PMID: 36193438 PMCID: PMC9526411 DOI: 10.7717/peerj.14049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/22/2022] [Indexed: 01/21/2023] Open
Abstract
Background The intensity of strength training exercise is generally regarded to be the most essential element in developing muscle strength and power. The exercise intensity of strength training is known as one-repetition maximum (1RM). Velocity-based training (VBT) has been proposed as a different approach for determining training intensity. VBT relies on the use of linear position transducers and inertial measurement units, providing real-time feedback to objectively adjust the exercise intensity based on an athlete's velocity zone. Methods This study investigated the effects of two different training interventions based on individualized load velocity profiles (LVP) on maximal bench press strength (i.e., 1RM), maximum throwing velocity (TV), and skeletal muscle mass (SKMM). Twenty-two university handball players were randomly assigned to Group 1 (low-movement speed training) or Group 2 (high-movement speed training). Group 1 exercised with a bar speed of 0.75-0.96 m/s, which corresponds to a resistance of approximately 60% 1RM, whereas Group 2 trained at 1.03-1.20 m/s, corresponding to a resistance of approximately 40% 1RM. Both groups exercised three times a week for five weeks, with strength and throwing tests performed at baseline and post-intervention. Results A two-way repeated measures ANOVA was applied, and the results showed the interaction between group and time was not statistically significant for SKMM (p = 0.537), 1RM (p = 0.883), or TV (p = 0.774). However, both groups significantly improved after the five weeks of training: SKMM (3.1% and 3.5%, p < 0.01), 1RM (15.5% and 15.0%, p < 0.01), and throwing velocity (18.7% and 18.3%, p < 0.01) in Group 1 and 2 respectively. Training at both prescribed velocities in this study elicited similar changes in strength, muscle mass, and throwing velocity.
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Affiliation(s)
- Bassam Abuajwa
- Centre for Sport & Exercise Sciences, University of Malaya, Kuala Lumpur, Kuala Lumpur, Malaysia
| | - Mike Hamlin
- Department of Tourism, Sport and Society, Lincoln University, Christchurch, Canterbury, New Zealand
| | - Eliza Hafiz
- Centre for Sport & Exercise Sciences, University of Malaya, Kuala Lumpur, Kuala Lumpur, Malaysia
| | - Rizal Razman
- Centre for Sport & Exercise Sciences, University of Malaya, Kuala Lumpur, Kuala Lumpur, Malaysia
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Martín-fuentes I, Oliva-lozano J, Muyor J. Evaluation of load-velocity relationships in the inclined leg press exercise: A comparison between genders. Sci Sports 2022; 37:320.e1-320.e9. [DOI: 10.1016/j.scispo.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fernandez Ortega JA, Mendoza Romero D, Sarmento H, Prieto Mondragón L. Bar Load-Velocity Profile of Full Squat and Bench Press Exercises in Young Recreational Athletes. Int J Environ Res Public Health 2022; 19:ijerph19116756. [PMID: 35682339 PMCID: PMC9180020 DOI: 10.3390/ijerph19116756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 11/21/2022]
Abstract
The purpose of this study was to determine the mean propulsive velocity (MVP) at various percentages of one repetition maximum (1RM) in the full squat and chest press exercises. A total of 96 young women and 256 young men (recreational athletes) performed an incremental test (50−60−70−80% 1RM) comprising the bench press and full squat exercises in two different sessions. The individual load and velocity ratios were established through the MPV. Data were analyzed using SPSS software version 25.0, with the significance level set at 5%. The following findings were revealed: highly linear load-velocity relationships in the group of women (r = 0.806 in the squat, and r = 0.872 in the bench press) and in the group of men (r = 0.832 and r = 0.880, respectively); significant differences (p < 0.001) in the MPV at 50−70−80% 1RM between the bench press and the full squat in men and at 70−80% 1RM in women; and a high variability in the MPV (11.49% to 22.63) in the bench press and full squat (11.58% to 25.15%) was observed in women and men (11.31% to 21.06%, and 9.26% to 24.2%) at the different percentages of 1RM evaluated. These results suggest that the load-velocity ratio in non-strength-trained subjects should be determined individually to more precisely establish the relative load to be used in a full squat and bench press training program.
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Affiliation(s)
- Jairo Alejandro Fernandez Ortega
- Faculty of Health Sciences, University of Applied and Environmental Sciences, Street 222 #55-37, Bogotá 111166, Colombia;
- Laboratory of Exercise Physiology, Faculty of Physical Education, National Pedagogical University, Street 7 #11-86, Bogotá 480100, Colombia
- Correspondence: or ; Tel.: +57-3002079453
| | - Dario Mendoza Romero
- Universidad Santo Tomas, North Highway 205 Street, Via Arrayanes km 1.6, Bogotá 110141, Colombia;
| | - Hugo Sarmento
- University of Coimbra, Research Unit for Sport and Physical Activity (CIDAF), Faculty of Sport Sciences and Physical Education, 3004-531 Coimbra, Portugal;
| | - Laura Prieto Mondragón
- Faculty of Health Sciences, University of Applied and Environmental Sciences, Street 222 #55-37, Bogotá 111166, Colombia;
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Rissanen J, Walker S, Pareja-Blanco F, Häkkinen K. Velocity-based resistance training: do women need greater velocity loss to maximize adaptations? Eur J Appl Physiol 2022; 122:1269-1280. [PMID: 35258681 PMCID: PMC9012837 DOI: 10.1007/s00421-022-04925-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 02/19/2022] [Indexed: 11/26/2022]
Abstract
Purpose Men and women typically display different neuromuscular characteristics, force–velocity relationships, and differing strength deficit (upper vs. lower body). Thus, it is not clear how previous recommendations for training with velocity-loss resistance training based on data in men will apply to women. This study examined the inter-sex differences in neuromuscular adaptations using 20% and 40% velocity-loss protocols in back squat and bench press exercises. Methods The present study employed an 8-week intervention (2 × week) comparing 20% vs. 40% velocity-loss resistance training in the back squat and bench press exercises in young men and women (~ 26 years). Maximum strength (1-RM) and submaximal-load mean propulsive velocity (MPV) for low- and high-velocity lifts in squat and bench press, countermovement jump and vastus lateralis cross-sectional area were measured at pre-, mid-, and post-training. Surface EMG of quadriceps measured muscle activity during performance tests. Results All groups increased 1-RM strength in squat and bench press exercises, as well as MPV using submaximal loads and countermovement jump height (P < 0.05). No statistically significant between-group differences were observed, but higher magnitudes following 40% velocity loss in 1-RM (g = 0.60) and in low- (g = 1.42) and high-velocity (g = 0.98) lifts occurred in women. Training-induced improvements were accompanied by increases in surface EMG amplitude and vastus lateralis cross-sectional area. Conclusion Similar increases in strength and power performance were observed in men and women over 8 weeks of velocity-based resistance training. However, some results suggest that strength and power gains favor using 40% rather than 20% velocity loss in women.
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Affiliation(s)
- J Rissanen
- NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Room VIV225, 40014, Jyväskylä, Finland
| | - S Walker
- NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Room VIV225, 40014, Jyväskylä, Finland.
| | - F Pareja-Blanco
- Department of Sports and Computer Sciences, Physical Performance and Sports Research Center, Universidad Pablo de Olavide, Seville, Spain
| | - K Häkkinen
- NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Room VIV225, 40014, Jyväskylä, Finland
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Çetin O, Akyildiz Z, Demirtaş B, Sungur Y, Clemente FM, Cazan F, Ardigò LP. Reliability and validity of the multi-point method and the 2-point method's variations of estimating the one-repetition maximum for deadlift and back squat exercises. PeerJ 2022; 10:e13013. [PMID: 35256919 PMCID: PMC8898007 DOI: 10.7717/peerj.13013] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/04/2022] [Indexed: 01/11/2023] Open
Abstract
This study aimed at examining the concurrent validity and reliability of the multi-point method and the two-point method's variations for estimating the one-repetition maximum (1RM) in the deadlift and squat exercises and to determine the accuracy of which optimal two loads can be used for the two-point method protocol. Thirteen resistance-trained men performed six sessions that consisted of two incremental loading tests (multi-point method: 20-40-60-80-90% and two-point method variations: 40-60%, 40-80%, 40-90%,60-80%, 60-90%) followed by 1RM tests. Both the multi-point method and the two-point method load variations showed reliable results for 1RM estimation (CV < 10%) squat and deadlift exercises. Session-session reliability was found to be low in deadlift (ICC: 0.171-0.335) and squat exercises (ICC: 0.235-0.479) of 40-60% and 60-80% in two-point methods. Deadlift (ICC: 0.815-0.996) and squat (ICC: 0.817-0.988) had high session-to-session reliability in all other methods. Regarding the validity of deadlift exercise, the multipoint method (R2 = 0.864) and two variations of the two-point method (R2 = 0.816 for 40-80%, R2 = 0.732 for 60-80%) showed very large correlations, whereas other two variations of the two-point method (R2 = 0.945 for 40-90%, R2 = 0.914 for 60-90%) showed almost perfect correlations with the actual 1RM. Regarding the validity of squat exercise, the multi-point method (R2 = 0.773) and two variations of the two-point method (R2 = 0.0847 for 60-80%, R2 = 0.705 for 40-90%) showed very large correlations, whereas 40-60% variation showed almost perfect correlation (R2 = 0.962) with the actual 1RM. In conclusion, whereas both the multi-point method and the two-point method load variations showed reliable results, the multiple-point method and most of the two-point methods' load variations examined in this research provided an accurate (from large-moderate to perfect) estimate of the 1RM. Therefore, we recommend using the multi-point method and especially the two-point methods variations including higher relative loads to estimate 1RM.
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Affiliation(s)
- Onat Çetin
- Faculty of Sports Sciences, Department of Coaching Education, Yalova University, Yalova, Turkey
| | - Zeki Akyildiz
- Faculty of Sports Sciences, Gazi University, Ankara, Turkey
| | - Barbaros Demirtaş
- Movement and Training Sciences Department, Sports Sciences Faculty, Sakarya Applied Sciences University, Sakarya, Turkey
| | - Yılmaz Sungur
- Department of Movement and Training Science, Faculty of Sports Sciences, Akdeniz University, Antalya, Turkey,Sports Medicine and Athletic Performance Department, Gloria Sports Arena, Antalya, Turkey
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal,Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, Portugal,Instituto de Telecomunicações, Delegação da Covilhã, Lisboa, Portugal
| | - Florin Cazan
- Faculty of Physical Education and Sport, Ovidius University of Constanta, Constanta, Romania
| | - Luca Paolo Ardigò
- Department of Neurosciences, Biomedicine and Movement Sciences, School of Exercise and Sport Science, University of Verona, Verona, Italy
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Santos AC, Turner TJ, Bycura DK. Current and Future Trends in Strength and Conditioning for Female Athletes. Int J Environ Res Public Health 2022; 19:ijerph19052687. [PMID: 35270378 PMCID: PMC8909798 DOI: 10.3390/ijerph19052687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/11/2022] [Accepted: 02/22/2022] [Indexed: 12/04/2022]
Abstract
Participation by female athletes in competitive sport has increased dramatically since the inception of Title IX, although female athletes are represented significantly less than their male counterparts in strength and conditioning (S&C) literature. This is apparent when examining current identified trends in the field, such as implementation of blood flow restriction (BFR) training, functional assessments to predict injuries, or the ever-increasing use of technology in sports. The aim of this review is to examine three prevalent trends in contemporary S&C literature as they relate to female athletes in order to expose areas lacking in research. We conducted journal and database searches to progressively deepen our examination of available research, starting first with broad emerging themes within S&C, followed next by an inquiry into literature concerning S&C practices in females, ending finally with a review of emerging topics concerning female athletes. To this end, 534 articles were reviewed from PubMed, Academic Search Complete, Google Scholar, CINAHL, MEDLINE, and Web of Science. Results demonstrate the utility of implementing BFR, functional movement assessments, and various technologies among this population to expand representation of female athletes in S&C literature, improve athletic capabilities and performance, and decrease potential for injury over time.
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Pérez-Castilla A, Jukic I, Janicijevic D, Akyildiz Z, Senturk D, García-Ramos A. Load-Velocity Relationship Variables to Assess the Maximal Neuromuscular Capacities During the Back-Squat Exercise. Sports Health 2022; 14:885-893. [PMID: 35114871 PMCID: PMC9631046 DOI: 10.1177/19417381211064603] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The relationship between the external load lifted and movement velocity can be modeled by a simple linear regression, and the variables derived from the load-velocity (L-V) relationship were recently used to estimate the maximal neuromuscular capacities during 2 variants of the back-squat exercise. HYPOTHESIS The L-V relationship variables will be highly reliable and will be highly associated with the traditional tests commonly used to evaluate the maximal force and power. STUDY DESIGN Twenty-four male wrestlers performed 5 testing sessions (a 1-repetition maximum [1RM] session, and 4 experimental sessions [2 with the concentric-only back-squat and 2 with the eccentric-concentric back-squat]). Each experimental session consisted of performing 3 repetitions against 5 loads (45%-55%-65%-75%-85% of the 1RM), followed by single 1RM attempts. LEVEL OF EVIDENCE Level 3. METHODS Individual L-V relationships were modeled from the mean velocity collected under all loading conditions from which the following 3 variables were calculated: load-axis intercept (L0), velocity-axis intercept (v0), and area under the line (Aline = L0·v0/2). The back-squat 1RM strength and the maximum power determined as the apex of the power-velocity relationship (Pmax) were also determined as traditional measures of maximal force and power capacities, respectively. RESULTS The between-session reliability was high for the Aline (coefficient of variation [CV] range = 2.58%-4.37%; intraclass correlation coefficient [ICC] range = 0.98-0.99) and generally acceptable for L0 and v0 (CV range = 5.08%-9.01%; ICC range = 0.45-0.96). Regarding the concurrent validity, the correlations were very large between L0 and the 1RM strength (rrange = 0.87-0.88) and nearly perfect between Aline and Pmax (r = 0.98-0.99). CONCLUSION The load-velocity relationship variables can be obtained with a high reliability (L0, v0, and Aline) and validity (L0 and Aline) during the back-squat exercise. CLINICAL RELEVANCE The load-velocity relationship modeling represents a quick and simple procedure to estimate the maximal neuromuscular capacities of lower-body muscles.
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Affiliation(s)
- Alejandro Pérez-Castilla
- Department of Physical Education and
Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Ivan Jukic
- Sport Performance Research Institute
New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
| | - Danica Janicijevic
- University of Belgrade, Faculty of
Sport and Physical Education, The Research Centre, Belgrade, Serbia,Research Academy of Human Biomechanics,
The Affiliated Hospital of Medical School of Ningbo University, Ningbo University,
Ningbo, China,Faculty of Sports Science, Ningbo
University, Ningbo, China
| | - Zeki Akyildiz
- Movement and Training Science
Department, Gazi University, Ankara, Turkey
| | - Deniz Senturk
- Sports Department, School of Physical
Education, Gelişim University, Istanbul, Turkey
| | - Amador García-Ramos
- Department of Physical Education and
Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain,Department of Sports Sciences and
Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima
Concepción, Concepción, Chile,Amador García Ramos,
Department of Physical Education and Sport, Faculty of Sport Sciences,
University of Granada, Ctra. Alfacar, 21, Granada, 18011, Spain (
) (Twitter: @amagr)
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Redlicka J, Zielińska-Nowak E, Lipert A, Miller E. Impact of Moderate Individually Tailored Physical Activity in Multiple Sclerosis Patients with Fatigue on Functional, Cognitive, Emotional State, and Postural Stability. Brain Sci 2021; 11:brainsci11091214. [PMID: 34573235 PMCID: PMC8470948 DOI: 10.3390/brainsci11091214] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 12/22/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic disease, with fatigue syndrome as one of the main symptoms. The aim of this study was to demonstrate that moderate physical activity (MPA) may have a beneficial effect on postural stability, balance, and clinical parameters. The research group consisted of 137 randomized patients hospitalized at the Department of Neurological Rehabilitation, Medical University of Lodz. Finally, 76 patients were qualified who were divided into two groups—high fatigue (HF) and low fatigue (LF). Participants were assessed twice: before and after a 4-week MPA program using: the Expanded Disability Status Scale (EDSS), the Fatigue Severity Scale (FSS), the Mini-Mental State Examination (MMSE), the Montreal Cognitive Assessment (MoCA), the Beck Depression Inventory (BDI), and the Geriatric Depression Scale (GDS), and stabilometric platform tests were performed. Results obtained after the 4-week MPA program showed a positive effect of the MPA with differences between LF and HF groups. The MPA was more effective in MS patients with LF in cognitive functions, functional status, and postural stability but among HF patients in an emotional state, especially in MS patients below 65 years, although in total, both groups benefited from the MPA.
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Affiliation(s)
- Justyna Redlicka
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
| | - Ewa Zielińska-Nowak
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
| | - Anna Lipert
- Department of Sports Medicine, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland;
| | - Elżbieta Miller
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
- Correspondence:
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22
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Díez-Fernández DM, Baena-Raya A, Alcaraz-García C, Rodríguez-Rosell D, Rodríguez-Pérez MA, Soriano-Maldonado A. Improving resistance training prescription through the load-velocity relationship in breast cancer survivors: The case of the leg-press exercise. Eur J Sport Sci 2021; 22:1765-1774. [PMID: 34353234 DOI: 10.1080/17461391.2021.1965220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The aims of this study were: (i) to analyse the load-velocity relationship in the bilateral leg-press exercise in female breast cancer survivors, (ii) to assess whether mean velocity (MV) or peak velocity (PV) show stronger relationship with the relative load, and (iii) to examine whether linear (LA) or polynomic (PA) adjustment predict the velocities associated with each %1RM with greater precision. Twenty-two female breast cancer survivors (age: 50.2 ± 10.8 years, weight: 69.6 ± 15.2 kg, height: 160.51 ± 5.25 cm) completed an incremental load test until 1RM in the bilateral leg-press exercise. The MV and the PV of the concentric phase were measured in each repetition using a linear velocity transducer, and were analysed by regression models using LA and PA. A very close relationship of MV (R2 = 0.924; p < 0.0001; SEE = 0.08m.s-1 by LA, and R² = 0.952; p < 0.0001; SEE = 0.063 m.s-1 by PA) and PV (R² = 0.928; p < 0.0001; SEE = 0.119 m.s-1 by LA and R² = 0.941; p < 0.0001; SEE = 0.108 m.s-1 by PA) with %1RM were observed. The MV of 1RM was 0.24 ± 0.03 m·s-1, whereas the PV at 1RM was 0.60 ± 0.10 m.s-1. A comprehensive analysis of the bilateral leg-press load-velocity relationship in breast cancer survivors is presented. The results suggest that MV is the most recommendable velocity variable to prescribe the relative load during resistance training, and that the PA presents better accuracy to predict velocities associated with each %1RM, although LA is sufficiently valid to use this model as an alternative to the quadratic model. The implications for resistance training in breast cancer are discussed.
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Affiliation(s)
- David M Díez-Fernández
- Department of Education, Faculty of Education Sciences, University of Almería, Almería, Spain.,SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
| | - Andrés Baena-Raya
- Department of Education, Faculty of Education Sciences, University of Almería, Almería, Spain.,SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
| | - Celia Alcaraz-García
- Department of Education, Faculty of Education Sciences, University of Almería, Almería, Spain.,SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
| | - David Rodríguez-Rosell
- Physical Performance & Sports Research Center, Universidad Pablo de Olavide, Seville, Spain.,Department of Sport and Informatics, Universidad Pablo de Olavide, Seville, Spain.,Research, development and innovation (R&D+i) Area, Investigation in Medicine and Sport department, Sevilla Football Club, Seville, Spain
| | - Manuel A Rodríguez-Pérez
- Department of Education, Faculty of Education Sciences, University of Almería, Almería, Spain.,SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
| | - Alberto Soriano-Maldonado
- Department of Education, Faculty of Education Sciences, University of Almería, Almería, Spain.,SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
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23
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McErlain-Naylor SA, Peploe C, Grimley J, Deshpande Y, Felton PJ, King MA. Comparing power hitting kinematics between skilled male and female cricket batters. J Sports Sci 2021; 39:2393-2400. [PMID: 34128451 DOI: 10.1080/02640414.2021.1934289] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Organismic, task, and environmental constraints are known to differ between skilled male and female cricket batters during power hitting tasks. Despite these influences, the techniques used in such tasks have only been investigated in male cricket batters. This study compared power hitting kinematics between 15 male and 15 female batters ranging from university to international standard. General linear models were used to assess the effect of gender on kinematic parameters describing technique, with height and body mass as covariates. Male batters generated greater maximum bat speeds, ball launch speeds, and ball carry distances than female batters on average. Male batters had greater pelvis-thorax separation in the transverse plane at the commencement of the downswing (β = 1.14; p = 0.030) and extended their lead elbows more during the downswing (β = 1.28; p = 0.008) compared to female batters. The hypothesised effect of gender on the magnitude of wrist uncocking during the downswing was not observed (β = -0.14; p = 0.819). The causes of these differences are likely to be multi-factorial, involving aspects relating to the individual players, their history of training experiences and coaching practices, and the task of power hitting in male or female cricket.
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Affiliation(s)
- Stuart A McErlain-Naylor
- School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, UK.,School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Chris Peploe
- School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, UK
| | - James Grimley
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Yash Deshpande
- School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, UK
| | - Paul J Felton
- School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, UK.,School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Mark A King
- School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, UK
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24
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Suchomel TJ, Nimphius S, Bellon CR, Hornsby WG, Stone MH. Training for Muscular Strength: Methods for Monitoring and Adjusting Training Intensity. Sports Med 2021; 51:2051-2066. [PMID: 34101157 DOI: 10.1007/s40279-021-01488-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2021] [Indexed: 01/21/2023]
Abstract
Linear loading, the two-for-two rule, percent of one repetition maximum (1RM), RM zones, rate of perceived exertion (RPE), repetitions in reserve, set-repetition best, autoregulatory progressive resistance exercise (APRE), and velocity-based training (VBT) are all methods of adjusting resistance training intensity. Each method has advantages and disadvantages that strength and conditioning practitioners should be aware of when measuring and monitoring strength characteristics. The linear loading and 2-for-2 methods may be beneficial for novice athletes; however, they may be limited in their capacity to provide athletes with variation and detrimental if used exclusively for long periods of time. The percent of 1RM and RM zone methods may provide athletes with more variation and greater potential for strength-power adaptations; however, they fail to account for daily changes in athlete's performance capabilities. An athlete's daily readiness can be addressed to various extents by both subjective (e.g., RPE, repetitions in reserve, set-repetition best, and APRE) and objective (e.g., VBT) load adjustment methods. Future resistance training monitoring may aim to include a combination of measures that quantify outcome (e.g., velocity, load, time, etc.) with process (e.g., variability, coordination, efficiency, etc.) relevant to the stage of learning or the task being performed. Load adjustment and monitoring methods should be used to supplement and guide the practitioner, quantify what the practitioner 'sees', and provide longitudinal data to assist in reviewing athlete development and providing baselines for the rate of expected development in resistance training when an athlete returns to sport from injury or large training load reductions.
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Affiliation(s)
- Timothy J Suchomel
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, 53186, USA.
| | - Sophia Nimphius
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
| | - Christopher R Bellon
- Department of Health and Human Performance, The Citadel-The Military College of South Carolina, Charleston, SC, 29409, USA
| | - W Guy Hornsby
- Department of Coaching and Teaching Studies, West Virginia University, Morgantown, WV, 26505, USA
| | - Michael H Stone
- Center of Excellence for Sport Science and Coach Education, Department of Exercise and Sport Sciences, East Tennessee State University, Johnson City, TN, 37614, USA
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25
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Alonso-Aubin DA, Picón-Martínez M, Chulvi-Medrano I. Strength and Power Characteristics in National Amateur Rugby Players. Int J Environ Res Public Health 2021; 18:ijerph18115615. [PMID: 34074013 PMCID: PMC8197353 DOI: 10.3390/ijerph18115615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022]
Abstract
Rugby players need muscular strength and power to meet the demands of the sport; therefore, a proper assessment of the performance in rugby players should include both variables. The purpose of this study was to examine the strength and power characteristics (SPC) during the squat (SQ) and bench press (BP) in national amateur rugby players and to analyze gender- and position-related differences. A total of 47 players (30 males and 17 females; age: 25.56 ± 1.14 and 23.16 ± 1.38 years, respectively) participated in the study. The one repetition-maximum (1-RM) and SPC in SQ and BP were obtained using a Smith Machine. Then, subjects performed one set of five repetitions on the SQ and BP against six relative loads (30-40-50-60-70-80% 1-RM) using a linear transducer. Differences between genders were found in 1-RM for maximal power, kilograms lifted at maximal power, maximal power, maximal strength and maximal speed in BP (p < 0.00) and 1-RM, kilograms lifted at maximal power, maximal power, maximal strength and maximal speed in SQ (p < 0.00). Comparisons between variables in SQ and BP present a significant relationship (p < 0.01) in SQ and BP 1-RM with kilograms lifted at maximal power (r = 0.86 and r = 0.84), maximal strength (r = 0.53 and r = 0.92) and maximal power (r = 0.76 and r = 0.93). This study confirms the importance of the SPC assessment for training prescription in rugby amateur players.
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Affiliation(s)
| | | | - Iván Chulvi-Medrano
- UIRFIDE (Sport Performance and Physical Fitness Research Group), Department of Physical and Sports Education, University of Valencia, 46010 Valencia, Spain;
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26
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Marques DL, Neiva HP, Marinho DA, Nunes C, Marques MC. Load-velocity relationship in the horizontal leg-press exercise in older women and men. Exp Gerontol 2021; 151:111391. [PMID: 33984450 DOI: 10.1016/j.exger.2021.111391] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 04/12/2021] [Accepted: 05/01/2021] [Indexed: 11/17/2022]
Abstract
This study analyzed the predictive ability of movement velocity to estimate the relative load (i.e., % of one-repetition maximum [1RM]) during the horizontal leg-press exercise in older women and men. Twenty-four women and fourteen men living in community-dwelling centers volunteered to participate in this study. All participants performed a progressive loading test up to 1RM in the horizontal leg-press. The fastest peak velocity (PV) and mean velocity (MV) attained with each weight were collected for analysis. Linear regression equations were modeled for women and men. We observed very strong linear relationships between both velocity variables and the relative load in the horizontal leg-press in women (PV: r2 = 0.93 and standard error of the estimate (SEE) = 5.96% 1RM; MV: r2 = 0.94 and SEE = 5.59% 1RM) and men (PV: r2 = 0.93 and SEE = 5.96% 1RM; MV: r2 = 0.94 and SEE = 5.97% 1RM). The actual 1RM and the estimated 1RM using both the PV and MV presented trivial differences and very strong relationships (r = 0.98-0.99) in both sexes. Men presented significantly higher (p < 0.001-0.05) estimated PV and MV against all relative loads compared to women (average PV = 0.81 vs. 0.69 m·s-1 and average MV = 0.44 vs. 0.38 m·s-1). Our data suggest that movement velocity accurately estimates the relative load during the horizontal leg-press in older women and men. Coaches and researchers can use the proposed sex-specific regression equations in the horizontal leg-press to implement velocity-monitored resistance training with older adults.
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Affiliation(s)
- Diogo Luís Marques
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
| | - Henrique Pereira Neiva
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal; Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, Covilhã, Portugal
| | - Daniel Almeida Marinho
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal; Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, Covilhã, Portugal
| | - Célia Nunes
- Department of Mathematics, University of Beira Interior, Covilhã, Portugal; Centre of Mathematics and Applications, University of Beira Interior, Covilhã, Portugal
| | - Mário Cardoso Marques
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal; Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, Covilhã, Portugal.
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27
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Balsalobre-Fernández C, Muñoz-López M, Marchante D, García-Ramos A. Repetitions in Reserve and Rate of Perceived Exertion Increase the Prediction Capabilities of the Load-Velocity Relationship. J Strength Cond Res 2021; 35:724-730. [PMID: 30312197 DOI: 10.1519/jsc.0000000000002818] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Balsalobre-Fernández, C, Muñoz-López, M, Marchante, D, and García-Ramos, A. Repetitions in reserve and rate of perceived exertion increase the prediction capabilities of the load-velocity relationship. J Strength Cond Res 35(3): 724-730, 2021-This study aimed to (a) analyze the relationships between relative load (i.e., %1 repetition maximum; 1RM) and movement velocity, repetitions in reserve (RIR) and rate of perceived exertion (RPE) in competitive powerlifters and (b) examine whether a multiple linear regression model with the movement velocity, RIR, and RPE as predictor variables could improve the goodness of fit of the load-velocity relationship. Ten competitive powerlifters performed an incremental loading test (from 50 to 100% 1RM) on the full-squat, hip-thrust, and bench press exercises. Barbell velocity was measured using a linear position transducer, while RIR and RPE were registered immediately after each set. Velocity (r2: 0.747-0.887), RIR (r2: 0.857-0.928), and RPE (r2: 0.908-0.933) were moderately to highly related to relative load. A higher amount of variance of the relative load was explained when the RIR and RPE were added to velocity in a multiple regression model in comparison with the load-velocity relationship (r2: 0.924-0.947). Moreover, it was observed that, in all cases, individual load-velocity, load-RIR, and load-RPE relationships had higher r2 scores than the generalized load-velocity relationship. Incorporating the RIR and RPE as predictors of the relative load along with movement velocity into a multiple linear regression was shown to provide better estimations of the %1RM than using a linear load-velocity relationship.
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Affiliation(s)
- Carlos Balsalobre-Fernández
- Department of Physical Education, Sport and Human Movement, Universidad Autónoma de Madrid, Madrid, Spain.,LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science-INEF, Universidad Politécnica de Madrid, Madrid, Spain.,Department of Research and Development, PowerExplosive Center, Madrid, Spain
| | - Mario Muñoz-López
- Department of Research and Development, PowerExplosive Center, Madrid, Spain
| | - David Marchante
- Department of Research and Development, PowerExplosive Center, Madrid, Spain
| | - Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain; and.,Department of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Catholic University of Most Holy Concepción, Concepción, Chile
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28
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Balsalobre-Fernández C, Torres-Ronda L. The Implementation of Velocity-Based Training Paradigm for Team Sports: Framework, Technologies, Practical Recommendations and Challenges. Sports (Basel) 2021; 9:sports9040047. [PMID: 33808302 PMCID: PMC8066834 DOI: 10.3390/sports9040047] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/26/2021] [Accepted: 03/29/2021] [Indexed: 11/27/2022] Open
Abstract
While velocity-based training is currently a very popular paradigm to designing and monitoring resistance training programs, its implementation remains a challenge in team sports, where there are still some confusion and misinterpretations of its applications. In addition, in contexts with large squads, it is paramount to understand how to best use movement velocity in different exercises in a useful and time-efficient way. This manuscript aims to provide clarifications on the velocity-based training paradigm, movement velocity tracking technologies, assessment procedures and practical recommendations for its application during resistance training sessions, with the purpose of increasing performance, managing fatigue and preventing injuries. Guidelines to combine velocity metrics with subjective scales to prescribe training loads are presented, as well as methods to estimate 1-Repetition Maximum (1RM) on a daily basis using individual load–velocity profiles. Additionally, monitoring strategies to detect and evaluate changes in performance over time are discussed. Finally, limitations regarding the use of velocity of execution tracking devices and metrics such as “muscle power” are commented upon.
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Affiliation(s)
- Carlos Balsalobre-Fernández
- Applied Biomechanics and Sports Technology Research Group, Autonomous University of Madrid, 28049 Madrid, Spain
- Correspondence: or
| | - Lorena Torres-Ronda
- Institute for Health & Sport, Victoria University, Melbourne, VIC 3011, Australia;
- Spanish National Basketball Federation, 28036 Madrid, Spain
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29
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Balsalobre-Fernández C, Kipp K. Use of Machine-Learning and Load-Velocity Profiling to Estimate 1-Repetition Maximums for Two Variations of the Bench-Press Exercise. Sports (Basel) 2021; 9:39. [PMID: 33809614 DOI: 10.3390/sports9030039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/03/2021] [Accepted: 03/11/2021] [Indexed: 11/29/2022] Open
Abstract
The purpose of the current study was to compare the ability of five different methods to estimate eccentric–concentric and concentric-only bench-press 1RM from load–velocity profile data. Smith machine bench-press tests were performed in an eccentric–concentric (n = 192) and a concentric-only manner (n = 176) while mean concentric velocity was registered using a linear position transducer. Load–velocity profiles were derived from incremental submaximal load (40–80% 1RM) tests. Five different methods were used to calculate 1RM using the slope, intercept, and velocity at 1RM (minimum velocity threshold—MVT) from the load–velocity profiles: calculation with individual MVT, calculation with group average MVT, multilinear regression without MVT, regularized regression without MVT, and an artificial neural network without MVT. Mean average errors for all methods ranged from 2.7 to 3.3 kg. Calculations with individual or group MVT resulted in significant overprediction of eccentric–concentric 1RM (individual MVT: difference = 0.76 kg, p = 0.020, d = 0.17; group MVT: difference = 0.72 kg, p = 0.023, d = 0.17). The multilinear and regularized regression both resulted in the lowest errors and highest correlations. The results demonstrated that bench-press 1RM can be accurately estimated from load–velocity data derived from submaximal loads and without MVT. In addition, results showed that multilinear regression can be used to estimate bench-press 1RM. Collectively, the findings and resulting equations should be helpful for strength and conditioning coaches as they would help estimating 1RM without MVT data.
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30
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Nakatani M, Murata K, Kanehisa H, Takai Y. Force-velocity relationship profile of elbow flexors in male gymnasts. PeerJ 2021; 9:e10907. [PMID: 33777517 PMCID: PMC7971080 DOI: 10.7717/peerj.10907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/14/2021] [Indexed: 12/02/2022] Open
Abstract
Background The theoretical maximum force (F0), velocity (V0), and power (Pmax) of athletes calculated from the relationship between force and velocity (F-V relationship) and the slope of the F-V relationship, reflect their competitive and training activity profiles. Evaluating the F-V relationship of athletes facilitates categorizing the profiles of dynamic muscle functions in relation to long-term sport-specific training. For gymnastics, however, no studies have tried to examine the profiles of F-V relation and power output for upper limb muscles in relation to the muscularity, while the use of the upper extremities in this sport is very unique as described earlier. Purpose It was hypothesized that the F-V relationship of the elbow flexion in gymnasts might be characterized by low capacity for generating explosive force, notably in terms of the force normalized to muscle size. Methods The F0, V0, and Pmax derived from the force-velocity relationship during explosive elbow flexion against six different loads (unloaded condition, 15, 30, 45, 60, and 75% of maximal voluntary isometric elbow flexion force (MVFEF)) for 16 gymnasts (GYM) and 22 judo athletes (JD). F0 and Pmax were expressed as values relative to the cross-sectional area index (CSAindex) of elbow flexors (F0/CSAindex and Pmax/CSAindex, respectively), which was calculated from muscle thickness in the anterior upper arm. The electromyogram (EMG) activities of the biceps brachii (BB) during the maximal isometric and dynamic tasks were also determined. Results There were no significant differences in CSAindex of elbow flexors between GYM and JD. MVFEF/CSAindex for GYM was significantly lower than that for JD. Force was linearly associated with velocity in the dynamic elbow flexion for all the participants (r = − 0.997 to −0.905 for GYM, r = − 0.998 to −0.840 for JD). F0, F0/ CSAindex, V0, Pmax, Pmax/CSAindex, and MVFEF were significantly lower in GYM than in JD. The activity levels of BB during the dynamic tasks tended to be lower in GYM than in JD at load of <45%MVC. Conclusion Gymnasts cannot generate explosive elbow flexion force corresponding to their muscle size. This may be due to low neuromuscular activities during the maximal dynamic tasks against relatively low loads.
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Affiliation(s)
- Miyuki Nakatani
- The Center for Liberal Arts, Meiji Gakuin University, Yokohama, Kanagawa, Japan.,National Institute of Fitness and Sports in Kanoya, Kanoya, Kagosima, Japan
| | - Kensuke Murata
- National Institute of Fitness and Sports in Kanoya, Kanoya, Kagosima, Japan
| | - Hiroaki Kanehisa
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Yohei Takai
- National Institute of Fitness and Sports in Kanoya, Kanoya, Kagosima, Japan
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Odgers JB, Zourdos MC, Helms ER, Candow DG, Dahlstrom B, Bruno P, Sousa CA. Rating of Perceived Exertion and Velocity Relationships Among Trained Males and Females in the Front Squat and Hexagonal Bar Deadlift. J Strength Cond Res 2021; 35:S23-S30. [PMID: 33629974 DOI: 10.1519/jsc.0000000000003905] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Odgers, JB, Zourdos, MC, Helms, ER, Candow, DG, Dahlstrom, B, Bruno, P, and Sousa, CA. Rating of perceived exertion and velocity relationships among trained males and females in the front squat and hexagonal bar deadlift. J Strength Cond Res 35(2S): S23-S30, 2021-This study examined the accuracy of intraset rating of perceived exertion (RPE) to predict repetitions in reserve (RIR) during sets to failure at 80% of 1 repetition maximum (1RM) on the front squat and high-handle hexagonal bar deadlift (HHBD). Furthermore, the relationship between RPE and average concentric velocity (ACV) during the sets to failure was also determined. Fourteen males (29 ± 6 years, front squat relative 1RM: 1.78 ± 0.2 kg·kg-1, and HHBD relative 1RM: 3.0 ± 0.1 kg·kg-1) and 13 females (30 ± 5 years, front squat relative 1RM: 1.60 ± 0.2 kg·kg-1, and HHBD relative 1RM: 2.5 ± 0.3 kg·kg-1) visited the laboratory 3 times. The first visit tested 1RM on both exercises. During visits 2 and 3, which were performed in a counterbalanced order, subjects performed 4 sets to failure at 80% of 1RM for both exercises. During each set, subjects verbally indicated when they believed they were at "6" and "9" on the RIR-based RPE scale, and ACV was assessed during every repetition. The difference between the actual and predicted repetitions performed was recorded as the RPE difference (RPEDIFF). The RPEDIFF was significantly (p < 0.001) lower at the called 9 RPE versus the called 6 RPE in the front squat for males (9 RPE: 0.09 ± 0.19 versus 6 RPE: 0.71 ± 0.70) and females (9 RPE: 0.19 ± 0.36 versus 6 RPE: 0.86 ± 0.88) and in the HHBD for males (9 RPE: 0.25 ± 0.46 versus 6 RPE: 1.00 ± 1.12) and females (9 RPE: 0.21 ± 0.44 versus 6 RPE: 1.19 ± 1.16). Significant inverse relationships existed between RPE and ACV during both exercises (r = -0.98 to -1.00). These results indicate that well-trained males and females can gauge intraset RPE accurately during moderate repetition sets on the front squat and HHBD.
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Affiliation(s)
- Johnathan B Odgers
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Michael C Zourdos
- Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, Florida; and
| | - Eric R Helms
- Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
| | - Darren G Candow
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Barclay Dahlstrom
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Paul Bruno
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Colby A Sousa
- Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
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Abstract
Hackett, DA. Influence of movement velocity on accuracy of estimated repetitions to failure in resistance-trained men. J Strength Cond Res XX(X): 000-000, 2021-This study explored the accuracy in estimated repetitions to failure (ERF) and changes in mean concentric velocity (MCV) during resistance exercise. Twenty male resistance trainers (age, 26.3 ± 6.9 years; body mass, 82.0 ± 6.0 kg; stature, 178.0 ± 5.5 cm) completed 5 sets of 10 repetitions for the bench press and squat at 70% one-repetition maximum. Subjects' reported their rating of perceived exertion (RPE) and ERF after the 10th repetition of each set and then continued repetitions to momentary muscle failure (5-minute recovery between sets). Barbell velocity was assessed using a linear position transducer. For the bench press, MCV at repetitions 9-10 decreased as sets progressed (p ≤ 0.005) with a greater loss of MCV for sets 3-5 vs. set 1 (p ≤ 0.005). No significant changes in MCV variables were found across sets for the squat. Error in ERF was greater in set 1 for the bench press (p ≤ 0.005) with no differences for the remaining sets. There were no differences between sets for error in ERF for the squat. Moderate to strong relationships were found between most MCV variables and RPE and ERF, for the bench press (rs = -049 to 0.73; p ≤ 0.005). For the squat only, MCV at repetitions 9-10 was moderately related with RPE (rs = -0.33; p ≤ 0.003) and actual repetitions to failure (rs = 0.31; p ≤ 0.003). No significant relationships were found for error in ERF for either the bench press or squat. Changes in MCV across sets may influence perception of effort and performance for the bench press; however, it does not influence the accuracy in ERF for either exercise.
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Affiliation(s)
- Daniel A Hackett
- Physical Activity, Lifestyle, Ageing and Wellbeing Research Group, School of Health Sciences, Faculty of Medicine and Health, the University of Sydney, Lidcombe, NSW, Australia
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Iglesias-Soler E, Rial-Vázquez J, Boullosa D, Mayo X, Fariñas J, Rúa-Alonso M, Santos L. Load-velocity Profiles Change after Training Programs with Different Set Configurations. Int J Sports Med 2020; 42:794-802. [PMID: 33352601 DOI: 10.1055/a-1323-3456] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This study explored the changes in load-velocity relationship of bench press and parallel squat exercises following two programs differing in the set configuration. A randomized controlled trial was carried out in a sample of 39 physically active individuals. Participants were assigned to rest redistribution set configuration, traditional set configuration, or control groups. Over 5 weeks, the experimental groups completed 10 sessions with the 10 repetitions maximum load of both exercises. Rest redistribution sets consisted in 16 sets of 2 repetitions with 60 s of rest between sets, and 5 min between exercises, whereas traditional sets entailed 4 sets of 8 repetitions with 5 min of rest between sets and exercises. The load-velocity relationships of both exercises were obtained before and after the training period. For bench press, an increase of the velocity axis intercept, and a decrease of the slope at post-test were observed in both rest redistribution (p<0.001, G=1.264; p<0.001; G=0.997) and traditional set (p=0.01, G=0.654; p=0.001; G=0.593) groups. For squat, the slope decreased (p<0.001; G=0.588) and the velocity axis intercept increased (p<0.001; G=0.727) only in the rest redistribution group. These results show that rest redistribution sets were particularly efficient for inducing changes in the load-velocity relationship.
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Affiliation(s)
- Eliseo Iglesias-Soler
- Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, A Coruña, Spain
| | - Jessica Rial-Vázquez
- Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, A Coruña, Spain
| | - Daniel Boullosa
- INISA, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Xian Mayo
- Observatory of Healthy and Active Living of Spain Active Foundation, Centre for Sport Studies, King Juan Carlos University, Madrid, Spain
| | - Juan Fariñas
- Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, A Coruña, Spain
| | - María Rúa-Alonso
- Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, A Coruña, Spain
| | - Luis Santos
- Department of Physical Education and Sport, University of León, León, Spain
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Caven EJG, Bryan TJE, Dingley AF, Drury B, Garcia-Ramos A, Perez-Castilla A, Arede J, Fernandes JFT. Group versus Individualised Minimum Velocity Thresholds in the Prediction of Maximal Strength in Trained Female Athletes. Int J Environ Res Public Health 2020; 17:E7811. [PMID: 33114479 PMCID: PMC7662485 DOI: 10.3390/ijerph17217811] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/15/2020] [Accepted: 10/19/2020] [Indexed: 11/25/2022]
Abstract
This study examined the accuracy of different velocity-based methods in the prediction of bench press and squat one-repetition maximum (1RM) in female athletes. Seventeen trained females (age 17.8 ± 1.3 years) performed an incremental loading test to 1RM on bench press and squat with the mean velocity being recorded. The 1RM was estimated from the load-velocity relationship using the multiple- (8 loads) and two-point (2 loads) methods and group and individual minimum velocity thresholds (MVT). No significant effect of method, MVT or interaction was observed for the two exercises (p > 0.05). For bench press and squat, all prediction methods demonstrated very large to nearly perfect correlations with respect to the actual 1RM (r range = 0.76 to 0.97). The absolute error (range = 2.1 to 3.8 kg) for bench press demonstrated low errors that were independent of the method and MVT used. For squat, the favorable group MVT errors for the multiple- and two-point methods (absolute error = 7.8 and 9.7 kg, respectively) were greater than the individual MVT errors (absolute error = 4.9 and 6.3 kg, respectively). The 1RM can be accurately predicted from the load-velocity relationship in trained females, with the two-point method offering a quick and less fatiguing alternative to the multiple-point method.
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Affiliation(s)
- Elias J. G. Caven
- Higher Education Sport, Hartpury University, Gloucester GL19 3BE, UK; (E.J.G.C.); (T.J.E.B.); (A.F.D.); (B.D.)
| | - Tom J. E. Bryan
- Higher Education Sport, Hartpury University, Gloucester GL19 3BE, UK; (E.J.G.C.); (T.J.E.B.); (A.F.D.); (B.D.)
| | - Amelia F. Dingley
- Higher Education Sport, Hartpury University, Gloucester GL19 3BE, UK; (E.J.G.C.); (T.J.E.B.); (A.F.D.); (B.D.)
| | - Benjamin Drury
- Higher Education Sport, Hartpury University, Gloucester GL19 3BE, UK; (E.J.G.C.); (T.J.E.B.); (A.F.D.); (B.D.)
| | - Amador Garcia-Ramos
- Department of Physical Education and Sport, University of Granada, 52005 Granada, Spain; (A.G.-R.); (A.P.-C.)
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Alejandro Perez-Castilla
- Department of Physical Education and Sport, University of Granada, 52005 Granada, Spain; (A.G.-R.); (A.P.-C.)
| | - Jorge Arede
- Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal;
| | - John F. T. Fernandes
- Higher Education Sport, Hartpury University, Gloucester GL19 3BE, UK; (E.J.G.C.); (T.J.E.B.); (A.F.D.); (B.D.)
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Haff GG, Garcia-Ramos A, James LP. Using Velocity to Predict the Maximum Dynamic Strength in the Power Clean. Sports (Basel) 2020; 8:E129. [PMID: 32961845 DOI: 10.3390/sports8090129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 11/22/2022] Open
Abstract
The primary aim of the present study was to examine the commonly performed training exercise for athlete preparation. Twenty-two recreationally trained males (age: 26.3 ± 4.1 y, height: 1.80 ± 0.07 m; body mass (BM): 87.01 ± 13.75 kg, 1-repetitoon maximum(1-RM)/BM: 0.90 ± 0.19 kg) participated in the present study. All subjects had their 1-RM power clean tested with standard procedures. On a separate testing day, subjects performed three repetitions at 30% and 45%, and two repetitions at 70% and 80% of their 1-RM power clean. During all trials during both sessions, peak velocity (PV) and mean velocity (MV) were measured with the use of a GymAware device. There were no significant differences between the actual and estimated 1-RM power clean (p = 0.37, ES = −0.11) when the load-PV profile was utilized. There was a large typical error (TE) present for the load-PV- and load-MV-estimated 1-RM values. Additionally, the raw TE exceeded the smallest worthwhile change for both load-PV and load-MV profile results. Based upon the results of this study, the load-velocity profile is not an acceptable tool for monitoring power clean strength.
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Pérez-Castilla A, Jerez-Mayorga D, Martínez-García D, Rodríguez-Perea Á, Chirosa-Ríos LJ, García-Ramos A. Influence of Grip Width and Anthropometric Characteristics on the Bench-Press Load-Velocity Relationship. Int J Sports Physiol Perform 2020; 15:949-957. [PMID: 32182584 DOI: 10.1123/ijspp.2019-0549] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 11/18/2022]
Abstract
PURPOSE To compare the load-velocity (L-V) relationship between bench-press exercises performed using 4 different grip widths, to determine the association between the anthropometric characteristics and L-V profile, and to explore whether a multiple linear-regression model with movement velocity and subjects' anthropometric characteristics as predictor variables could increase the goodness of fit of the individualized L-V relationship. METHODS The individual L-V relationship of 20 men was evaluated by means of an incremental loading test during the bench-press exercise performed on a Smith machine using narrow, medium, wide, and self-selected grip widths. Simple and multiple linear-regression models were performed. RESULTS The mean velocity associated with each relative load did not differ among the 4 grip widths (P ≥ .130). Only body height and total arm length were correlated with the mean velocity associated with light and medium loads (r ≥ .464). A slightly higher variance of the velocity attained at each relative load was explained when some anthropometric characteristics were used as predictor variables along with the movement velocity (r2 = .969 [.965-.973]) in comparison with the movement velocity alone (r2 = .966 [.955-.968]). However, the amount of variance explained by the individual L-V relationships was always higher than with the multiple linear-regression models (r2 = .995 [.985-1.000]). CONCLUSIONS These results indicate that the individual determination of the L-V relationship using a self-selected grip width could be recommended to monitor relative loads in the Smith machine bench-press exercise.
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Andreu-Caravaca L, Ramos-Campo DJ, Abellán-Aynés O, Rubio-Arias JÁ. Movement Velocity as A Measure of Exercise Intensity in Persons with Multiple Sclerosis: A Validity Study. J Clin Med 2020; 9:jcm9082458. [PMID: 32751943 PMCID: PMC7464150 DOI: 10.3390/jcm9082458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/21/2020] [Accepted: 07/29/2020] [Indexed: 12/05/2022] Open
Abstract
Objectives: This study aims to analyse the validity (agreement between two methods) of the movement propulsive velocity (MPV) as an indicator of relative load in leg press (LP) and bench press (BP) exercises in persons with multiple sclerosis (MS). Methods: 18 persons with MS (sex = 55% male; age (mean ± SD) = 44.88 ± 10.62 years; body mass = 67.19 ± 10.63 kg; height = 1.66 ± 0.07 m; Expanded Disability Status Scale (EDSS) = 3.12 ± 1.73) performed an incremental loading test in BP and LP exercises in two separate sessions. Individual determination of the one-repetition maximum (1RM) and full load-velocity profile were obtained for each participant. Results: a significant linear relationship was observed between the %1RM load and the MPV in LP (%1RM = −133.58 × MPV + 117.44; r2 = 0.84; standard error of the estimate (SEE) = 9.38%1RM) and BP (%1RM = −95.66 × MPV + 115.26; r2 = 0.86; SEE = 9.82%1RM). In addition, no significant differences were found between the %1RM achieved directly and the %1RM obtained by the equation calculated from the linear regression (LP, p = 0.996; BP, p = 0.749). Conclusions: these results indicate that movement velocity can estimate the relative load in bench press and leg press exercises in persons MS.
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Affiliation(s)
- Luis Andreu-Caravaca
- Faculty of Sports, UCAM, Catholic University San Antonio, 30107 Murcia, Spain; (L.A.-C.); (D.J.R.-C.); (O.A.-A.)
- International Chair of Sport Medicine, UCAM, Catholic University San Antonio, 30107 Murcia, Spain
| | - Domingo Jesús Ramos-Campo
- Faculty of Sports, UCAM, Catholic University San Antonio, 30107 Murcia, Spain; (L.A.-C.); (D.J.R.-C.); (O.A.-A.)
| | - Oriol Abellán-Aynés
- Faculty of Sports, UCAM, Catholic University San Antonio, 30107 Murcia, Spain; (L.A.-C.); (D.J.R.-C.); (O.A.-A.)
- International Chair of Sport Medicine, UCAM, Catholic University San Antonio, 30107 Murcia, Spain
| | - Jacobo Ángel Rubio-Arias
- LFE Research Group, Department of Health and Human Performance, Faculty of 15 Physical Activity and Sport Science-INEF, Universidad Politécnica de Madrid, 28040 16 Madrid, Spain
- Correspondence: or ; Tel.: +34-968-27-87-57
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Pareja-Blanco F, Walker S, Häkkinen K. Validity of Using Velocity to Estimate Intensity in Resistance Exercises in Men and Women. Int J Sports Med 2020; 41:1047-1055. [PMID: 32688415 DOI: 10.1055/a-1171-2287] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study aimed to examine the validity of using bar velocity to estimate relative load in squat and bench-press exercises for both young men and women. Twenty-five men and 25 women performed a progressive loading test up to 1-RM in the squat and bench-press exercises, which were repeated after 2-weeks. Relationships between mean propulsive velocity and%1-RM were analysed. A second-order polynomial equation for predicting the corresponding velocity of each percentage of 1-RM was developed for men (validation). This equation was then applied in women (cross-validation). Moreover, a specific equation for women was developed (validation) and was also applied in a sub-sample of women (cross-validation). Close relationships (R2: 0.91-0.95) between bar velocity and relative load were observed in both sexes for squat and bench press. Men's equation applied to women showed a high level of agreement, although lower bias and higher level of agreement was observed when a sex-specific equation was applied in women, both validation and cross-validation samples. In conclusion, lifting velocity can be used to accurately prescribe the relative load regardless of sex in both upper-body and lower-body exercises, although when estimating load from velocity measures it will be necessary to use the sex-specific equation for each exercise.
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Affiliation(s)
- Fernando Pareja-Blanco
- Physical Performance & Sports Research Center, Department of Sports and Computers Sciences, Universidad Pablo de Olavide, Seville, Spain
| | - Simon Walker
- NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Keijo Häkkinen
- NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
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Cuevas-Aburto J, Janicijevic D, Pérez-Castilla A, Chirosa-Ríos LJ, García-Ramos A. Changes in bench press performance and throwing velocity after strength-oriented and ballistic resistance training programs. J Sports Med Phys Fitness 2020; 60:1423-1430. [PMID: 32674535 DOI: 10.23736/s0022-4707.20.11011-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND This study aimed to compare the effect of two upper-body resistance training programs (strength-oriented vs. ballistic) on bench press (BP) performance and handball throwing velocity (HTV). METHODS Thirty resistance-trained males were randomly assigned to a strength-oriented training group (STG) or a ballistic training group (BTG). The study consisted of 11 sessions: 2 pre-tests (week 1), 8 training sessions (weeks 2-5), and 1 post-test (week 6). The STG performed the BP at the 70-90% of the one-repetition maximum (1RM), and the BTG the BP throw at the 40% of 1RM. BP performance (BP 1RM and maximum velocity achieved against 20 kg [BP20]) and HTV were assessed before and after training. RESULTS The STG enhanced BP 1RM (effect size [ES]=0.24) but not BP20 (ES=0.21) or HTV (ES=0.10). The BTG enhanced BP20 (ES=0.63) but not BP1RM (ES=0.27) or HTV (ES=0.02). HTV was not significantly correlated with the BP 1RM (r≤0.181) or BP20 (r≤0.220). CONCLUSIONS These results indicate that a short-term RT program based exclusively on the BP exercise performed against either heavy (strength-oriented) or light loads (ballistic) is not effective to increase HTV in resistance-trained men with little handball experience.
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Affiliation(s)
- Jesualdo Cuevas-Aburto
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima Concepción (UCSC), Concepción, Chile
| | - Danica Janicijevic
- Faculty of Sport and Physical Education, The Research Centre, University of Belgrade, Belgrade, Serbia -
| | - Alejandro Pérez-Castilla
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Luis J Chirosa-Ríos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Amador García-Ramos
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima Concepción (UCSC), Concepción, Chile.,Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
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Thng S, Pearson S, Rathbone E, Keogh JWL. The prediction of swim start performance based on squat jump force-time characteristics. PeerJ 2020; 8:e9208. [PMID: 32547864 PMCID: PMC7271885 DOI: 10.7717/peerj.9208] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 04/27/2020] [Indexed: 11/20/2022] Open
Abstract
Background Depending on the stroke and distances of the events, swim starts have been estimated to account for 0.8% to 26.1% of the overall race time, with the latter representing the percentage in a 50 m sprint front crawl event (Cossor & Mason, 2001). However, it is still somewhat unclear what are the key physiological characteristics underpinning swim start performance. The primary aim of this study was to develop a multiple regression model to determine key lower body force-time predictors using the squat jump for swim start performance as assessed by time to 5 m and 15 m in national and international level swimmers. A secondary aim was to determine if any differences exist between males and females in jump performance predictors for swim start performance. Methods A total of 38 males (age 21 ± 3.1 years, height 1.83 ± 0.08 m, body mass 76.7 ± 10.2 kg) and 34 females (age 20.1 ± 3.2 years, height 1.73 ± 0.06 m, body mass 64.8 ± 8.4 kg) who had competed at either an elite (n = 31) or national level (n = 41) participated in this study. All tests were performed on the same day, with participants performing three bodyweight squat jumps on a force platform, followed by three swim starts using their main swimming stroke. Swim start performance was quantified via time to 5 m and 15 m using an instrumented starting block. Results Stepwise multiple linear regression with quadratic fitting identified concentric impulse and concentric impulse2 as statistically significant predictors for time to 5 m (R2 = 0.659) in males. With time to 15 m, concentric impulse, age and concentric impulse2 were statistically significant predictors for males (R2 = 0.807). A minimum concentric impulse of 200–230 N.s appears required for faster times to 5 m and 15 m, with any additional impulse production not being associated with a reduction in swim start times for most male swimmers. Concentric impulse, Reactive strength index modified and concentric mean power were identified as statistically significant predictors for female swimmers to time to 5 m (R2 = 0.689). Variables that were statistically significant predictors of time to 15 m in females were concentric impulse, body mass, concentric rate of power development and Reactive strength index modified (R2 = 0.841). Discussion The results of this study highlight the importance of lower body power and strength for swim start performance, although being able to produce greater than 200 or 230 N.s concentric impulse in squat jump did not necessarily increase swim start performance over 5 m and 15 m, respectively. Swimmers who can already generate greater levels of concentric impulse may benefit more from improving their rate of force development and/or technical aspects of the swim start performance. The sex-related differences in key force-time predictors suggest that male and female swimmers may require individualised strength and conditioning programs and regular monitoring of performance.
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Affiliation(s)
- Shiqi Thng
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia.,Queensland Academy of Sport, Nathan, QLD, Australia
| | | | - Evelyne Rathbone
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia
| | - Justin W L Keogh
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia.,Sports Performance Research Centre New Zealand, Auckland University of Technology, Auckland, New Zealand.,Cluster for Health Improvement, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, QLD, Australia.,Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
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Orange ST, Metcalfe JW, Robinson A, Applegarth MJ, Liefeith A. Effects of In-Season Velocity- Versus Percentage-Based Training in Academy Rugby League Players. Int J Sports Physiol Perform 2020; 15:554-561. [PMID: 31672928 DOI: 10.1123/ijspp.2019-0058] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 11/18/2022]
Abstract
PURPOSE To compare the effects of velocity-based training (VBT) vs percentage-based training (PBT) on strength, speed, and jump performance in academy rugby league players during a 7-wk in-season mesocycle. METHODS A total of 27 rugby league players competing in the Super League U19s Championship were randomized to VBT (n = 12) or PBT (n = 15). Both groups completed a 7-wk resistance-training intervention (2×/wk) that involved the back squat. The PBT group used a fixed load based on a percentage of 1-repetition maximum (1-RM), whereas the VBT group used a modifiable load based on individualized velocity thresholds. Biomechanical and perceptual data were collected during each training session. Back-squat 1-RM, countermovement jump, reactive strength index, sprint times, and back-squat velocity at 40-90% 1-RM were assessed pretraining and posttraining. RESULTS The PBT group showed likely to most likely improvements in 1-RM strength and reactive strength index, whereas the VBT group showed likely to very likely improvements in 1-RM strength, countermovement jump height, and back-squat velocity at 40% and 60% 1-RM. Sessional velocity and power were most likely greater during VBT compared with PBT (standardized mean differences = 1.8-2.4), while time under tension and perceptual training stress were likely lower (standardized mean differences = 0.49-0.66). The improvement in back-squat velocity at 60% 1-RM was likely greater following VBT compared with PBT (standardized mean difference = 0.50). CONCLUSION VBT can be implemented during the competitive season, instead of traditional PBT, to improve training stimuli, decrease training stress, and promote velocity-specific adaptations.
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Marcos-Pardo PJ, González-Hernández JM, García-Ramos A, López-Vivancos A, Jiménez-Reyes P. Movement velocity can be used to estimate the relative load during the bench press and leg press exercises in older women. PeerJ 2019; 7:e7533. [PMID: 31497399 PMCID: PMC6707344 DOI: 10.7717/peerj.7533] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/22/2019] [Indexed: 12/14/2022] Open
Abstract
Background Movement velocity has been proposed as an effective tool to prescribe the load during resistance training in young healthy adults. This study aimed to elucidate whether movement velocity could also be used to estimate the relative load (i.e., % of the one-repetition maximum (1RM)) in older women. Methods A total of 22 older women (age = 68.2 ± 3.6 years, bench press 1RM = 22.3 ± 4.7 kg, leg press 1RM = 114.6 ± 15.9 kg) performed an incremental loading test during the free-weight bench press and the leg press exercises on two separate sessions. The mean velocity (MV) was collected with a linear position transducer. Results A strong linear relationship between MV and the relative load was observed for the bench press (%1RM = −130.4 MV + 119.3; r2 = 0.827, standard error of the estimate (SEE) = 6.10%1RM, p < 0.001) and leg press exercises (%1RM = −158.3 MV + 131.4; r2 = 0.913, SEE = 5.63%1RM, p < 0.001). No significant differences were observed between the bench press and leg press exercises for the MV attained against light-medium relative loads (≤70%1RM), while the MV associated with heavy loads (≥80%1RM) was significantly higher for the leg press. Conclusions These results suggest that the monitoring of MV could be useful to prescribe the loads during resistance training in older women. However, it should be noted that the MV associated with a given %1RM is significantly lower in older women compared to young healthy individuals.
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Affiliation(s)
| | - Jorge Miguel González-Hernández
- Faculty of Sport, Catholic University San Antonio of Murcia, Murcia, Spain.,Faculty of Health Science, European University of Canarias, Tenerife, Islas Canarias, Spain
| | - Amador García-Ramos
- Faculty of Sport Sciences, University of Granada, Granada, Spain.,Department of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | | | - Pedro Jiménez-Reyes
- Centre for Sports Studies, Rey Juan Carlos University, Alcorcón, Madrid, Spain
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Abstract
This study aimed to explore the differences in the load-velocity profile between three upper-body pushing exercises in men and women. The load-velocity profiles (from 20% to 100% of the one-repetition maximum [1RM] in 5% increments) of 24 sport sciences students (12 men) were randomly tested during the horizontal bench press (HBP), inclined bench press (IBP) and seated military press (SMP) exercises. The 1RM was higher for the HBP (men: 94.2 ± 14.6 kg; women: 45.4 ± 10.1 kg), followed by the IBP (men: 87.7 ± 11.6 kg; women: 41.6 ± 6.6 kg), and finally the SMP (men: 67.4 ± 7.8 kg; women: 37.3 ± 6.3 kg). The mean test velocity (i.e., averaged velocity of all loads) and the slope of the load-velocity profile were significantly different between exercises (SMP > IBP > HBP) and sexes (men > women). The correlations between the exercises were very high for the individual 1RM values (r range = 0.714-0.982), but lower correlations were observed for the mean test velocity (r range = 0.237-0.766) slope of the load-velocity profile (r range = 0.018-0.721), and velocity of the 1RM (r range = 0.004-0.446). These results confirm that men present higher velocities at low relative loads (i.e., %1RM) compared to women during upper-body pushing exercises.
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Affiliation(s)
- Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain.,Department of Sports Sciences and Physical Conditioning, Faculty of Education, Catholic University of the Most Holy Concepción, Concepción, Chile
| | - Dejan Suzovic
- The Research Centre, Faculty of Sport and Physical Education, University of Belgrade, Belgrade, Serbia
| | - Alejandro Pérez-Castilla
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
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45
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Torrejón A, Janicijevic D, Haff GG, García-Ramos A. Acute effects of different set configurations during a strength-oriented resistance training session on barbell velocity and the force-velocity relationship in resistance-trained males and females. Eur J Appl Physiol 2019; 119:1409-1417. [PMID: 30955089 DOI: 10.1007/s00421-019-04131-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 03/26/2019] [Indexed: 01/04/2023]
Abstract
PURPOSE This study explored the acute effects of strength-oriented resistance training sessions performed using three different set configurations on barbell velocity and the force-velocity (F-v) relationship of upper-body muscles in men and women. METHOD Thirteen men (age: 23.8 ± 2.5 years; 6-repetition maximum [6RM] load: 73.4 ± 15.6 kg) and 13 women (age: 21.5 ± 1.4 years; 6RM load: 32.8 ± 5.2 kg) performed 24 repetitions with a 6RM load during the bench press exercise using traditional (TR: 6 sets of 4 repetitions with 3 min of rest between sets), cluster (CL: 6 sets of 4 repetitions with 15 s of intra-set rest every two repetitions and 2 min and 45 s of rest between sets) and inter-repetition rest (IRR: 1 set of 24 repetitions with 39 s of rest between repetitions) set configurations. The F-v relationship parameters [maximum force (F0), maximum velocity (v0) and maximum power (Pmax)] were determined before and after each training session. RESULTS The average training velocity did not differ between the three set configurations (p = 0.234), but the IRR set configuration generally provided higher velocities during the last repetition of each set. Significant decreases in F0 (p = 0.001) and Pmax (p = 0.024) but not in v0 (p = 0.669) were observed after the training sessions. Comparable velocity loss was observed for men and women (- 12.1% vs. - 11.3%; p = 0.699). CONCLUSIONS The administration of very short intra-set rest periods does not allow for the attainment of higher velocities than traditional set configurations during strength-oriented resistance training sessions conducted with the bench press exercise when the work-to-rest ratio is equated.
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Affiliation(s)
- Alejandro Torrejón
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain.
| | - Danica Janicijevic
- Faculty of Sport and Physical Education, University of Belgrade, The Research Centre, Belgrade, Serbia
| | - Guy Gregory Haff
- Centre for Exercise and Sports Science Research, Edith Cowan University, Joondalup, WA, Australia
| | - Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain.,Department of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Catholic University of Most Holy Concepción, Concepción, Chile
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46
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Iglesias-Soler E, Mayo X, Rial-Vázquez J, Haff GG. Inter-individual variability in the load-velocity relationship is detected by multilevel mixed regression models. Sports Biomech 2018; 20:304-318. [PMID: 30526367 DOI: 10.1080/14763141.2018.1548640] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The main aim of this study was to explore the variability in the load-velocity relationship through the use of multilevel mixed regression models. The relationship between relative load (% of one repetition maximum: %1RM) and velocity was obtained in a sample of high-level judokas and rugby players (8 women and 13 men) for the bench press (BP) and parallel squat (SQ). The load-velocity relationship for the squat was obtained for the external load (barbell load) and for the system mass (barbell plus body mass). The data were fitted by different multilevel mixed regression models. Including the sex factor in the models improved the goodness of fit for the BP but not for the squat exercises. All the models detected significant inter-individual variability in both intercepts and slopes (p < 0.05 in all the cases). A decrease of 0.15, 0.10 and 0.16 m/s of velocity for each 10% of increment in the relative load were estimated for BP and squat considering the external load and the system mass, respectively. The multilevel mixed regression models detected significant inter-individual variability in the slope and intercept of the load-velocity relationship what entails differences in the velocity associated with a fixed percentage (%) of the one-repetition maximum load.
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Affiliation(s)
- Eliseo Iglesias-Soler
- Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna , A Coruña, Spain
| | - Xian Mayo
- Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna , A Coruña, Spain.,Observatory of Healthy & Active Living of Spain Active Foundation, Centre for Sport Studies, King Juan Carlos University , Madrid, Spain
| | - Jéssica Rial-Vázquez
- Observatory of Healthy & Active Living of Spain Active Foundation, Centre for Sport Studies, King Juan Carlos University , Madrid, Spain
| | - Guy G Haff
- Centre for Exercise and Sports Science Research, Edith Cowan University , Joondalup, Australia
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García-Ramos A, Pérez-Castilla A, Villar Macias FJ, Latorre-Román PÁ, Párraga JA, García-Pinillos F. Differences in the one-repetition maximum and load-velocity profile between the flat and arched bench press in competitive powerlifters. Sports Biomech 2018; 20:261-273. [PMID: 30526366 DOI: 10.1080/14763141.2018.1544662] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study aimed to compare the one-repetition maximum (1RM) and the velocity outcomes obtained against the same absolute and relative (%1RM) loads between the flat and arched bench press (BP) variants. Eleven competitive male powerlifters were evaluated in one session with the flat BP (natural lumbar arch and moderate scapular retraction) and in another session with the arched BP (pronounced lumbar arch and scapular retraction). An incremental loading test was used to determine the 1RM as well as the barbell's velocity against the different external loads. The main findings revealed that the 1RM did not significantly differ between the flat (115.9 ± 17.9 kg) and arched (115.7 ± 18.4 kg) BP variants (p = 0.942, effect size = 0.01), while there were no significant differences between BP variants either for the velocity outcomes obtained against the individual loads nor for the velocities associated with each %1RM (p > 0.05). These results suggest that competitive powerlifters do not necessarily present their higher 1RM performance using the arched BP variant. Finally, both BP variants could be used interchangeably when using movement velocity for testing upper-body strength as well as for prescribing the load during velocity-based resistance training routines.
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Affiliation(s)
- Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada , Granada, Spain.,Department of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Catholic University of the Most Holy Concepción , Concepción, Chile
| | - Alejandro Pérez-Castilla
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada , Granada, Spain
| | | | | | - Juan A Párraga
- Department of Corporal Expression, University of Jaen , Jaen, Spain
| | - Felipe García-Pinillos
- Department of Physical Education, Sports and Recreation. Universidad de La Frontera , Temuco, Chile
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48
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Suchomel TJ, Taber CB, Sole CJ, Stone MH. Force-Time Differences between Ballistic and Non-Ballistic Half-Squats. Sports (Basel) 2018; 6:sports6030079. [PMID: 30103536 PMCID: PMC6162472 DOI: 10.3390/sports6030079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 07/29/2018] [Accepted: 08/10/2018] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to examine the force-time differences between concentric-only half-squats (COHS) performed with ballistic (BAL) or non-ballistic (NBAL) intent across a range of loads. Eighteen resistance-trained men performed either BAL or NBAL COHS at 30%, 50%, 70%, and 90% of their one repetition maximum (1RM) COHS. Relative peak force (PF) and relative impulse from 0–50 ms (Imp50), 0–90 ms (Imp90), 0–200 ms (Imp200), and 0–250 ms (Imp250) were compared using a series of 2 × 4 (intent × load) repeated measures ANOVAs with Bonferroni post hoc tests. Cohen’s d effect sizes were calculated to provide measures of practical significance between the BAL and NBAL COHS and each load. BAL COHS produced statistically greater PF than NBAL COHS at 30% (d = 3.37), 50% (d = 2.88), 70% (d = 2.29), and 90% 1RM (d = 1.19) (all p < 0.001). Statistically significant main effect differences were found between load-averaged BAL and NBAL COHS for Imp90 (p = 0.006, d = 0.25), Imp200 (p = 0.001, d = 0.36), and Imp250 (p < 0.001, d = 0.41), but not for Imp50 (p = 0.018, d = 0.21). Considering the greater PF and impulse observed during the BAL condition, performing COHS with BAL intent may provide a favorable training stimulus compared to COHS performed with NBAL intent.
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Affiliation(s)
- Timothy J Suchomel
- Department of Human Movement Sciences, Carroll University, Waukesha, WI 53186, USA.
| | - Christopher B Taber
- Department of Exercise Science, Sacred Heart University, Fairfield, CT 06825, USA.
| | - Christopher J Sole
- Department of Health and Human Performance, The Citadel-The Military College of South Carolina, Charleston, SC 29409, USA.
| | - Michael H Stone
- Department of Exercise and Sport Sciences, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, TN 37614, USA.
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