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Sašek M, Šarabon N, Smajla D. Exploring the relationship between lower limb strength, strength asymmetries, and curvilinear sprint performance: Findings from a pilot study. Sci Prog 2024; 107:368504241247998. [PMID: 38651328 PMCID: PMC11036933 DOI: 10.1177/00368504241247998] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Team sports involve various sprinting actions, including curvilinear sprints, yet their neuromuscular factors have been understudied. The aim of this cross-sectional study was to investigate the relationship between lower limb muscle strength, strength asymmetries, linear sprint and curvilinear sprint performance. At two visits 12 male (age: 24.8 ± 4.7 years, height: 1.82 ± 0.06 m, body mass: 80 ± 6.58 kg) and 6 female (age: 20.8 ± 1.33 years, body height: 1.60 ± 0.02 m, body mass: 55.3 ± 2.88 kg) student-athletes completed isometric strength measurements of the knee flexors (KF), knee extensors (KE), hip abductors (HABD), hip adductors (HADD), as well as linear sprint and curvilinear sprint to the right and left. Sprint split times over 30 m (t30) were measured and curvilinear sprint split time deficits (t30deficit) and inter-limb strength asymmetries were calculated. Very large negative correlations were observed between HADD and HABD strength on one side and t30 of curvilinear sprint to the left (r = -0.75 and -0.71; p < 0.001) and right (ρ = -0.81 and -0.70; p < 0.001) on the other. The regression model consisting of HADD, HABD, and KF explained 76% and 67% of the variance in left and right curvilinear sprint t30, respectively. Similarly, 59% of the left curvilinear sprint t30deficit variance was explained by the HABD and KF strength. High inter-limb HABD strength symmetry was related to better left and right curvilinear sprint t30 (r = 0.71 and ρ = 0.75, p < 0.001). These results highlight the pivotal role of hip strength for curvilinear sprint speed, and emphasize the need of symmetrical HABD muscle strength to optimize neuromuscular function during curvilinear sprint.
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Affiliation(s)
- Matic Sašek
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
| | - Nejc Šarabon
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
- Andrej Marušič Institute, University of Primorska, Koper, Slovenia
- Laboratory for Motor Control and Motor Behavior, S2P, Science To Practice, Ltd, Ljubljana, Slovenia
- Ludwig Boltzmann Institute for Rehabilitation Research, Vienna, Austria
| | - Darjan Smajla
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
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Rites AA, Merino-Muñoz P, Ribeiro F, Miarka B, Salermo V, Gomes DV, Brito CJ, Aedo-Muñoz E. Effects of peppermint oil inhalation on vertical jump performance in elite young professional soccer players: A double-blinded randomized crossover study. Heliyon 2024; 10:e24360. [PMID: 38293549 PMCID: PMC10826725 DOI: 10.1016/j.heliyon.2024.e24360] [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: 05/12/2023] [Revised: 01/06/2024] [Accepted: 01/08/2024] [Indexed: 02/01/2024] Open
Abstract
Aims To evaluate peppermint essential oil (PEO) inhalation's effect on young soccer athletes' motor performance. Methods A randomized crossover design was used to test the effect of the PEO. Eleven U-17 soccer players were evaluated into two conditions (PEO and Placebo - PLA). The players were tested in squat jump and countermovement jump and inhaled PEO or PLA and 10 min later performed the physical tests again. A mixed ANOVA was performed to test the hypotheses. Results Main effects were found for the time in jumping height in the CMJ (p = 0.037). No main and interaction effects were found in the SJ variables. Conclusion From the results, decrease CMJ performance acutely, both conditions presented decrease in JH, but based in effect size, PLA decrease is higher (more sample size for corroborate this) possibly due to improvements in the eccentric yielding sub-phase, where mentioned phase could be reflecting neural changes (required experimental verification). The PEO could be the interest in trainers for use before of match or in the half-time for minimize the decreased of physical performance by the rest.
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Affiliation(s)
- Alex Ambrosio Rites
- Postgraduate Program in Physical Education. Federal University of Rio de Janeiro, Brazil
- Fluminense Football Club, Brazil
| | - Pablo Merino-Muñoz
- Núcleo de investigación en ciencias de la motricidad humana, Universidad Adventista de Chile, Chile
- Escuela de Ciencias de la Actividad Física, el Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Chile
| | | | - Bianca Miarka
- Postgraduate Program in Physical Education. Federal University of Rio de Janeiro, Brazil
| | - Veronica Salermo
- Postgraduate Program in Physical Education. Federal University of Rio de Janeiro, Brazil
| | - Diego Viana Gomes
- Postgraduate Program in Physical Education. Federal University of Rio de Janeiro, Brazil
| | - Ciro José Brito
- Escuela de Ciencias de la Actividad Física, el Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Chile
| | - Esteban Aedo-Muñoz
- Escuela de Ciencias de la Actividad Física, el Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Chile
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Philipp NM, Cabarkapa D, Nijem RM, Blackburn SD, Fry AC. Vertical Jump Neuromuscular Performance Characteristics Determining On-Court Contribution in Male and Female NCAA Division 1 Basketball Players. Sports (Basel) 2023; 11:239. [PMID: 38133106 PMCID: PMC10748117 DOI: 10.3390/sports11120239] [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: 09/26/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
While various quantifiable physical attributes have been found to contribute to athletes' performance, there is a lack of scientific literature focused on examining how they relate to success during competition performance. The aim of this study was to investigate different countermovement jump (CMJ)-derived force-time characteristics and their utility in distinguishing high from low performers within a measure of on-court contribution (i.e., minutes per game played). Twenty-nine collegiate athletes (n = 15 males and n = 14 females) volunteered to participate in this investigation and performed CMJs on dual force plates sampling at 1000 Hz, weekly over the course of their basketball season. The athletes' average of their three best test-days across the season was used for further analysis. To identify their on-court contribution, athletes were divided into groups with high and low minutes per game, based on a median-split analysis. The findings suggest that at the overall group level (i.e., both genders), the modified reactive strength index (mRSI) and braking rate of force development (RFD) revealed the greatest between-group magnitudes of difference, with athletes playing more minutes per game showing greater performance. At the team-specific level, the braking RFD, average braking velocity, and mRSI were shown to be the greatest differentiators between groups for the men's team. The women's high-minutes group displayed greater magnitudes of mRSI and jump height. By identifying the neuromuscular qualities seen in top performers within their respective populations, the attributed physical performance underpinning these qualities may be identified, providing practitioners with insights into physical performance qualities and training methodologies that have the potential to influence basketball performance.
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Affiliation(s)
- Nicolas M. Philipp
- Jayhawk Athletic Performance Laboratory—Wu Tsai Human Performance Alliance, Department of Health, Sport and Exercise Science, University of Kansas, Lawrence, KS 66045, USA; (D.C.); (R.M.N.); (S.D.B.); (A.C.F.)
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Smolarek T, Haff GG, Poon WCK, Nagatani T, Barley OR, Guppy SN. Dynamic and Isometric Force-Time Curve Characteristics Influencing Change of Direction Performance of State-Level Netball Players. J Strength Cond Res 2023; 37:2397-2404. [PMID: 37815246 DOI: 10.1519/jsc.0000000000004616] [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: 10/11/2023]
Abstract
ABSTRACT Smolarek, T, Haff, GG, Poon, WCK, Nagatani, T, Barley, OR, and Guppy, SN. Dynamic and isometric force-time curve characteristics influencing change of direction performance of state-level netball players. J Strength Cond Res 37(12): 2397-2404, 2023-Although multiple lower-body strength capacities are required to change direction rapidly, there is limited knowledge about the relative importance of these factors. Therefore, the purpose of this study was to assess the relationship between dynamic and isometric lower-body strength capacities and change of direction (COD) time in state-league netball players. Seventeen female athletes completed maximal isometric midthigh pull (IMTP), countermovement jump (CMJ), and modified 5-0-5 COD tests. Pearson's product moment correlations were used to determine the relationship between COD time and several IMTP and CMJ force-time curve characteristics. To assess the level of contribution of each force-time curve characteristic to COD time, multivariate-linear stepwise regression analyses were performed. A significant moderate correlation was noted between net relative peak force (PF) during the IMTP and COD time ( r = 0.488, p = 0.047), accounting for 23.8% of the variance in COD time. Moreover, concentric relative impulse during the CMJ was strongly correlated with COD time ( r = 0.718; p = 0.001), explaining 81.9% of the variance in COD time when combined with net relative braking PF in a stepwise regression. Based on these findings, female netball players who display higher concentric and isometric strength, as well as the ability to express higher impulses during the concentric phase of the CMJ, are likely to perform CODs faster. This may occur because COD requires the generation of greater propulsive forces, as well as reduced braking and contact times, along with greater isometric strength enabling effective repositioning of center of mass during COD tasks.
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Affiliation(s)
- Tinka Smolarek
- Institute of Sport and Exercise Sciences, University of Münster, Münster, Germany
| | - G Gregory Haff
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia; and
- Directorate of Psychology and Sport, University of Salford, Salford, United Kingdom
| | - Wayne C K Poon
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia; and
| | - Tsuyoshi Nagatani
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia; and
| | - Oliver R Barley
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia; and
| | - Stuart N Guppy
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia; and
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Seidi F, Izadi M, Thomas AC, Bellafiore M. Lower limb muscle activation pattern in male soccer players with lumbar hyperlordosis. J Bodyw Mov Ther 2023; 36:263-269. [PMID: 37949570 DOI: 10.1016/j.jbmt.2023.03.004] [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: 01/27/2022] [Revised: 03/04/2023] [Accepted: 03/14/2023] [Indexed: 11/12/2023]
Abstract
OBJECTIVE the aim of the current study was to compare the lower limb muscle activation pattern in soccer players with and without lumbar hyperlordosis during single-leg squat performance. METHODS thirty male collegiate soccer players (15 with and 15 without lumbar hyperlordosis) performed the SLS task. Surface EMG was used to record the activation of eleven lower limb muscles. The activation of these muscles reduces to 100 points during the SLS cycle, where 50% demonstrates the maximum knee flexion, and 0% and 99% demonstrate the maximum knee extension. RESULTS soccer players with lumbar hyperlordosis had higher muscle activation than those with normal lumbar lordosis in gluteus maximus, biceps femoris, and medial gastrocnemius. By contrast, they had lower gluteus medius, vastus medialis oblique, rectus femoris, soleus, and medial gastrocnemius (only in the final ascent phase of the SLS) muscle activity than the normal group during the SLS. CONCLUSION this alteration may negatively affect targeted muscle performance during the SLS. Subsequent study is required to specify whether such an alteration in the lower limb muscle could be accompanied by injury in soccer players and change in their athletic performance.
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Affiliation(s)
- Foad Seidi
- Department of Health and Sports Medicine, Faculty of Physical Education and Sport Science, University of Tehran, Iran
| | - Mohammad Izadi
- Department of Health and Sports Medicine, Faculty of Physical Education and Sport Science, University of Tehran, Iran; Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy.
| | - Abbey C Thomas
- Department of Kinesiology at University of North Carolina at Charlotte, USA
| | - Marianna Bellafiore
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy
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Chang CC, Chiang CY. Using the Countermovement Jump Metrics to Assess Dynamic Eccentric Strength: A Preliminary Study. Int J Environ Res Public Health 2022; 19:16176. [PMID: 36498250 PMCID: PMC9736282 DOI: 10.3390/ijerph192316176] [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: 10/20/2022] [Revised: 11/24/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Background: This study aimed to determine the validity and reliability of the countermovement jump (CMJ) as a dynamic eccentric (Ecc) strength test. Methods: Thirty-three college male student-athletes were recruited to participate in this study. The participants first performed CMJs with the second consisting of one repetition maximum back squat (1RM-BS) test. CMJ and 1RM-BS tests were performed on twin force plates. Results: The CMJ had significant correlations with the Ecc peak force (EccPF), and Ecc mean force (EccMF) of 1RM-BS, respectively (r = 0.61−0.69). Moreover, all parameters had a coefficient of variation (CV) < 10%. The intraclass correlation coefficient (ICC) values were moderate to excellent for each metric using the CMJ (0.94−0.97). The 1RM-BS and CMJ EccPF, EccMF Bland-Altman bias estimate variance ratio is 1.31−1.67, showing a moderate-large correlation in the Bland-Altman plot. Conclusions: CMJ ECC phase kinetics were associated with the 1RM-BS EccPF and EccMF. The CMJ can be an alternative tool for eccentric dynamic strength assessment.
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Affiliation(s)
- Chien-Chun Chang
- Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan 333, Taiwan
| | - Chieh-Ying Chiang
- Department of Sports Training Science-Combats, National Taiwan Sport University, Taoyuan 333, Taiwan
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