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Monasterio X, Gil SM, Bidaurrazaga-Letona I, Cumming SP, Malina RM, Williams S, Lekue JA, Santisteban JM, Diaz-Beitia G, Larruskain J. Estimating Maturity Status in Elite Youth Soccer Players: Evaluation of Methods. Med Sci Sports Exerc 2024; 56:1124-1133. [PMID: 38377009 DOI: 10.1249/mss.0000000000003405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
PURPOSE The objective of this study is to evaluate the concordance of predicted maturity status classifications (pre-, circa-, or post-peak height velocity (PHV)) relative to observed age at PHV in youth soccer players. METHODS Longitudinal height records for 124 male soccer players were extracted from academy records spanning the 2000 to 2022 seasons. Age at PHV for each player was estimated with the Superimposition by Translation and Rotation model. Players were classified as pre-, circa-, or post-PHV using both ±1- and ±0.5-yr criteria to define the circa-PHV interval. Maturity status was estimated with several prediction protocols: maturity offset (Mirwald, Moore-1, Moore-2), maturity ratio (Fransen), and percentage of predicted adult height (PAH%) using the Khamis-Roche and Tanner-Whitehouse 2 equations using several bands: 85% to 96%, 88% to 96%, 88% to 93%, and 90% to 93% for the circa-PHV interval, and visual evaluation of individual growth curves alone or with PAH% based on Khamis-Roche and Tanner-Whitehouse 2. Concordance of maturity status classifications based on complete growth curves and predicted estimates of maturity status was addressed with percentage agreement and Cohen's kappa. RESULTS Visual evaluation of the growth curves had the highest concordance (≈80%) with maturity status classifications (pre-, circa-, post-PHV) based on longitudinal data for individual players. Predicted maturity offset with the Mirwald, Moore-1, and Fransen equations misclassified about one-third to one-half of the players, whereas concordance based on PAH% varied with the band used, but not with the method of height prediction. CONCLUSIONS Visual assessment of the individual growth curves by an experienced assessor provides an accurate estimate of maturity status relative to PHV. Maturity offset prediction equations misclassify the majority of players, whereas PAH% provides a reasonably valid alternative.
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Affiliation(s)
| | - Susana M Gil
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, SPAIN
| | - Iraia Bidaurrazaga-Letona
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, SPAIN
| | - Sean P Cumming
- Department for Health, University of Bath, Bath, UNITED KINGDOM
| | - Robert M Malina
- Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX
| | - Sean Williams
- Department for Health, University of Bath, Bath, UNITED KINGDOM
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Abbott S, Hogan C, Postiglione G, Barclay G, Cobley S. Advancing athlete development: How Percentile Comparison Methods (PCMs) can identify youth developmental profiles. J Sci Med Sport 2024:S1440-2440(24)00081-1. [PMID: 38594115 DOI: 10.1016/j.jsams.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/07/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
OBJECTIVES Inter-individual developmental differences confound the capability to accurately evaluate youth athletic performance, highlighting the need for considerate methodology and analytical approaches. The present study demonstrated how Percentile Comparison Methods (PCMs) were developed, tested, and applied to identify athlete developmental profiles in Australian youth swimming. DESIGN Cross-sectional. METHODS Participants were N = 866 female 100-metre (m) Front-Crawl swimmers, aged 9-15 years, competing at 36 Australian regional-national level long course events. At respective events, swim performance time was collated alongside, age, date of birth, and anthropometric measures to identify age group, relative age, and maturity status. Quadratic relative age and maturity status with 100-m performance regression trendlines were generated. Then, individual swim performances at a given relative age or maturity status were converted into percentile rank distributions and compared with raw (unadjusted) annual age-group performance percentile ranks. RESULTS At a cohort level, initial testing confirmed relative age and maturity-adjusted percentile rankings were associated with general rank improvements for relatively younger and later maturing swimmers compared to raw ranks (and vice versa). When assessing individual swimmer plots, where three percentile rank scores were compared and rank change threshold criteria applied, five Percentile Comparison Method profile types were identified, namely: 'Early Developing' (19 %); 'Later Developing' (18 %); 'Consistent' (15 %); 'Mixed' (38 %) and 'Counteracting' (10 %). Percentile Comparison Method plots helped identify developmentally (dis-)advantaged swimmers; specific factors leading to (dis-)advantage, and likely onward development trajectories. CONCLUSIONS Overall and with practical considerations, Percentile Comparison Methods can improve the validity of youth athletic performance evaluation as well as inform athlete development programming.
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Affiliation(s)
- Shaun Abbott
- Discipline of Exercise & Sport Science, Faculty of Health Sciences, The University of Sydney, Australia. https://twitter.com/ShaunAbb0tt
| | - Clorinda Hogan
- Discipline of Exercise & Sport Science, Faculty of Health Sciences, The University of Sydney, Australia
| | - Giovanni Postiglione
- Discipline of Exercise & Sport Science, Faculty of Health Sciences, The University of Sydney, Australia
| | | | - Stephen Cobley
- Discipline of Exercise & Sport Science, Faculty of Health Sciences, The University of Sydney, Australia.
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Freitas D, Antunes A, Thomis M, Silva R, Marques G, Silva A, Nunes R, Delgado M, Jardim P, Xíxaro R, Silva J, Fernandes F, Malina RM. Interrelationships among skeletal age, growth status and motor performances in female athletes 10-15 years. Ann Hum Biol 2024; 51:1-12. [PMID: 38267407 DOI: 10.1080/03014460.2023.2297733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 10/29/2023] [Indexed: 01/26/2024]
Abstract
BACKGROUND Motor performances of youth are related to growth and maturity status, among other factors. AIM To estimate the contribution of skeletal maturity status per se to the motor performances of female athletes aged 10-15 years and the mediation effects of growth status on the relationships. SUBJECTS AND METHODS Skeletal age (TW3 RUS SA), body size, proportions, estimated fat-free mass (FFM), motor performances, training history and participation motivation were assessed in 80 non-skeletally mature female participants in several sports. Hierarchical and regression-based statistical mediation analyses were used. RESULTS SA per se explained a maximum of 1.8% and 5.8% of the variance in motor performances of athletes aged 10-12 and 13-15 years, respectively, over and above that explained by covariates. Body size, proportions, and hours per week of training and participation motivation explained, respectively, a maximum of 40.7%, 18.8%, and 22.6% of the variance in performances. Mediation analysis indicated specific indirect effects of SA through stature and body mass, alone or in conjunction with FFM on performances. CONCLUSION SA per se accounted for small and non-significant amounts of variance in several motor performances of female youth athletes; rather, SA influenced performances indirectly through effects on stature, body mass and estimated FFM.
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Affiliation(s)
- Duarte Freitas
- Department of Physical Education and Sport, University of Madeira, Funchal, Portugal
- Centre of Research, Education, Innovation, and Intervention in Sport (CIFI2D), Faculty of Sport, University of Porto, Porto, Portugal
| | - António Antunes
- Department of Physical Education and Sport, University of Madeira, Funchal, Portugal
| | - Martine Thomis
- Physical Activity, Sports and Health Research Group, Department of Movement Sciences, Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Ricardo Silva
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Gonçalo Marques
- Department of Physical Education and Sport, University of Madeira, Funchal, Portugal
| | - Alípio Silva
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Rui Nunes
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Marcelo Delgado
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Paulo Jardim
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Rubina Xíxaro
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Joana Silva
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Francisco Fernandes
- Laboratory of Growth and Development, University of Madeira, Funchal, Portugal
| | - Robert M Malina
- Department of Kinesiology and Health Education, University of TX, Austin, TX, USA
- School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA
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Talbot JS, Perkins DR, Tallon CM, Dawkins TG, Douglas AJM, Beckerleg R, Crofts A, Wright ME, Davies S, Steventon JJ, Murphy K, Lord RN, Pugh CJA, Oliver JL, Lloyd RS, Ainslie PN, McManus AM, Stembridge M. Cerebral blood flow and cerebrovascular reactivity are modified by maturational stage and exercise training status during youth. Exp Physiol 2023; 108:1500-1515. [PMID: 37742137 PMCID: PMC10988468 DOI: 10.1113/ep091279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/08/2023] [Indexed: 09/25/2023]
Abstract
NEW FINDINGS What is the central question of this study? Gonadal hormones modulate cerebrovascular function while insulin-like growth factor 1 (IGF-1) facilitates exercise-mediated cerebral angiogenesis; puberty is a critical period of neurodevelopment alongside elevated gonadal hormone and IGF-1 activity: but whether exercise training across puberty enhances cerebrovascular function is unkown. What is the main finding and its importance? Cerebral blood flow is elevated in endurance trained adolescent males when compared to untrained counterparts. However, cerebrovascular reactivity to hypercapnia is faster in trained vs. untrained children, but not adolescents. Exercise-induced improvements in cerebrovascular function are attainable as early as the first decade of life. ABSTRACT Global cerebral blood flow (gCBF) and cerebrovascular reactivity to hypercapnia (CV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ ) are modulated by gonadal hormone activity, while insulin-like growth factor 1 facilitates exercise-mediated cerebral angiogenesis in adults. Whether critical periods of heightened hormonal and neural development during puberty represent an opportunity to further enhance gCBF andCV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ is currently unknown. Therefore, we used duplex ultrasound to assess gCBF andCV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ in n = 128 adolescents characterised as endurance-exercise trained (males: n = 30, females: n = 36) or untrained (males: n = 29, females: n = 33). Participants were further categorised as pre- (males: n = 35, females: n = 33) or post- (males: n = 24, females: n = 36) peak height velocity (PHV) to determine pubertal or 'maturity' status. Three-factor ANOVA was used to identify main and interaction effects of maturity status, biological sex and training status on gCBF andCV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ . Data are reported as group means (SD). Pre-PHV youth demonstrated elevated gCBF and slowerCV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ mean response times than post-PHV counterparts (both: P ≤ 0.001). gCBF was only elevated in post-PHV trained males when compared to untrained counterparts (634 (43) vs. 578 (46) ml min-1 ; P = 0.007). However,CV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ mean response time was faster in pre- (72 (20) vs. 95 (29) s; P ≤ 0.001), but not post-PHV (P = 0.721) trained youth when compared to untrained counterparts. Cardiorespiratory fitness was associated with gCBF in post-PHV youth (r2 = 0.19; P ≤ 0.001) andCV R C O 2 ${\mathrm{CV}}{{\mathrm{R}}_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$ mean response time in pre-PHV youth (r2 = 0.13; P = 0.014). Higher cardiorespiratory fitness during adolescence can elevate gCBF while exercise training during childhood primes the development of cerebrovascular function, highlighting the importance of exercise training during the early stages of life in shaping the cerebrovascular phenotype.
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Affiliation(s)
- Jack S. Talbot
- Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCardiffUK
- Centre for Health, Activity and Wellbeing ResearchCardiff Metropolitan UniversityCardiffUK
| | - Dean R. Perkins
- Department of Sport ScienceUniversity of InnsbruckInnsbruckAustria
| | - Christine M. Tallon
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise SciencesUniversity of British Columbia OkanaganKelownaCanada
| | - Tony G. Dawkins
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise SciencesUniversity of British Columbia OkanaganKelownaCanada
| | - Andrew J. M. Douglas
- Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCardiffUK
- Centre for Health, Activity and Wellbeing ResearchCardiff Metropolitan UniversityCardiffUK
| | - Ryan Beckerleg
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Andrew Crofts
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Melissa E. Wright
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Saajan Davies
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Jessica J. Steventon
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Kevin Murphy
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Physics and AstronomyCardiff UniversityCardiffUK
| | - Rachel N. Lord
- Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCardiffUK
- Centre for Health, Activity and Wellbeing ResearchCardiff Metropolitan UniversityCardiffUK
| | - Christopher J. A. Pugh
- Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCardiffUK
- Centre for Health, Activity and Wellbeing ResearchCardiff Metropolitan UniversityCardiffUK
| | - Jon L. Oliver
- Youth Physical Development CentreCardiff Metropolitan UniversityCardiffUK
- Sports Performance Research Institute New ZealandAUT UniversityAucklandNew Zealand
| | - Rhodri S. Lloyd
- Youth Physical Development CentreCardiff Metropolitan UniversityCardiffUK
- Sports Performance Research Institute New ZealandAUT UniversityAucklandNew Zealand
- Centre for Sport Science and Human PerformanceWaikato Institute of TechnologyWaikatoNew Zealand
| | - Philip N. Ainslie
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise SciencesUniversity of British Columbia OkanaganKelownaCanada
| | - Ali M. McManus
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise SciencesUniversity of British Columbia OkanaganKelownaCanada
| | - Mike Stembridge
- Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCardiffUK
- Centre for Health, Activity and Wellbeing ResearchCardiff Metropolitan UniversityCardiffUK
- Youth Physical Development CentreCardiff Metropolitan UniversityCardiffUK
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Torres-Costoso A, Zymbal V, Janz KF, Martínez Vizcaíno V, Baptista F. Body composition and musculoskeletal fitness: A cluster analysis for the identification of risk phenotypes for pediatric sarcopenia. Clin Nutr 2023; 42:1151-1158. [PMID: 37244754 DOI: 10.1016/j.clnu.2023.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/27/2023] [Accepted: 05/12/2023] [Indexed: 05/29/2023]
Abstract
BACKGROUND AND AIM Sarcopenia is primarily a disease in older people characterized by reduced muscle mass and strength. Nevertheless, sarcopenia may, at least partially, have pediatric origins. The study aimed to identify risk phenotypes for sarcopenia in healthy young people using clustering analysis procedures based on body composition and musculoskeletal fitness. METHODS We conducted a cluster cross-sectional analysis of data from 529 youth aged 10-18 yr. Body composition was assessed using whole-body dual-energy x-ray absorptiometry (DXA), determining: lean body mass index (LBMI, kg/m2), fat body mass index (FBMI, kg/m2), abdominal FBMI (kg/m2), and lean body mass/fat body mass ratio (LBM/FBM); body mass index was also calculated (BMI, kg/m2). Musculoskeletal fitness was assessed using handgrip strength (kg) and vertical jump power (W) tests. Results were presented as absolute values and adjusted by body mass. Plank endurance (s) was also assessed. All variables were sex and age in years standardized (Z-score). LBMI or LBM/FBM ratio ≤ -1 SD were used to identify participants at risk for sarcopenia. Maturity was estimated as the years of distance from the peak height velocity (PHV) age. RESULTS Using the Z-score means for body composition and musculoskeletal fitness and having LBMI or LBM/FBM ratio as the categorical variables (at risk vs. not at risk), the cluster analyses indicated three homogeneous groups (phenotypes, P): P1, risk body composition and unfit; P2, non-risk body composition and non-fit, and P3, non-risk body composition and fit. With the LBMI as a categorical variable, the ANOVA models showed that the body composition and absolute values of musculoskeletal fitness were in P1 < P2 < P3 and the estimated PHV age of P1 > P3 in both sexes (p < 0.001). Having the LBM/FBM as a categorical variable, higher values of BMI, FBMI, and abdominal FBMI, and lower values of handgrip strength and vertical jump power both adjusted for body mass and plank endurance were observed in P1 than in P2 and/or P3 and the P2 than in the P3 in boys and girls (p < 0.001). CONCLUSIONS Two risk phenotypes for sarcopenia were identified in apparently healthy young people: I. a low LBMI phenotype with low BMI and II. a low LBM to FBM phenotype with high BMI and FBMI. In both risk phenotypes I and II, musculoskeletal fitness was low. For screening, we suggest using absolute measures of handgrip strength and vertical jump power in phenotype I and body mass adjusted measures of these markers, as well as the plank endurance time in phenotype II.
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Affiliation(s)
- Ana Torres-Costoso
- Faculty of Physiotherapy and Nursing, Universidad de Castilla-La Mancha, Toledo, Spain; Health and Social Research Center, Universidad de Castilla La Mancha, Cuenca, Spain.
| | - Vera Zymbal
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal; ESS, Instituto Politécnico de Setúbal, Setúbal, Portugal
| | - Kathleen F Janz
- Department of Health and Human Physiology, Department of Epidemiology, The University of Iowa, Iowa City, USA
| | - Vicente Martínez Vizcaíno
- Health and Social Research Center, Universidad de Castilla La Mancha, Cuenca, Spain; Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
| | - Fátima Baptista
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
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Carvalho HM, Gonçalves CE. Mismatches in youth sports talent development. Front Sports Act Living 2023; 5:1189355. [PMID: 37398556 PMCID: PMC10312081 DOI: 10.3389/fspor.2023.1189355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 06/05/2023] [Indexed: 07/04/2023] Open
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Čaušević D, Rani B, Gasibat Q, Čović N, Alexe CI, Pavel SI, Burchel LO, Alexe DI. Maturity-Related Variations in Morphology, Body Composition, and Somatotype Features among Young Male Football Players. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10040721. [PMID: 37189970 DOI: 10.3390/children10040721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/17/2023]
Abstract
The study aimed to investigate differences in anthropometry, body composition (BC), and somatotype in young football players of the same chronological age according to the maturity stage. Overall, 64 elite players (age: 14.28 ± 0.46 years) were evaluated for standing and sitting body height, girth measures, and BC using the bioelectric impedance scale and skinfold thickness. In total, two-thirds (73.44%, n = 47) of football players were classified as on-time maturers, 12.50% (n = 8) were early maturing, and 14.06% (n = 9) were late maturing. Standing and sitting height, leg length, fat-free mass, and muscle mass were significantly different (p < 0.001) across maturity groups. A significant decrease (p < 0.05) with maturity progression was seen for subscapular and suprailiac skinfolds along with a girth increase at all sites (p < 0.05). Early maturers were balanced ectomorphs, while on-time and late maturers featured mesomorph-ectomorph characteristics. The obtained results suggested that mature players have better BC presented as a lower fat percentage along with higher muscle mass, advantages in circumferences, and longitudinal dimensions of the body with highlighted mesomorph features. Maturity can have a substantial influence on body measures, thereby affecting sport-specific performance. Early maturers can use their anthropometric advantages and compensate for a lack of talent, consequently preventing even participation of physically undeveloped players in training. A better understanding of maturity, BC, and somatotypes can help in the selection of young talented players.
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Affiliation(s)
- Denis Čaušević
- Faculty of Sport and Physical Education, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina
| | - Babina Rani
- Department of Physical Rehabilitation & Medicine (Physiotherapy), Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Qais Gasibat
- Department of Sports Studies, Universiti Putra Malaysia UPM, Serdang 43400, Malaysia
| | - Nedim Čović
- Faculty of Sport and Physical Education, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina
| | - Cristina Ioana Alexe
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
| | - Silviu Ioan Pavel
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
| | - Lucian Ovidiu Burchel
- Department of Environmental Sciences, Physics, Physical Education and Sports Faculty of Sciences, Lucian Blaga University in Sibiu, 550024 Sibiu, Romania
| | - Dan Iulian Alexe
- Department of Physical and Occupational Therapy, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
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Hicks DS, Drummond C, Williams KJ, van den Tillaar R. The effect of a combined sprint training intervention on sprint force-velocity characteristics in junior Australian football players. PeerJ 2023; 11:e14873. [PMID: 36941999 PMCID: PMC10024483 DOI: 10.7717/peerj.14873] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 01/19/2023] [Indexed: 03/17/2023] Open
Abstract
Background Sprint performance in junior Australian football (AF) players has been shown to be a differentiating quality in ability level therefore developing sprint characteristics via sprint-specific training methods is an important aspect of their physical development. Assisted sprint training is one training method used to enhance sprint performance yet limited information exists on its effect on sprint force-velocity characteristics. Therefore, the main aim of this study was to determine the influence of a combined sprint training intervention using assisted and maximal sprint training methods on mechanical characteristics and sprint performance in junior Australian football players. Methods Upon completing familiarization and pre-testing, twenty-two male junior Australian football (AF) players (age 14.4 ± 0.3 years, body mass 58.5 ± 10.0 kg, and height 1.74 ± 0.08 m) were divided into a combined sprint training (CST) group (n = 14), and a maximal sprint training (MST) group (n = 8) based on initial sprint performance over 20-meters. Sprint performance was assessed during maximal 20-meter sprint efforts via a radar gun (36 Hz), with velocity-time data used to derive force-velocity characteristics and split times. All subjects then completed a 7-week in-season training intervention consisting of maximal sprinting (MST & CST groups) and assisted sprinting (CST only), along with their usual football specific exercises. Results Moderate to large pre-post within group effects (-0.65 ≤ ES ≥ 0.82. p ≤ 0.01) in the CST group for relative theoretical maximal force (F0) and power (Pmax) were reflected in improved sprint performance from 0-20 m, thereby creating a more force-oriented F-v profile. The MST group displayed statistically significant pre-post differences in sprint performance between 10-20 m only (ES = 0.18, p = 0.04). Moderate to high relative reliability was achieved across all sprint variables (ICC = 0.65-0.91), except for the force-velocity slope (SFV) and decrement in ratio of forces (DRF) which reported poor reliability (ICC = 0.41-0.44), while the CST group exceeded the pre-post minimal detectable change (MDC) in most sprint variables suggesting a 'true change' in performance across the intervention. Conclusion It is concluded that implementing a short-term, combined sprint training intervention consisting of assisted and maximal sprint training methods may enhance sprint mechanical characteristics and sprint performance to 20-meters in junior AF players.
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Affiliation(s)
- Dylan Shaun Hicks
- SHAPE Research Centre, Flinders University of South Australia, Bedford Park, South Australia, Australia
| | - Claire Drummond
- SHAPE Research Centre, Flinders University of South Australia, Bedford Park, South Australia, Australia
| | - Kym J. Williams
- SHAPE Research Centre, Flinders University of South Australia, Bedford Park, South Australia, Australia
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Azzali G, Bellato M, Giuriato M, Carnevale Pellino V, Vandoni M, Ceccarelli G, Lovecchio N. Are anthropometric characteristics powerful markers to predict the Cooper Run Test? Actual Caucasian data. PeerJ 2023; 11:e15271. [PMID: 37101790 PMCID: PMC10124560 DOI: 10.7717/peerj.15271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 03/30/2023] [Indexed: 04/28/2023] Open
Abstract
Background Cardiorespiratory fitness (CRF) is a powerful marker of cardiovascular health, especially in youth. Several field tests can provide accurate measurement of CRF, the Cooper Run Test (CRT) is generally preferred by physical education (PE) teachers and trainers. The CRT performance in adolescents has been compared to reference distance values, gender and age but the differences among the anthropometric characteristics of youth has not been evaluated. For these reasons, the aim of this study was to develop reference standards for CRT and evaluate possible correlations between biometric measurements and athletic performance. Methods This cross-sectional study involved a total of 9,477 children (4,615 girls) aged 11-14 years, freely recruited from North Italian middle schools. Mass, height and CRT performances were assessed in the morning during PE classes as scheduled (mornings-Monday to Friday). The anthropometric measures were collected at least 20 min before the CRT run test. Results We found a better CRT result in boys (p < 0.001), however a smaller SD in girls suggested a more homogeneous aerobic performance for girls (i.e., 371.12 m vs 282.00 m). In addition, the Shapiro-Wilk test showed a low p-value (p < 0.001) but the effect size (0.031 for boys and 0.022 for girls) was small enough that the correction on this parameter allows a practical assumption of normality for the distributions. A visual homoskedastic distribution in both sexes is evident for both body mass index (BMI), mass and VO2 peak with respect to CRT results. In addition, there were low linear correlation coefficients for both BMI, mass and VO2 peak compared to the CRT results, with a R2 < 0.5 for every covariate. The only visual heteroskedastic distribution was observed in regression between distance in CRT and age at peak high velocity. Conclusions Our findings suggested that anthropometric characteristics are not powerful markers to predict Cooper Run Test results in a well-mixed, unpolarized and unbiased pool of middle school boys and girls. PE teachers and trainers should prefer endurance tests over the use of indirect formulas to predict performance.
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Affiliation(s)
- Gianluca Azzali
- Human Anatomy Unit, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
| | - Massimo Bellato
- Department of Information Engineering, University of Padua, Padua, Italy
| | - Matteo Giuriato
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental Medicine and Forensic Science, University of Pavia, Pavia, Italy
| | - Vittoria Carnevale Pellino
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental Medicine and Forensic Science, University of Pavia, Pavia, Italy
- Department of Industrial Engineering, University of Roma “Tor Vergata”, Rome, Italy
| | - Matteo Vandoni
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental Medicine and Forensic Science, University of Pavia, Pavia, Italy
| | - Gabriele Ceccarelli
- Human Anatomy Unit, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
| | - Nicola Lovecchio
- Department of Human and Social Science, University of Bergamo, Bergamo, Italy
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10
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Hogan C, Abbott S, Halaki M, Torres Castiglioni M, Yamauchi G, Mitchell L, Salter J, Romann M, Cobley S. Maturation-based Corrective Adjustment Procedures (Mat-CAPs) in youth swimming: Evidence for restricted age-group application in females. PLoS One 2022; 17:e0275797. [PMID: 36206228 PMCID: PMC9543692 DOI: 10.1371/journal.pone.0275797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 09/23/2022] [Indexed: 11/05/2022] Open
Abstract
Inter-individual differences in maturation-associated development can lead to variations in physical performance, resulting in performance (dis)advantages and maturation selection bias within youth sport systems. To address such bias and account for maturational differences, Maturation-based Corrective Adjustment Procedures (Mat-CAPs) could be beneficial. The present study aimed to: (1) determine maturity timing distributions in youth female swimming; (2) quantify the relationship between maturation status and 100-m front-crawl (FC) performance; (3) implement Mat-CAPs to remove maturational influences upon swimming performance. For Aim 1 and 2, participants were 663 female (10–15 years) swimmers who participated in 100-m FC events at Australian regional, state, and national-level competitions between 2016–2020 and underwent anthropometric assessment (mass, height and sitting height) to estimate maturity timing and offset. For Aim 3, participants aged 10–13 years were categorised into maturity timing categories. Maturity timing distributions for Raw (‘All’, ‘Top 50%’ and ‘Top 25%’) and Correctively Adjusted swim times were examined. Chi-square, Cramer’s V and Odds Ratios determined the presence of maturation biases, while Mat-CAPs identified whether such biases were removed in targeted age and selection-groups. Results identified that between 10–13 years, a significantly higher frequency of ‘early’ maturers was apparent, although tapered toward higher frequencies of ‘Late-normative’ maturers by 14–15 years. A curvilinear relationship between maturity-offset and swim performance was identified (R2= 0.51, p<0.001) and utilised for Mat-CAPs. Following Mat-CAPs application, maturity timing biases evident in affected age-groups (10–13 years), and which were magnified at higher selection levels (‘Top 50%’ & ‘25%’ of swim performances) were predominantly removed. Findings highlight how maturation advantages in females occurred until approximately 13 years old, warranting restricted Mat-CAPs application. Mat-CAPS has the potential to improve female swimmer participation experiences and evaluation.
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Affiliation(s)
- Clorinda Hogan
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Shaun Abbott
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Mark Halaki
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Marcela Torres Castiglioni
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Goshi Yamauchi
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
| | | | - James Salter
- Swimming Australia Limited, Sunnybank, Queensland, Australia
| | - Michael Romann
- Swiss Federal Institute of Sport Magglingen, Magglingen, Switzerland
| | - Stephen Cobley
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Camperdown, New South Wales, Australia
- * E-mail:
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11
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Magalhães KCS, Matias TS, Araujo RH, Werneck AO, Ferrari G, Luz LGO, Fernandes RA, Barbosa DS, Ronque ERV, Cyrino ES, Silva DR. Clusters of obesogenic behaviors and metabolic risk according to somatic maturity status among adolescents. Am J Hum Biol 2022; 34:e23778. [PMID: 35792678 DOI: 10.1002/ajhb.23778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/10/2022] [Accepted: 06/21/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVE This study aimed to identify the clusters of obesogenic behaviors, and verify the association with metabolic risk according to the categories of somatic maturity status of adolescents. METHODS This is a cross-sectional study conducted with 1159 (55.1% girls) Brazilian adolescents aged between 10 and 16 years (mean age: 12.9 years). Measurements of waist circumference, blood pressure, blood glucose, HDL-C, and triglycerides were combined to calculate a metabolic risk score. Somatic maturity was assessed by estimating the peak of height velocity. The obesogenic behaviors analyzed were physical activity (Baecke questionnaire), sedentary behavior (screen-based behaviors) and dietary habits (consumption of healthy and unhealthy food). The Two Step clustering algorithm using the log-likelihood measure was employed to cluster formation and regression models were adopted to the main analysis. RESULTS We observed a complex co-existence of obesogenic behaviors. Differences regarding the metabolic risk between clusters was only observed among the early-maturing adolescents, where the cluster with higher number of healthy behaviors but lower physical activity presented higher metabolic risk score. CONCLUSIONS We conclude that physical activity has an important role on the association of clusters of obesogenic behaviors and metabolic risk in early-maturing adolescents.
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Affiliation(s)
| | - Thiago S Matias
- Department of Physical Education, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Raphael H Araujo
- Graduate Program in Health Sciences, State University of Londrina, Londrina, Brazil
| | - André O Werneck
- Center for Epidemiological Research in Nutrition and Health, Department of Nutrition, School of Public Health, Universidade de São Paulo (USP), São Paulo, Brazil
| | - Gerson Ferrari
- Laboratorio de Rendimiento Humano, Grupo de Estudio en Educación, Actividad Física y Salud (GEEAFyS), Universidad Católica del Maule, Talca, Chile
| | - Leonardo G O Luz
- LACAPS, Federal University of Alagoas, Arapiraca, Brazil; and CIDAF, University of Coimbra, Coimbra, Portugal
| | - Rômulo A Fernandes
- Department of Physical Education, São Paulo State University, Sao Paulo, Brazil
| | - Décio S Barbosa
- Graduate Program in Health Sciences, State University of Londrina, Londrina, Brazil
| | - Enio R V Ronque
- Department of Physical Education, State University of Londrina, Londrina, Brazil
| | - Edilson S Cyrino
- Graduate Program in Health Sciences, State University of Londrina, Londrina, Brazil.,Department of Physical Education, State University of Londrina, Londrina, Brazil
| | - Danilo R Silva
- Graduate Program in Health Sciences, State University of Londrina, Londrina, Brazil.,Department of Physical Education, Federal University of Sergipe, Sao Cristovao, Brazil
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12
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Costa DC, Valente-Dos-Santos J, Sousa-E-Silva P, Martinho DV, Duarte JP, Tavares OM, Castanheira JM, Oliveira TG, Abreu S, Leite N, Agostinete RR, Fernandes RA, Courteix D, Coelho-E-Silva MJ. Growth, body composition and bone mineral density among pubertal male athletes: intra-individual 12-month changes and comparisons between soccer players and swimmers. BMC Pediatr 2022; 22:275. [PMID: 35562680 PMCID: PMC9102354 DOI: 10.1186/s12887-022-03321-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
Background Puberty is a period of intense changes in human body and, additionally, participation in sports is viewed as prominent form of physical activity among male adolescent athletes. The current study was aimed to examine the intra-individual changes in body composition and bone tissue during years of maximal growth and the effect of 12-month participation in sports contrasting in mechanical impact. Methods The sample included 40 male adolescent athletes (soccer: n = 20; swimming: n = 20) aged 12.57 ± 0.37 years who were followed for 12 months. Stature and body mass were measured, bone mineral content (BMC), areal bone mineral density (aBMD), lean soft and fat tissues assessed using DXA. Food intake was estimated using a questionnaires and training sessions individually monitored. Repeated measures ANOVA tested the differences between sports and 12-month intra-individual variation (time moments: TM1, TM2). The analyses on aBMD for total body and total body less head were repeated controlling for variation in stature at baseline. Results Soccer players completed 63 ± 31 sessions (95 ± 47 h). Respective values for swimmers were 248 ± 28 sessions and 390 ± 56 h. In general, the analysis of aBMD as dependent variable evidenced significant effect of sport-associated variation (F = 5.254, p < 0.01; η2 = 0.35) and 12-month increments, particularly at lower limbs (F = 97.238, p < 0.01; η2 = 0.85). Respective mean values for aBMD were SCCTM1 = 0.885 g.cm−2, SWMTM1 = 0.847 g.cm−2, SCCTM2 = 0.939 g.cm−2, SWMTM2 = 0.880. Regarding the lean soft tissue, the magnitude of effects was very large for intra-individual variation (F = 223.043, p < 0.01; η2 = 0.92) and moderate between sports (F = 7.850, p < 0.01; η2 = 0.41): SCCTM1 = 30.6 kg, SWMTM1 = 34.9 kg, SCCTM2 = 35.8 kg, SWMTM2 = 40.5 kg). Finally, d-cohen values reporting percentage of intra-individual changes in aBMD between soccer players ad swimmers were large for the trochanter (d = 1.2; annual increments: SCC = 8.1%, SWM = 3.6%). Conclusion Puberty appeared as a period of significant intra-individual changes in lean soft tissue and bone mineral density. With increasing accumulated training experience, mean difference between sports contrasting in mechanical impact tended to me more pronounced in particular at the lower limbs. Supplementary Information The online version contains supplementary material available at 10.1186/s12887-022-03321-2.
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Affiliation(s)
- Daniela C Costa
- University of Coimbra, FCDEF, Coimbra, Portugal.,CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal
| | - João Valente-Dos-Santos
- CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal.,Lusophone University of Humanities and Technologies, CIDEFES, Lisbon, Portugal
| | - Paulo Sousa-E-Silva
- University of Coimbra, FCDEF, Coimbra, Portugal.,CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal
| | - Diogo V Martinho
- University of Coimbra, FCDEF, Coimbra, Portugal.,CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal
| | - João P Duarte
- University of Coimbra, FCDEF, Coimbra, Portugal.,CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal
| | - Oscar M Tavares
- Polytechnic Institute of Coimbra, Coimbra Health School, Coimbra, Portugal
| | - Joaquim M Castanheira
- CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal.,Polytechnic Institute of Coimbra, Coimbra Health School, Coimbra, Portugal
| | - Tomás G Oliveira
- CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal
| | | | - Neiva Leite
- Department of Physical Education, Federal University of Parana, Curitiba, PR, Brazil
| | - Ricardo R Agostinete
- Department of Physical Education, Laboratory of InVestigation in Exercise (LIVE), Sao Paulo State University (UNESP), Presidente Prudente, Brazil
| | - Rômulo A Fernandes
- Department of Physical Education, Laboratory of InVestigation in Exercise (LIVE), Sao Paulo State University (UNESP), Presidente Prudente, Brazil
| | - Daniel Courteix
- Laboratory AME2P, University of Clermont Auvergne, Clermont-Ferrand, France
| | - Manuel J Coelho-E-Silva
- University of Coimbra, FCDEF, Coimbra, Portugal. .,CIDAF (uid/dtp/04213/2020), University of Coimbra, Coimbra, Portugal. .,Estadio Universitario, Pavilhao III, 3040-248, Coimbra, Portugal.
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13
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Estimating Growth in Height from Limited Longitudinal Growth Data Using Full-Curves Training Dataset: A Comparison of Two Procedures of Curve Optimization-Functional Principal Component Analysis and SITAR. CHILDREN-BASEL 2021; 8:children8100934. [PMID: 34682199 PMCID: PMC8535004 DOI: 10.3390/children8100934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/04/2021] [Accepted: 10/13/2021] [Indexed: 11/17/2022]
Abstract
A variety of models are available for the estimation of parameters of the human growth curve. Several have been widely and successfully used with longitudinal data that are reasonably complete. On the other hand, the modeling of data for a limited number of observation points is problematic and requires the interpolation of the interval between points and often an extrapolation of the growth trajectory beyond the range of empirical limits (prediction). This study tested a new approach for fitting a relatively limited number of longitudinal data using the normal variation of human empirical growth curves. First, functional principal components analysis was done for curve phase and amplitude using complete and dense data sets for a reference sample (Brno Growth Study). Subsequently, artificial curves were generated with a combination of 12 of the principal components and applied for fitting to the newly analyzed data with the Levenberg–Marquardt optimization algorithm. The approach was tested on seven 5-points/year longitudinal data samples of adolescents extracted from the reference sample. The samples differed in their distance from the mean age at peak velocity for the sample and were tested by a permutation leave-one-out approach. The results indicated the potential of this method for growth modeling as a user-friendly application for practical applications in pediatrics, auxology and youth sport.
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14
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Malina RM, Coelho-e-Silva MJ, Martinho DV, Sousa-e-Siva P, Figueiredo AJ, Cumming SP, Králík M, Kozieł SM. Observed and predicted ages at peak height velocity in soccer players. PLoS One 2021; 16:e0254659. [PMID: 34310636 PMCID: PMC8312932 DOI: 10.1371/journal.pone.0254659] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/30/2021] [Indexed: 11/24/2022] Open
Abstract
The purpose of the study was to evaluate predicted maturity offset (time before age at PHV) and age at PHV (chronological age [CA] minus maturity offset) in a longitudinal sample of 58 under-13 club level soccer players in central Portugal for whom ages at PHV were estimated with the SITAR model. Two maturity offset prediction equations were applied: the original equation which requires CA sitting height, estimated leg length, height and weight, and a modified equation which requires CA and height. Predicted maturity offset increased, on average, with CA at prediction throughout the age range considered, while variation in predicted maturity offset and ages at PHV within CA groups was considerably reduced compared to variation in observed ages at offset and at PHV. Predicted maturity offset and ages at PHV were consistently later than observed maturity offset and age at PHV among early maturing players, and earlier than observed in late maturing players. Both predicted offset and ages at PHV with the two equations were, on average, later than observed among players maturing on time. Intra-individual variation in predicted ages at PHV with each equation was considerable. The results for soccer players were consistent with similar studies in the general population and two recent longitudinal studies of soccer players. The results question the utility of predicted maturity offset and age at PHV as valid indicators of maturity timing and status.
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Affiliation(s)
- Robert M. Malina
- Department of Kinesiology and Health Education, University of Texas, Austin, Texas, United States of America
- University of Louisville, School of Public Health and Information Sciences, Louisville, Kentucky, United States of America
| | - Manuel J. Coelho-e-Silva
- University of Coimbra, FCDEF, Coimbra, Portugal
- University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | - Diogo V. Martinho
- University of Coimbra, FCDEF, Coimbra, Portugal
- University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | - Paulo Sousa-e-Siva
- University of Coimbra, FCDEF, Coimbra, Portugal
- University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | - Antonio J. Figueiredo
- University of Coimbra, FCDEF, Coimbra, Portugal
- University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | - Sean P. Cumming
- Department of Health, University of Bath, Bath, United Kingdom
| | - Miroslav Králík
- Faculty of Science, Department of Anthropology, Masaryk University, Brno, Czech Republic
| | - Sławomir M. Kozieł
- Department of Anthropology, Polish Academy of Sciences, Hirszfeld Institute of Immunology and Experimental Therapy, Wrocław, Poland
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15
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Malina RM, Martinho DV, Valente-dos-Santos J, Coelho-e-Silva MJ, Kozieł SM. Growth and Maturity Status of Female Soccer Players: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:1448. [PMID: 33557121 PMCID: PMC7913875 DOI: 10.3390/ijerph18041448] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 12/20/2022]
Abstract
Reported mean ages, heights and weights of female soccer players aged <19 years in 161 studies spanning the years 1992-2020 were extracted from the literature or calculated from data available to the authors; 35 studies spanning the years 1981-2020 also included an indicator of biological maturation. Heights and weights were plotted relative to U.S. reference data. Preece-Baines Model 1 was fitted to moving averages to estimate ages at peak velocity. Maturity indicators included skeletal age, pubertal status, age at menarche, percentage of predicted adult height and predicted maturity offset. Heights and weights showed negligible secular variation across the time interval. Heights were slightly above or approximated the reference medians through 14 years old and then varied between the medians and 75th percentiles through 18 years old. Weights were above the reference medians from 9 to 18 years old. Mean ages at menarche ranged from 12.7 to 13.0 years. The trend in heights and weights suggested the persistence and/or selection of taller and heavier players during adolescence, while estimated age at peak height velocity (PHV) and ages at menarche were within the range of mean ages in European and North American samples. Data for skeletal and sexual maturity status were limited; predicted maturity offset increased linearly with mean ages and heights at prediction.
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Affiliation(s)
- Robert M. Malina
- Department of Kinesiology and Health Education, University of Texas, Austin, TX 78712, USA
- School of Public Health and Information Sciences, University of Louisville, Louisville, KY 40292, USA
| | - Diogo V. Martinho
- University of Coimbra, FCDEF, CIDAF (uid/dtp/042143/2020), 3040-248 Coimbra, Portugal; (D.V.M.); (M.J.C.-e.-S.)
| | - João Valente-dos-Santos
- Faculty of Physical Education and Sport, Lusófona University, 1749-024 Lisbon, Portugal;
- Faculty of Sports Science and Physical Education, University of Coimbra, CIDAF (uid/dtp/042143/2020), 3040-248 Coimbra, Portugal
| | - Manuel J. Coelho-e-Silva
- University of Coimbra, FCDEF, CIDAF (uid/dtp/042143/2020), 3040-248 Coimbra, Portugal; (D.V.M.); (M.J.C.-e.-S.)
| | - Sławomir M. Kozieł
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland;
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