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Lindholm O, Niklasson E, Lind J, Cardinale DA, Lundberg TR. A pilot study on bio-banding in male youth ice hockey: Players' perceptions and coaches' selection preferences. PLoS One 2024; 19:e0308676. [PMID: 39133685 PMCID: PMC11318913 DOI: 10.1371/journal.pone.0308676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 07/29/2024] [Indexed: 08/15/2024] Open
Abstract
Classifying athletes based on estimates of biological maturation (i.e., bio-banding) as a supplement to traditional age grouping has been shown to be a potential tool for enriching player development in team sports; however, bio-banding has not yet been evaluated in ice hockey. The primary aim was to investigate player experiences and coaches' selection preferences in bio-banding versus age-banding in a group of 12-13-year-old (early growth spurt) male elite players (n = 69). We also examined the relationship between somatic maturity, expressed as a % predicted adult height (%PAH), and fitness performance. Bio-banding was assessed using a questionnaire and 29 coaches selected their top players in each game based on age or bio-bands. %PAH correlated with grip strength (r = .57, p>0.001) and jumping power (r = .63, p<0.001), but not with vertical jump height, sprint time or endurance. Players who played against more mature players in bio-bands than in age groups experienced higher demands, while players who played against less mature players were able to utilize their skills to a greater extent. Coaches generally favored later-than-average maturing players who performed better on performance tests and chronologically older players in bio-banding. We conclude that bio-banding in youth ice hockey has some promising effects and warrants further evaluation.
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Affiliation(s)
- Oliver Lindholm
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Erik Niklasson
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Centre for Physical Activity Research, Copenhagen University Hospital—Rigshospitalet, Copenhagen, Denmark
| | - John Lind
- Swedish Ice Hockey Association, Stockholm, Sweden
| | - Daniele A. Cardinale
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences (GIH), Stockholm, Sweden
- The Swedish Sports Confederation (Riksidrottsförbundet), Stockholm, Sweden
| | - Tommy R. Lundberg
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
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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; 27:422-429. [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] [MESH Headings] [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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Robinson J, Cumming S, Salter J, Toner J, Towlson C. A new method to identify key match-play behaviours of young soccer players: Development of the Hull Soccer Behavioural Scoring Tool. PLoS One 2024; 19:e0295953. [PMID: 38457396 PMCID: PMC10923421 DOI: 10.1371/journal.pone.0295953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 11/29/2023] [Indexed: 03/10/2024] Open
Abstract
The aim of this research was to assess the validity and reliability of a newly developed scoring tool, designed for monitoring youth soccer players during match-play performance to support coaches/scouts with the talent identification process. The method used to design the Hull Soccer Behavioural Scoring Tool comprised of a five-stage process of (i) conducting an initial literature review to establish content validity (ii) gaining content validity through a cross sectional online survey (iii) establishing face validity via expert coach feedback (iv) conducting inter-rater reliability tests and (v) intra-rater reliability tests. In stage two, twenty-two soccer academy practitioners completed an online survey, which revealed that player behaviours such as resilience, competitiveness, and decision making were all valued as the most important behavioural characteristics by practitioners (90.9%), whilst X-factor was valued as least important by a significant amount (27.2%). Stages three to five of the testing procedure included a sample of four academy coaches not involved in the preceding stage. Twenty male collegiate soccer players (under-16 to under-18) involved in the study took part in four versus four small-sided games (SSG) in a 'round-robin' tournament across three weeks which accumulated 14 SSG's, 100-140 minutes of playing time and 70-98 individual player grades. Two of the four academy coaches watched the SSG's and used the Hull Soccer Behavioural Scoring Tool to assess live evidence of desirable player behaviours, which was subsequently followed by retrospective video analysis for intra-rater reliability testing. The remaining two academy coaches watched the same SSG retrospective video footage to test for inter-rater reliability. Reliability results revealed an acceptable level of agreement with scores between 81.25%-89.9% for inter-rater whilst intra-rater provided scores between 80.35%-99.4%. Preliminary evidence here suggests that the Hull Soccer Behavioural Scoring Tool is both a valid and reliable method to assess desirable player behaviours during talent identification processes. Thus, youth soccer practitioners and researchers should seek to test and further validate the tool in order to confirm its utility as a means of measuring behavioural characteristics of youth soccer players.
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Affiliation(s)
- James Robinson
- University of Hull, School of Sport, Exercise and Rehabilitation Sciences, Hull, United Kingdom
| | - Sean Cumming
- Department for Health, University of Bath, Bath, United Kingdom
| | - Jamie Salter
- York St John University, School of Science, Technology and Health, York, United Kingdom
| | - John Toner
- University of Hull, School of Sport, Exercise and Rehabilitation Sciences, Hull, United Kingdom
| | - Chris Towlson
- University of Hull, School of Sport, Exercise and Rehabilitation Sciences, Hull, United Kingdom
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Post AK, Koning RH, Visscher C, Elferink-Gemser MT. Growing up and reaching for the top: A longitudinal study on swim performance and its underlying characteristics in talented swimmers. J Sports Sci 2024; 42:132-145. [PMID: 38412227 DOI: 10.1080/02640414.2024.2322253] [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: 08/29/2023] [Accepted: 02/14/2024] [Indexed: 02/29/2024]
Abstract
The present study strived to gain a more profound understanding of the distinctions in development between swimmers who are considered to be on track to the elite level at late junior age (males aged 16; females aged 15) compared to those who are not. In this effort, swimmers were followed during their pubertal years (males aged 13-15; females aged 12-14), which marks a period when performance development aligns with maturation. Longitudinal data of 90 talented sprint and middle-distance swimmers on season best times (SBT) and underlying performance characteristics (anthropometrics, maximal swimming velocity, stroke index [SI] and countermovement jump [CMJ]) were collected over three swimming seasons. Based on their SBT at late junior age (males aged 16; females aged 15), swimmers were classified as high-performing late juniors or lower-performing late juniors. Retrospectively studying these swimmers, we found that all but two high-performing late juniors were already on track to the elite level at early junior age (males aged 13; females aged 12), evidenced with faster SBT throughout puberty compared to their lower-performing peers (p < 0.05). Independent sample t-tests revealed that high-performing late juniors significantly outscored their lower-performing peers when they were early juniors on maximal swimming velocity (males aged 13-15 and females aged 12-14), SI (males aged 13 and 14; females aged 12), CMJ (females aged 14) and height (females aged 13 and 14, p < 0.05). Additionally, multilevel models showed faster rates of development for high-performing late juniors on maximal swimming velocity (males and females) and SI (males) compared to lower-performing peers throughout puberty (p < 0.05). Higher initial levels of SBT and underlying performance characteristics at early junior age as well as the faster rates of development on SBT, maximal swimming velocity and SI (males only) during the pubertal years, may be crucial factors in maintaining the trajectory towards the elite level after puberty.
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Affiliation(s)
- Aylin Kim Post
- Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Ruud Hans Koning
- Department of Economics, Econometrics & Finance, Faculty of Economics and Business, University of Groningen, Groningen, The Netherlands
| | - Chris Visscher
- Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Marije Titia Elferink-Gemser
- Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Bolckmans S, Perquy K, Starkes JL, Memmert D, Helsen WF. The relationships between relative age effect, personality constructs and achievement level in soccer. Front Sports Act Living 2023; 5:1226599. [PMID: 38022782 PMCID: PMC10667700 DOI: 10.3389/fspor.2023.1226599] [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: 05/21/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Youth soccer academies are challenged with the constant recruitment process of young talented players to select those who will achieve long-term success as an athlete. Youth soccer academies strive to enhance the physical and technical skill development as well as personality development of talented players because psychological characteristics play a crucial role in players' future success in their transition to professional soccer. The least mature players and relatively young players may have a greater need to possess superior technical/tactical or psycho-behavioral skills than those relatively older counterparts because of the higher selection rates of early maturing players. Due to RAEs, a significant decrease in the overall quality of professional soccer teams might be observed because of the loss of talent of physically smaller, but psychologically stronger and more versatile relatively young players who possess proper technical and tactical attributes at an early age. The first objective of this study was to examine any possible relationship between RAE and personality constructs. A second objective was to identify factors and effects that can help in the further improvement of talent selection and equal opportunities for elite youth soccer players based on their underlying RAE. The third objective was to consider the impact of RAE on long-term career development. Methods In this retrospective observational study, 151 elite youth soccer players between 15 and 18 years of age were first grouped in birth quartiles. Personality constructs were then assessed, using a combination of observations, interviews, and a self-assessment questionnaire. Next competition level after 8 years was evaluated to identify RAEs, differences in personality characteristics and opportunities to reach professional soccer player status between relatively older vs. younger players. Results A clear significant RAE was observed for the whole database (Q1 = 38.4% vs. Q4 = 13.9%) with OR of 2.61 (χ2 = 19.46, p < 0.01, r = -0.85). Relatively young players had higher median scores on personality constructs such as self-confidence (p = 0.04), while relatively old players had higher median scores on personality constructs such as team orientation (p = 0.03). In the long term, more players of the youngest birth quartile were signed as professional players (76.2%), compared with relatively old players (46.6%). 65.0% of the 20 players had the highest total score on personality constructs developed as a professional soccer player, vs. 35.0% of the 20 players with the lowest scores. Discussion In conclusion, this study showed not only further evidence of the RAE but also provided evidence supporting "the underdog hypothesis" in national elite youth teams. Relatively young players were also more likely to get higher value senior professional contracts in the long term. We propose that this may be due to the relatively young players developing superior psychological skills and technical expertise to compensate for their early physical disadvantage. This in turn suggests the need for greater awareness of the importance of personality constructs in the future development of youth elite soccer players. Therefore, the crux of the issue is how youth soccer academies elicit the "best of both worlds" ie. moderating RAE whilst also gaining the benefits of the underdog hypothesis by creating the right environment for every player to develop to their full potential in elite youth soccer academies.
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Affiliation(s)
- Sofie Bolckmans
- Institute of Exercise Training and Sport Informatics, German Sport University Cologne, Cologne, Germany
| | - Kris Perquy
- Sport Consultancy MP Mental Coaching in Topsport, Sport and Performance Psychologist RBFA, Tubize, Belgium
| | - Janet L. Starkes
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Daniel Memmert
- Institute of Exercise Training and Sport Informatics, German Sport University Cologne, Cologne, Germany
| | - Werner F. Helsen
- Institute of Exercise Training and Sport Informatics, German Sport University Cologne, Cologne, Germany
- Department of Movement Sciences, KU Leuven, Leuven, Belgium
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Lolli L, Gregson W, Bonanno D, Kuitunen S, Di Salvo V. Age-Related Reference Intervals for Physical Performance Test Outcomes Relevant to Male Youth Middle Eastern Football Players. Int J Sports Physiol Perform 2023; 18:1283-1295. [PMID: 37604482 DOI: 10.1123/ijspp.2023-0145] [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: 04/12/2023] [Revised: 07/05/2023] [Accepted: 07/13/2023] [Indexed: 08/23/2023]
Abstract
PURPOSE To develop age-specific reference intervals for physical performance test outcomes relevant to male youth Middle Eastern football players. METHODS We analyzed mixed-longitudinal data (observations range: 1751-1943 assessments) from a sample of 441 male youth outfield football players (chronological age range: 11.7-18.4 y) as part of the Qatar Football Association and Aspire Academy development program over 14 competitive seasons. Semiparametric generalized additive models for location, scale, and shape estimated age-specific reference centiles for 10-m sprinting, 40-m sprinting, countermovement jump height, and maximal aerobic speed variables. RESULTS The estimated reference intervals indicated that the distribution of the physical performance test scores increased monotonically and nonlinearly with advancing chronological age for sprinting and countermovement jump outcome measures, reaching a plateau after 16 years common to each of these performance variables. The maximal aerobic speed median score increased substantially until ∼14.5 years, with the nonlinear trend flattening off toward relatively older chronological ages. CONCLUSIONS We developed age-related reference intervals for physical performance test outcomes relevant to youth Qatari football players. Country-wide age-specific reference intervals can assist in the longitudinal tracking of the individual players' progress over time against benchmark values derived from the reference population.
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Affiliation(s)
- Lorenzo Lolli
- Football Performance & Science Department, Aspire Academy, Doha,Qatar
- Department of Sport and Exercise Sciences, Institute of Sport, Manchester Metropolitan University, Manchester,UK
| | - Warren Gregson
- Department of Sport and Exercise Sciences, Institute of Sport, Manchester Metropolitan University, Manchester,UK
| | - Daniele Bonanno
- Football Performance & Science Department, Aspire Academy, Doha,Qatar
| | - Sami Kuitunen
- Football Performance & Science Department, Aspire Academy, Doha,Qatar
| | - Valter Di Salvo
- Football Performance & Science Department, Aspire Academy, Doha,Qatar
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico,"Rome,Italy
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Kalčíková P, Přidalová M. The Influence of Somatic Maturity on Anthropometrics and Body Composition in Youth Soccer Players. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1732. [PMID: 38002823 PMCID: PMC10670197 DOI: 10.3390/children10111732] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 10/21/2023] [Accepted: 10/24/2023] [Indexed: 11/26/2023]
Abstract
The primary aim of this investigation was to compare players' anthropometric (AP) and body composition (BC) characteristics between distinct maturity bands (pre-PHV, circa-PHV, post-PHV) in youth elite soccer. This study considered 320 male soccer players (mean age 13.8 y). Participants were from U14 (n = 157) and U15 (n = 163) age categories. The Khamis-Roche method was applied to calculate the percentage of predicted adult height (PAH) at the time of assessment based on which the players were further divided into maturity bands (pre-PHV ≤ 87%, circa-PHV = 88-95%, post-PHV > 95%). The findings indicated that most of the players were in the circa-PHV stage at the time of investigation. Measurements included height and weight. The estimates of BC parameters were derived using bioelectrical impedance (BIA) analysis. These various AP and BC attributes displayed significant differences among the maturity bands (F = 139.344-7.925; p < 0.001; large effect sizes) except in body fat mass (BFM) (F = 2.998; p = 0.051; small effect size). The current somatic maturity stage of the athletes should be considered when evaluating BC results, otherwise there is a risk of misinterpretation.
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Affiliation(s)
- Pavlína Kalčíková
- Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Křížkovského 511/8, CZ-779 00 Olomouc, Czech Republic;
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9
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Arenas L, Frenger M, Skorski S, Meyer T. Survey of the current practices of German football academies towards biological maturation assessment. SCI MED FOOTBALL 2023:1-14. [PMID: 37840319 DOI: 10.1080/24733938.2023.2270563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES This study aimed to examine the importance assigned to assessing and considering biological maturation in thematic areas of player development and provide an overview of current practices in German football academies regarding its consideration in training and competition. METHODS An online survey was sent to 56 elite German football academies. A total of 46 responded to the questionnaire (82% response rate). Six participants provided incomplete information resulting in a total of 40 completed surveys in the period from March to May 2022. RESULTS Only 20 of participants regularly carried out maturation assessments, despite 95% recognizing its importance for load management, 90% for player development, and 85% for injury prevention. There was no consistent approach to modifying training and competition formats based on maturity status, with a primary focus on gym-based sessions for load management. CONCLUSION The survey results highlight limited implementation of maturation assessment and training modification based on maturity status in German elite youth football academies. Despite recognizing the importance of load monitoring, reporting to parents, and long-term player development in considering biological maturation, practices are not widespread. The predominant use of the maturity offset method suggests an opportunity to improve accuracy by exploring alternative measurement methods and increasing assessment frequency. Moreover, a lack of established procedures for incorporating maturity status into training and competition exists, hindering comprehensive consideration of biological maturation and injury risk prevention. Further research is needed to understand the reasons for inconsistent approaches in maturation assessment and load modification during training and competition.
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Affiliation(s)
- Lukas Arenas
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Monika Frenger
- Department Economics and Sociology of Sport, Saarland University, Saarbrücken, Germany
| | - Sabrina Skorski
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Tim Meyer
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
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Sullivan J, Roberts SJ, Mckeown J, Littlewood M, McLaren-Towlson C, Andrew M, Enright K. Methods to predict the timing and status of biological maturation in male adolescent soccer players: A narrative systematic review. PLoS One 2023; 18:e0286768. [PMID: 37682962 PMCID: PMC10490883 DOI: 10.1371/journal.pone.0286768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/22/2023] [Indexed: 09/10/2023] Open
Abstract
The aim of this review was to summarise the methods used to predict and assess maturity status and timing in adolescent, male, academy soccer players. A systematic search was conducted on PubMed, Scopus, Web of Science, CINAHL, Medline and SPORTDiscus. Only experimental studies including male, academy players aged U9-U18 years registered with a professional soccer club were included. The methodological quality of the included studies was assessed using guidelines from the Framework of Potential Biases. Fifteen studies fulfilled our inclusion criteria. Studies were mainly conducted in European countries (n = 12). In total, 4,707 players were recruited across all 15 studies, with an age range of 8-18 years. Five studies were longitudinal, two studies were mixed-method designs and eight studies were cross-sectional. Due to high heterogeneity within the studies, a meta-analysis was not performed. Our findings provided no equivalent estimations of adult height, skeletal age, or age at PHV. Discrepancies were evident between actual and predicted adult height and age at PHV. The Bayley-Pinneau [1952], Tanner-Whitehouse 2 [1983] and Khamis-Roche [1994] methods produced estimates of adult height within 1cm of actual adult height. For age at PHV, both Moore [2015] equations produced the closest estimates to actual age at PHV, and the Fransen [2018] equation correlated highly with actual age at PHV (>90%), even when the period between chronological age and age at PHV was large. Medical imaging techniques (e.g., Magnetic Resonance Imaging, X-Ray, Dual energy X-ray Absorptiometry) demonstrated high intra/inter-rater reliability (ICC = 0.83-0.98) for skeletal maturity assessments. The poor concordance between invasive and non-invasive methods, is a warning to practitioners to not use these methods interchangeably for assessing maturational status and timing in academy soccer players. Further research with improved study designs is required to validate these results and improve our understanding of these methods when applied in this target population.
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Affiliation(s)
- Joseph Sullivan
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
- Trauma and Orthopedics Department, Broadgreen Hospital, Thomas Drive, Liverpool, United Kingdom
| | - Simon J. Roberts
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
- The Football Exchange, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
| | - John Mckeown
- Everton Football Club, Finch Farm Training Complex, Finch Lane, Halewood, Liverpool, United Kingdom
| | - Martin Littlewood
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
- The Football Exchange, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
| | - Christopher McLaren-Towlson
- University of Hull, School of Sport Exercise and Rehabilitation Sciences, Cottingham Road, Hull, United Kingdom
| | - Matthew Andrew
- Department of Exercise and Sport Science, Manchester Metropolitan University, John Dalton Building, Manchester, United Kingdom
| | - Kevin Enright
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
- The Football Exchange, School of Sport and Exercises, Liverpool John Moores University, Liverpool, United Kingdom
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McAuley ABT, Varley I, Herbert AJ, Suraci B, Baker J, Johnston K, Kelly AL. Maturity-Associated Polygenic Profiles of under 12-16-Compared to under 17-23-Year-Old Male English Academy Football Players. Genes (Basel) 2023; 14:1431. [PMID: 37510335 PMCID: PMC10380058 DOI: 10.3390/genes14071431] [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: 06/07/2023] [Revised: 07/04/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
The purpose of this study was to examine polygenic profiles previously associated with maturity timing in male academy football players across different age phases. Thus, 159 male football players from four English academies (U12-16, n = 86, aged 13.58 ± 1.58 years; U17-23, n = 73, aged 18.07 ± 1.69 years) and 240 male European controls were examined. Polygenic profiles comprised 39 single nucleotide polymorphisms and were analysed using unweighted and weighted total genotype scores (TGSs; TWGSs). There were significant differences in polygenic profiles between groups, whereby U17-23 players had more genetic variants associated with later maturity compared to U12-16 players (TGS, p = 0.010; TWGS, p = 0.024) and controls (TGS, p = 0.038; TWGS, p = 0.020). More specifically, U17-23 players had over two-times the odds of possessing >36 later-maturing alleles than <30 compared to U12-16 players (odds ratio (OR) = 2.84) and controls (OR = 2.08). These results suggest there was a greater proportion of relatively later-maturing players as maturation plateaus towards adulthood, which may be explained by the 'underdog hypothesis'. This study provides the first known molecular evidence that supports the notion that a maturity selection bias exists within male academy football.
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Affiliation(s)
- Alexander B T McAuley
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham B15 3TN, UK
| | - Ian Varley
- Department of Sport Science, Nottingham Trent University, Nottingham NG11 8NS, UK
| | - Adam J Herbert
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham B15 3TN, UK
| | - Bruce Suraci
- Academy Coaching Department, AFC Bournemouth, Bournemouth BH7 7AF, UK
| | - Joseph Baker
- School of Kinesiology and Health Science, York University, Toronto, ON M3J 1P3, Canada
| | - Kathryn Johnston
- School of Kinesiology and Health Science, York University, Toronto, ON M3J 1P3, Canada
| | - Adam L Kelly
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham B15 3TN, UK
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12
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Su YJ, Ho CC, Lee PF, Lin CF, Hung YC, Chen PC, Hung CT, Chang YC. Gender and Age Differences in Anthropometric Characteristics of Taiwanese Older Adults Aged 65 Years and Older. Healthcare (Basel) 2023; 11:healthcare11091237. [PMID: 37174779 PMCID: PMC10178594 DOI: 10.3390/healthcare11091237] [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: 02/05/2023] [Revised: 04/09/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
A previous study provided reference data on the age and gender distribution of anthropometric parameters in Taiwanese adults. However, there are very few large-scale analyses of anthropometric data of older adults in Taiwan. Therefore, the main purpose of this study was to describe gender- and age-specific distributions of anthropometric measurements and anthropometry assessments of Taiwanese older adults. This was a cross-sectional study conducted on 22,389 adults aged 65 years or older (8017 males and 14,372 females) who participated in Taiwan's National Physical Fitness Survey 2014-2015. All participants were recruited using stratified convenience sampling from 46 physical fitness test stations in 22 cities or counties in Taiwan. The anthropometric measurements and anthropometry assessments included in the present study were the assessments of height, weight, body mass index (BMI), waist circumference (WC), hip circumference (HC), and waist-to-hip ratio (WHR). The results showed statistically significant differences in weight, height, WC, and WHR across all age groups among both male and female individuals aged 65 years and older in Taiwan. However, there was no significant difference in BMI and HC between males and females in all age groups. Anthropometric status provides an initial assessment of the overall health of the population. This study uses a representative population of Taiwanese older adults over the age of 65 for analysis and provides detailed information on anthropometric data distribution.
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Affiliation(s)
- Yan-Jhu Su
- Department of Gerontology, University of Massachusetts Boston, Boston, MA 02125, USA
| | - Chien-Chang Ho
- Department of Physical Education, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Research and Development Center for Physical Education, Health and Information Technology, College of Education, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Sports Medicine Center, Fu Jen Catholic Hospital, New Taipei City 243, Taiwan
| | - Po-Fu Lee
- Department of Leisure Industry and Health Promotion, National Ilan University, Yilan County 260, Taiwan
- College of Humanities and Management, National Ilan University, Yilan County 260, Taiwan
| | - Chi-Fang Lin
- Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei City 106, Taiwan
| | - Yi-Chuan Hung
- Department of Sport Management, National Taiwan University of Sport, Taichung City 404, Taiwan
- Sports Administration, Ministry of Education, Taipei City 104, Taiwan
| | - Pin-Chun Chen
- Graduate Institute of Sports Training, University of Taipei, Taipei City 111, Taiwan
| | - Chang-Tsen Hung
- Department of Health and Leisure Management, Yuanpei University of Medical Technology, Hsinchu City 306, Taiwan
| | - Yun-Chi Chang
- Department of Physical Education, Fu Jen Catholic University, New Taipei City 24205, Taiwan
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13
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Owen C, Till K, Phibbs P, Read DJ, Weakley J, Atkinson M, Cross M, Kemp S, Sawczuk T, Stokes K, Williams S, Jones B. A multidimensional approach to identifying the physical qualities of male English regional academy rugby union players; considerations of position, chronological age, relative age and maturation. Eur J Sport Sci 2023; 23:178-188. [PMID: 35142263 DOI: 10.1080/17461391.2021.2023658] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Interpreting the physical qualities of youth athletes is complex due to the effects of growth, maturation and development. This study aimed to evaluate the effect of position, chronological age, relative age and maturation on the physical qualities of elite male academy rugby union players. 1,424 participants (n = 2,381 observations) from nine Rugby Football Union regional academies prospectively completed a physical testing battery at three time points, across three playing seasons. Anthropometrics, body composition, muscular power, muscular strength, speed, aerobic capacity and running momentum were assessed. Positional differences were identified for all physical qualities. The largest effect sizes were observed for the associations between chronological age (d = 0.65-0.73) and maturation (d = -0.77 to -0.69) and body mass related variables (i.e. body mass and running momentum). Relative strength, maximum velocity and aerobic capacity were the only models to include two fixed effects with all other models including at least three fixed effects (i.e. position and a combination of chronological age, relative age and maturation). These findings suggest a multidimensional approach considering position, chronological age, relative age and maturation is required to effectively assess the physical qualities of male age grade rugby union players. Therefore practitioners should use regression equations rather than traditional descriptive statistic tables to provide individualised normative comparisons thus enhancing the application of testing results for talent identification and player development.Highlights Practitioners should record and incorporate position, chronological age, relative age and maturation into the physical evaluation of elite academy rugby union players.The regression equations provided within this study offer highly generalisable comparative values that are specific to a players chronological and biological development.Through the use of enhanced player evaluation practitioners will be able to make more informed decisions surrounding talent identification and athlete development.
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Affiliation(s)
- Cameron Owen
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,England Performance Unit, Rugby Football League Ltd, Leeds, UK
| | - Kevin Till
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Leeds Rhinos Rugby League Club, Leeds, UK
| | - Padraic Phibbs
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Leinster Rugby, Belfield, Dublin, Republic of Ireland
| | - Dale J Read
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester, UK
| | - Jonathon Weakley
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, Australia
| | - Mark Atkinson
- Sparta Science, Menlo Park, CA, USA.,Department for Health, University of Bath, Bath, UK
| | | | - Simon Kemp
- Medical Services, Rugby Football Union, Twickenham, UK.,Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Thomas Sawczuk
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,England Performance Unit, Rugby Football League Ltd, Leeds, UK.,School of Built Environment, Engineering and Computing, Leeds Beckett University, Leeds, UK.,Queen Ethelburga's Collegiate, Thorpe Underwood, York, UK
| | - Keith Stokes
- Department for Health, University of Bath, Bath, UK.,Medical Services, Rugby Football Union, Twickenham, UK
| | | | - Ben Jones
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,England Performance Unit, Rugby Football League Ltd, Leeds, UK.,Leeds Rhinos Rugby League Club, Leeds, UK.,Division of Exercise Science and Sports Medicine, University of Cape Town, Faculty of Health Sciences, Cape Town, South Africa.,School of Science and Technology, University of New England, Armidale, NSW, Australia
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14
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Towlson C, Watson DJ, Cumming S, Salter J, Toner J. Soccer academy practitioners' perceptions and application of bio-banding. PLoS One 2023; 18:e0274079. [PMID: 36701276 PMCID: PMC9879534 DOI: 10.1371/journal.pone.0274079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/22/2022] [Indexed: 01/27/2023] Open
Abstract
The primary aims of this study were to examine the application of maturity status bio-banding within professional soccer academy programmes and understand the methods employed, the intended objectives, and the potential barriers to bio-banding. Using a mixed method design, twenty-five professional soccer academy practitioners completed an online survey designed to examine their perceptions of the influence of maturation on practice, their perceptions and application of bio-banding, and the perceived barriers to the implementation of this method. Frequency and percentages of responses for individual items were calculated. In the next phase of the study, seven participants who had experience with, or knowledge of, the bio-banding process within an academy youth soccer setting were recruited to complete a semi-structured interview. Interview data was transcribed and analysed using a combination of deductive and inductive approaches to identify key themes. The main findings across the two phases of the study were that [1] there is consensus among the practitioners that the individual effect of maturation impacts their ability to accurately assess the soccer competencies, [2] the majority (80%) of the sample had implemented bio-banding, with practitioners showing a clear preference for using the Khamis and Roche method to bio-band players, with the greatest perceived benefit being during maturity-matched formats, specifically for late or post-PHV players, [3] Practitioners perceived that bio-banding enhances their ability to assess academy soccer players, and [4] practitioners who have used bio-banding believe that the method is an effective way of enhancing the perception of challenge thereby providing a number of psycho-social benefits. Findings suggest that a collaborative and multi-disciplinary approach is required to enhance the likelihood of bio-banding being successfully implemented within the typical training schedules across the adolescent phase of the player development pathway.
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Affiliation(s)
- Chris Towlson
- School of Sport and Exercise Science, University of Birmingham, Birmingham, United Kingdom
- * E-mail:
| | - Demi Jo Watson
- School of Sport and Exercise Science, University of Birmingham, Birmingham, United Kingdom
| | - Sean Cumming
- Department for Health, University of Bath, Bath, United Kingdom
| | - Jamie Salter
- School of Sport, York St John University, York, United Kingdom
| | - John Toner
- School of Sport and Exercise Science, University of Birmingham, Birmingham, United Kingdom
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15
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Affiliation(s)
- Chris Towlson
- School of Sport, Exercise and Rehabilitation Science, University of Hull, Hull, UK
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16
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Barrett S, Short K, Lowthorpe A, Swinton P, Maughan P, Hamilton A, Hunter F, Towlson C. Examination of differential ratings of perceived exertion (dRPE) during bio-banded small-sided games. PLoS One 2022; 17:e0270259. [PMID: 35905073 PMCID: PMC9337628 DOI: 10.1371/journal.pone.0270259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 06/07/2022] [Indexed: 11/22/2022] Open
Abstract
The aims of the current study were to investigate the use of dRPE with academy soccer players to: 1) examine the effect of bio-banded and non-bio-banded maturity groups within SSG on players dRPE; 2) describe the multivariate relationships between dRPE measures investigating the sources of intra and inter-individual variation, and the effects of maturation and bio-banding. Using 32 highly trained under (U) 12 to U14 soccer players (mean (SD) age 12.9 (0.9) years, body mass 46.4 (8.5) kg and stature 158.2 (14.9) cm) academy soccer players from two English professional male soccer academies. Players were categorised according to somatic maturity status using estimated percentage of adult stature attainment, with players randomly assigned into teams to play 4v4 SSG. The study used a repeated measures design, whereby the selected players participated within 6 bio-banded (maturity matched [pre-PHV Vs pre-PHV and post-PHV vs post PHV] and miss-matched [pre-PHV vs post-PHV] and 6 mixed maturity SSG at their respective clubs. Using mixed and fixed effect regression models, it was established hat pre-PHV players exhibited higher dRPE compared with their post-PHV counterparts. Mixed bio-banded games reported higher dRPE outputs overall. Variation in dRPE measures across a series of bio-banded games are caused by both between and within sources of variation in relatively equal amounts. Across a series of bio-banded games, the four dRPE measures do not provide unique information, and between variation is best expressed by one or two highly correlated components, with within variation best explained by a single equally loaded component. Using a bio-banding SSG design study, we have shown that pre-PHV players report higher subjective measures of exertion than post-PHV players during. Additionally, when evenly mixing players based on measures of maturation, higher measures of perceived exertion were generally reported.
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Affiliation(s)
| | - Kieran Short
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Alex Lowthorpe
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Paul Swinton
- School of Health Sciences, Robert Gordon University, Aberdeen, United Kingdom
| | - Patrick Maughan
- School of Health Sciences, Robert Gordon University, Aberdeen, United Kingdom
- School of Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | | | - Frances Hunter
- Middlesbrough Football Club, Middlesbrough, United Kingdom
| | - Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
- * E-mail:
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17
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Owen C, Till K, Darrall-Jones J, Jones B. Statistical analysis considerations within longitudinal studies of physical qualities in youth athletes: A qualitative systematic methodological review. PLoS One 2022; 17:e0270336. [PMID: 35797359 PMCID: PMC9262234 DOI: 10.1371/journal.pone.0270336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 06/08/2022] [Indexed: 11/18/2022] Open
Abstract
Background
The evaluation of physical qualities in talent identification and development systems is vital and commonplace in supporting youth athletes towards elite sport. However, the complex and dynamic development of physical qualities in addition to temporal challenges associated with the research design, such as unstructured data collection and missing data, requires appropriate statistical methods to be applied in research to optimise the understanding and knowledge of long-term physical development.
Aim
To collate and evaluate the application of methodological and statistical methods used in studies investigating the development of physical qualities within youth athletes.
Methods
Electronic databases were systematically searched form the earliest record to June 2021 and reference lists were hand searched in accordance with the PRISMA guidelines. Studies were included if they tested physical qualities over a minimum of 3 timepoints, were observational in nature and used youth sporting populations.
Results
Forty articles met the inclusion criteria. The statistical analysis methods applied were qualitatively assessed against the theoretical underpinnings (i.e. multidimensional development, non-linear change and between and within athlete change) and temporal challenges (i.e. time variant and invariant variables, missing data, treatment of time and repeated measures) encountered with longitudinal physical testing research. Multilevel models were implemented most frequently (50%) and the most appropriately used statistical analysis method when qualitatively compared against the longitudinal challenges. Independent groups ANOVA, MANOVA and X2 were also used, yet failed to address any of the challenges posed within longitudinal physical testing research.
Conclusions
This methodological review identified the statistical methods currently employed within longitudinal physical testing research and addressed the theoretical and temporal challenges faced in longitudinal physical testing research with varying success. The findings can be used to support the selection of statistical methods when evaluating the development of youth athletes through the consideration of the challenges presented.
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Affiliation(s)
- Cameron Owen
- Carnegie Applied Rugby Research (CARR) Centre, Leeds Beckett University, Carnegie School of Sport, Leeds, United Kingdom
- England Performance Unit, The Rugby Football League, Leeds, United Kingdom
- British Swimming, Loughborough, United Kingdom
- * E-mail:
| | - Kevin Till
- Carnegie Applied Rugby Research (CARR) Centre, Leeds Beckett University, Carnegie School of Sport, Leeds, United Kingdom
- Leeds Rhinos Rugby League Club, Leeds, United Kingdom
| | - Josh Darrall-Jones
- Carnegie Applied Rugby Research (CARR) Centre, Leeds Beckett University, Carnegie School of Sport, Leeds, United Kingdom
| | - Ben Jones
- Carnegie Applied Rugby Research (CARR) Centre, Leeds Beckett University, Carnegie School of Sport, Leeds, United Kingdom
- England Performance Unit, The Rugby Football League, Leeds, United Kingdom
- Leeds Rhinos Rugby League Club, Leeds, United Kingdom
- School of Science and Technology, University of New England, Armidale, NSW, Australia
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, The University of Cape Town and the Sports Science Institute of South Africa, Cape Town, South Africa
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18
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Parpa K, Michaelides M. Age-Related Differences in the Anthropometric and Physical Fitness Characteristics of Young Soccer Players: A Cross-Sectional Study. CHILDREN (BASEL, SWITZERLAND) 2022; 9:650. [PMID: 35626827 PMCID: PMC9139353 DOI: 10.3390/children9050650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/21/2022] [Accepted: 04/28/2022] [Indexed: 02/01/2023]
Abstract
Considering that most professional academies seek to optimize the early detection and physical development of their younger players, the purpose of this study was to examine the anthropometric and physical fitness characteristics in a large cross-sectional sample of youth soccer players in Eastern Europe, starting from a very young age during their in-season period. Three hundred and thirteen soccer players (n = 313), grouped into eight age categories, participated in the study. On the basis of chronological age, the group categories were: 7 (n = 26), 8 (n = 41), 9 (n = 46), 10 (n = 48), 11 (n = 42), 12 (n = 47), 13 (n = 43), and 14 years old (n = 20). The players underwent an anthropometric evaluation, flexibility, handgrip strength, vertical jump performance, speed, and agility assessments. A one-way multivariate analysis of variance (MANOVA) indicated significant differences in the anthropometric and physical fitness variables based on chronological age (F = 13.40, p < 0.05, Wilk’s Λ = 0.08, partial η2 = 0.30). Concurrently, there were significant growth and physical fitness differences even in players born in the same chronological year. It is believed that the results have important practical implications, especially for those involved in youth soccer. Based on our results, coaches should contemplate speed and agility development in training sessions starting from a much younger age, as sprinting while changing directions has been considered an essential prerequisite in soccer.
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Affiliation(s)
- Koulla Parpa
- Sport and Exercise Science, UCLan University of Cyprus, Pyla 7080, Cyprus;
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19
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Bolckmans S, Starkes JL, Towlson C, Barnes C, Parkin G, Helsen WF. Leveling the Playing Field: A New Proposed Method to Address Relative Age- and Maturity-Related Bias in UK Male Academy Soccer Players. Front Sports Act Living 2022; 4:847438. [PMID: 35308598 PMCID: PMC8928578 DOI: 10.3389/fspor.2022.847438] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 01/27/2022] [Indexed: 11/17/2022] Open
Abstract
Relative age selection bias persists within all major soccer leagues and youth soccer academies across the globe, with the relative age effect (RAE) being typically characterized as the over selection of relatively older players (who have sometimes also been shown to be early maturing). The aim of this study was to examine if a new allocation method (i) eliminates the RAE, and (ii) reduces the presence of any additional maturity-related differences in anthropometric and physical fitness characteristics which may exist between players within the same selection category. In the first phase, 1,003 academy soccer players [under (U) 9-16] from 23 UK professional soccer clubs were sampled and a clear RAE per birth quarter (Q) was observed for the overall sample (Q1 = 45.0% vs. Q4 = 9.8%) as well as for the different age categories. Using the newly suggested reallocation method, youth players were divided by allocation date which was defined as the midway point between the chronological age and the estimated developmental (ED) birthdate. Stature was used as an anthropometric reference point on the P50 of the growth curve to determine the developmental birthdate for this new method. After the reallocation of the players using ED, the distribution of players was more equally spread (Q1 = 25.3%, Q2 = 25.6%, Q3 = 22.4%, Q4 = 26.7%). After reallocation, the mean delta stature was reduced by 16.6 cm (from 40.3 ± 7.08 to 23.7 ± 4.09 cm, d = 2.87). The mean delta body mass difference after allocation was reduced by 6.7kg (from 33.2 ± 6.39 to 26.5 ± 4.85 kg, d = 1.18). The mean age difference increased from 1.8 to 3.9 years. A total of 42.7% of the sample would have been reallocated to a different age group compared to the current one. After reallocation, 45% of the anthropometric and physical fitness comparisons showed reductions in the within-group variation expressed as a percentage of coefficient of variation (CV%). The U10 players demonstrated the largest reduction in CV% (-7.6%) of the anthropometric characteristics. The U10 squad also showed the largest reduction in CV% for various physical fitness characteristics (-7.5%). By both eliminating the RAE and reducing temporary maturity-related anthropometric and physical fitness differences, soccer academies across the world may diversify and increase the size of the talent pool both for clubs and national youth teams. In conclusion, this study provides further evidence that the newly proposed allocation method shows the potential to remove the RAE and to create a more "leveled playing field" by reducing the within-group variation of anthropometric and physical fitness characteristics affording relatively younger, and eventually, late-maturing players the opportunity to develop their talent fairly.
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Affiliation(s)
- Sofie Bolckmans
- Department of Movement Sciences, KU Leuven, Leuven, Belgium
- Institute of Exercise Training and Sport Informatics, German Sport University Cologne, Köln, Germany
| | - Janet L. Starkes
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Chris Barnes
- CB Sports Performance Ltd., Rugeley, United Kingdom
- Staffordshire University, Stoke on Trent, United Kingdom
| | - Guy Parkin
- Pro Football Support, Huddersfield, United Kingdom
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20
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Towlson C, MacMaster C, Gonçalves B, Sampaio J, Toner J, MacFarlane N, Barrett S, Hamilton A, Jack R, Hunter F, Myers T, Abt G. The effect of bio-banding on physical and psychological indicators of talent identification in academy soccer players. SCI MED FOOTBALL 2022; 5:280-292. [PMID: 35077307 DOI: 10.1080/24733938.2020.1862419] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The aim of this study was to examine the effect of bio-banding on indicators of talent identification in academy soccer players. Seventy-two 11 to 14-year-old soccer players were bio-banded using percentage of estimated adult stature attainment (week 1), maturity-offset (week 2) or a mixed-maturity method (week 3). Players contested five maturity (mis)matched small-sided games with physical and psychological determinants measured. Data were analysed using a series of Bayesian hierarchical models, fitted with different response distributions and different random and fixed effect structures. Few between-maturity differences existed for physical measures. Pre-peak height velocity (PHV) and post-PHV players differed in PlayerLoadTM (anterior-posterior and medial-lateral) having effect sizes above our criterion value. Estimated adult stature attainment explained more of the variance in eight of the physical variables and showed the greatest individual differences between maturity groups across all psychological variables. Pre-PHV and post-PHV players differed in positive attitude, confidence, competitiveness, total psychological score (effect sizes = 0.43-0.69), and session rating of perceived exertion. The maturity-offset method outperformed the estimated adult stature attainment method in all psychological variables. Maturity-matched bio-banding had limited effect on physical variables across all players while enhancing a number of psychological variables considered key for talent identification in pre-PHV players.
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Affiliation(s)
| | - Calum MacMaster
- Department of Sport, Health and Exercise Science, University of Hull, UK.,Hull City AFC, Hull, UK
| | - Bruno Gonçalves
- Departamento de Desporto e Saúde, Escola de Ciências e Tecnologia, Universidade de Évora, Évora, Portugal.,Comprehensive Health Research Centre (CHRC), Universidade de Évora, Portugal.,Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Jaime Sampaio
- Centro de Investigação de Desporto, Saúde e Desenvolvimento Humano, Universidade de Trás-os-Montes e Alto Douro, Portugal
| | - John Toner
- Department of Sport, Health and Exercise Science, University of Hull, UK
| | | | | | | | - Rory Jack
- Hamilton Academical Football Club, Hamilton, UK
| | | | - Tony Myers
- Faculty of Arts, Society and Professional Studies, Newman University, Birmingham, UK
| | - Grant Abt
- Department of Sport, Health and Exercise Science, University of Hull, UK
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21
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Carlos BS, Mireia AR, María Reyes BV, Diego MU. Independent and combined influence of physical fitness components on self-esteem in adolescents: DADOS study. Ann Hum Biol 2022; 48:550-556. [DOI: 10.1080/03014460.2022.2032337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Bou-Sospedra Carlos
- Universtiy Jaume I, Castellón, Spain.
- LIFE Research Group, University Jaume I, Castellon, Spain
| | - Adelantado-Renau Mireia
- Universtiy Jaume I, Castellón, Spain.
- LIFE Research Group, University Jaume I, Castellon, Spain
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22
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Campa F, Greco G. Growth, Somatic Maturation, and Their Impact on Physical Health and Sports Performance: An Editorial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:1266. [PMID: 35162287 PMCID: PMC8835648 DOI: 10.3390/ijerph19031266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 02/05/2023]
Abstract
Over time, complex interactions and a nonlinear progression among a wide range of variables contribute to the improvement of physical health and of the elite level achievement in youth sport practitioners [...].
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Affiliation(s)
- Francesco Campa
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy
| | - Gianpiero Greco
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70121 Bari, Italy;
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23
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Ivanović J, Kukić F, Greco G, Koropanovski N, Jakovljević S, Dopsaj M. Specific Physical Ability Prediction in Youth Basketball Players According to Playing Position. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020977. [PMID: 35055798 PMCID: PMC8775855 DOI: 10.3390/ijerph19020977] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/09/2022] [Accepted: 01/13/2022] [Indexed: 02/05/2023]
Abstract
This study investigated the hierarchical structure of physical characteristics in elite young (i.e., U17-U19) basketball players according to playing positions. In addition, their predictive value of physical characteristics was determined for the evaluation of players’ physical preparedness. Sixty elite male basketball players performed 13 standardized specific field tests in order to assess the explosive power of lower limbs, speed, and change-of-direction speed. They were divided into three groups according to playing positions (guard [n = 28], forward [n = 22], center [n = 10]). The basic characteristics of the tested sample were: age = 17.36 ± 1.04 years, body height = 192.80 ± 4.49 cm, body mass = 79.83 ± 6.94 kg, and basketball experience = 9.38 ± 2.10 years for guards; age = 18.00 ± 1.00 years, body height = 201.48 ± 3.14 cm, body mass = 90.93 ± 9.85 kg, and basketball experience = 9.93 ± 2.28 years for forwards; and age = 17.60 ± 1.43 years; body height = 207.20 ± 3.29 cm, body mass = 104.00 ± 9.64 kg, and basketball experience = 9.20 ± 1.62 years for centers. For all playing positions factor analysis extracted three factors, which cumulatively explained 76.87, 88.12 and 87.63% of variance, respectively. The assessed performance measures were defined as significant (p < 0.001), with regression models of physical performance index (PPINDEX). PPINDEX of guards = −6.860 + (0.932 × t-test) − (1.656 × Acceleration 15 m) − (0.020 × Countermovement jump); PPINDEX of forwards = −3.436 − (0.046 × Countermovement jump with arm swing) − (1.295 × Acceleration 15 m) + (0.582 × Control of dribbling); PPINDEX of centers = −4.126 + (0.604 × Control of dribbling) − (1.315 × Acceleration 15 m) − (0.037 × Sargent jump). A model for the evaluation of physical performance of young basketball players has been defined. In addition, this model could be used as a reference model for selection procedures, as well as to monitor the efficacy of applied training programmes within the short, medium and long-term periodization.
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Affiliation(s)
- Jelena Ivanović
- Serbian Institute for Sport and Sports Medicine, 72 Kneza Višeslava Street, 11030 Belgrade, Serbia;
- Faculty of Sport, University “Union—Nikola Tesla”, Narodnih Heroja 30/I, 11070 Belgrade, Serbia
| | - Filip Kukić
- Police Sports Education Center, Abu Dhabi Police, Abu Dhabi 253, United Arab Emirates;
| | - Gianpiero Greco
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70121 Bari, Italy
- Correspondence:
| | - Nenad Koropanovski
- Department of Criminalistics, University of Criminal Investigation and Police Studies, 11080 Belgrade, Serbia;
| | - Saša Jakovljević
- Faculty for Sport and Physical Education, Belgrade University, 11000 Belgrade, Serbia; (S.J.); (M.D.)
| | - Milivoj Dopsaj
- Faculty for Sport and Physical Education, Belgrade University, 11000 Belgrade, Serbia; (S.J.); (M.D.)
- Institute of Sport, Tourism and Service, South Ural State University, 454080 Chelyabinsk, Russia
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Towlson C, MacMaster C, Gonçalves B, Sampaio J, Toner J, MacFarlane N, Barrett S, Hamilton A, Jack R, Hunter F, Stringer A, Myers T, Abt G. The effect of bio-banding on technical and tactical indicators of talent identification in academy soccer players. SCI MED FOOTBALL 2021; 6:295-308. [DOI: 10.1080/24733938.2021.2013522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Christopher Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | - Calum MacMaster
- Glasgow Rangers Football Club, Glasgow, UK
- University of Birmingham, Birmingham, UK
| | - Bruno Gonçalves
- Departamento de Desporto E Saúde, Escola de Saúde E Desenvolvimento Humano, Universidade de Évora, Évora, Portugal
- Comprehensive Health Research Centre (Chrc), Universidade de Évora, Portugal
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Jaime Sampaio
- Centro de Investigação de Desporto, Saúde E Desenvolvimento Humano, Universidade de Trás-os-Montes E Alto Douro, Vila Real, Portugal
| | - John Toner
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | | | | | | | - Rory Jack
- Hamilton Academical Football Club, Hamilton, UK
| | | | - Amy Stringer
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | - Tony Myers
- Faculty of Arts, Society and Professional Studies, Newman University, Birmingham, UK
| | - Grant Abt
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
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McBurnie AJ, Dos'Santos T, Johnson D, Leng E. Training Management of the Elite Adolescent Soccer Player throughout Maturation. Sports (Basel) 2021; 9:170. [PMID: 34941808 PMCID: PMC8708071 DOI: 10.3390/sports9120170] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/12/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
Professional soccer clubs invest significantly into the development of their academy prospects with the hopes of producing elite players. Talented youngsters in elite development systems are exposed to high amounts of sports-specific practise with the aims of developing the foundational skills underpinning the capabilities needed to excel in the game. Yet large disparities in maturation status, growth-related issues, and highly-specialised sport practise predisposes these elite youth soccer players to an increased injury risk. However, practitioners may scaffold a performance monitoring and injury surveillance framework over an academy to facilitate data-informed training decisions that may not only mitigate this inherent injury risk, but also enhance athletic performance. Constant communication between members of the multi-disciplinary team enables context to build around an individual's training status and risk profile, and ensures that a progressive, varied, and bespoke training programme is provided at all stages of development to maximise athletic potential.
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Affiliation(s)
- Alistair J McBurnie
- Football Medicine & Sports Science, Manchester United F.C., AON Training Complex, Manchester M31 4BH, UK
- Department of Sport Science, School of Science and Technology, Nottingham Trent University, Nottingham NG1 4FQ, UK
| | - Thomas Dos'Santos
- Musculoskeletal Science and Sports Medicine Research Centre, Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester M15 6BH, UK
- Manchester Institute of Sport, Manchester Metropolitan University, Manchester M1 7EL, UK
| | - David Johnson
- Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Edward Leng
- Football Medicine & Sports Science, Manchester United F.C., AON Training Complex, Manchester M31 4BH, UK
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Towlson C, Abt G, Barrett S, Cumming S, Hunter F, Hamilton A, Lowthorpe A, Goncalves B, Corsie M, Swinton P. The effect of bio-banding on academy soccer player passing networks: Implications of relative pitch size. PLoS One 2021; 16:e0260867. [PMID: 34914749 PMCID: PMC8675666 DOI: 10.1371/journal.pone.0260867] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 11/19/2021] [Indexed: 11/19/2022] Open
Abstract
The primary aims of this study were to examine the effects of bio-banding players on passing networks created during 4v4 small-sided games (SSGs), while also examining the interaction of pitch size using passing network analysis compared to a coach-based scoring system of player performance. Using a repeated measures design, 32 players from two English Championship soccer clubs contested mixed maturity and bio-banded SSGs. Each week, a different pitch size was used: Week 1) small (36.1 m2 per player); week 2) medium (72.0 m2 per player); week 3) large (108.8 m2 per player); and week 4) expansive (144.50 m2 per player). All players contested 12 maturity (mis)matched and 12 mixed maturity SSGs. Technical-tactical outcome measures were collected automatically using a foot-mounted device containing an inertial measurement unit (IMU) and the Game Technical Scoring Chart (GTSC) was used to subjectively quantify the technical performance of players. Passing data collected from the IMUs were used to construct passing networks. Mixed effect models were used with statistical inferences made using generalized likelihood ratio tests, accompanied by Cohen's local f2 to quantify the effect magnitude of each independent variable (game type, pitch size and maturation). Consistent trends were identified with mean values for all passing network and coach-based scoring metrics indicating better performance and more effective collective behaviours for early compared with late maturation players. Network metrics established differences (f2 = 0.00 to 0.05) primarily for early maturation players indicating that they became more integral to passing and team dynamics when playing in a mixed-maturation team. However, coach-based scoring was unable to identify differences across bio-banding game types (f2 = 0.00 to 0.02). Pitch size had the largest effect on metrics captured at the team level (f2 = 0.24 to 0.27) with smaller pitch areas leading to increased technical actions. The results of this study suggest that the use of passing networks may provide additional insight into the effects of interventions such as bio-banding and that the number of early-maturing players should be considered when using mixed-maturity playing formats to help to minimize late-maturing players over-relying on their early-maturing counterparts during match-play.
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Affiliation(s)
- Christopher Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Grant Abt
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | | | - Sean Cumming
- Department for Health, University of Bath, Bath, United Kingdom
| | - Frances Hunter
- Middlesbrough Football Club, Middlesbrough, United Kingdom
| | | | - Alex Lowthorpe
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Bruno Goncalves
- Departamento de Desporto e Saúde, Escola de Saúde e Desenvolvimento Humano, Universidade de Évora, Évora, Portugal
- Comprehensive Health Research Centre (CHRC), Universidade de Évora, Évora, Portugal
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Martin Corsie
- School of Health Sciences, Robert Gordon University, Aberdeen, United Kingdom
| | - Paul Swinton
- School of Health Sciences, Robert Gordon University, Aberdeen, United Kingdom
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Age and Maturity Effects on Morphological and Physical Performance Measures of Adolescent Judo Athletes. J Hum Kinet 2021; 80:139-151. [PMID: 34868424 PMCID: PMC8607782 DOI: 10.2478/hukin-2021-0090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Studies assessing age and maturation effects on morphological and physical performance measures of young judokas are scarce. This study aimed to assess the independent and combined effects of chronological age and biological maturation on anthropometry and physical performance of 67 judokas aged 11-14. Participants’ anthropometric profiles were assessed, and physical performance tests were completed. Multivariate analyses of variance revealed an independent effect of age (anthropometry: F = 1.871; p < 0.05; Pillai’s trace = 0.545; η2p = 0.272; physical performance: F = 2.876; p < 0.01; Pillai’s trace = 0.509; η2p = 0.254) and maturity (anthropometry: F = 10.085; p < 0.01; Pillai’s trace = 0.669; η2p = 0.669; physical performance: F = 11.700; p < 0.01; Pillai’s trace = 0.581; η2p = 0.581). There was no significant combined effect of age and maturity. The maturation effect remained significant when controlled for age (anthropometry: F = 4.097; p < 0.01; Pillai’s trace = 0.481; η2p = 0.481; physical performance: F = 3.859; p < 0.01; Pillai’s trace = 0.0.318; η2p = 0.318). Inadolescent judokas, the maturation effect on growth and physical performance seems to be more relevant than the age effect, leading to the need to control this effect in training routines and competitive events. As in studies with youth soccer players and other youth athletes, bio-banding can be a strategy for controlling maturation in combat sports.
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28
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MacMaster C, Portas M, Parkin G, Cumming S, Wilcox C, Towlson C. The effect of bio-banding on the anthropometric, physical fitness and functional movement characteristics of academy soccer players. PLoS One 2021; 16:e0260136. [PMID: 34843528 PMCID: PMC8629286 DOI: 10.1371/journal.pone.0260136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 11/04/2021] [Indexed: 11/19/2022] Open
Abstract
The study examined if maturity status bio-banding reduces within-group variance in anthropometric, physical fitness and functional movement characteristics of 319, under-14 and under-15 players from 19 UK professional soccer academies. Bio-banding reduced the within-bio-banded group variance for anthropometric values, when compared to an aggregated chronological banded group (chronological: 5.1-16.7%CV; bio-banded: 3.0-17.3%CV). Differences between these bio-banded groups ranged from moderate to very large (ES = 0.97 to 2.88). Physical performance variance (chronological: 4.8-24.9%CV; bio-banded: 3.8-26.5%CV) was also reduced with bio-banding compared to chronological aged grouping. However, not to the same extent as anthropometric values with only 68.3% of values reduced across banding methods compared to 92.6% for anthropometric data. Differences between the bio-banded groups physical qualities ranged from trivial to very large (ES = 0.00 to 3.00). The number of functional movement metrics and %CV reduced by bio-banding was lowest within the 'circa-PHV' groups (11.1-44.4%). The proportion of players achieving the threshold value score of ≥ 14 for the FMS™ was highest within the 'post-PHV' group (50.0-53.7%). The use of maturity status bio-banding can create more homogenous groups which may encourage greater competitive equity. However, findings here support a bio-banding maturity effect hypothesis, whereby maturity status bio-banding has a heightened effect on controlling for characteristics which have a stronger association to biological growth.
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Affiliation(s)
- Calum MacMaster
- School of Sport and Exercise Science, University of Birmingham, Birmingham, United Kingdom
| | - Matt Portas
- The English Football Association, St Georges Park, Burton Upton Trent, Staffordshire, United Kingdom
- School of Health and Science, Teesside University, Middlesbrough, Yorkshire, United Kingdom
| | - Guy Parkin
- Pro Football Support, Huddersfield, Yorkshire, United Kingdom
| | - Sean Cumming
- Department for Health, University of Bath, Bath, Somerset, United Kingdom
| | - Chris Wilcox
- Department of Sport, Health and Exercise Science, University of Hull, Yorkshire, United Kingdom
| | - Christopher Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Yorkshire, United Kingdom
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29
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Lüdin D, Donath L, Cobley S, Romann M. Effect of bio-banding on physiological and technical-tactical key performance indicators in youth elite soccer. Eur J Sport Sci 2021; 22:1659-1667. [PMID: 34542017 DOI: 10.1080/17461391.2021.1974100] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Bio-banding has been introduced to reduce the impact of inter-individual differences due to biological maturation among youth athletes. Existing studies in youth soccer have generally examined the pilot-testing application of bio-banding. This is the first study that investigated whether bio-banded (BB) versus chronological age (CA) competition affects reliable physiological and technical-tactical in-game key performance indicators (KPIs) using a randomized cross-over repeated measures design. Sixty-five youth elite soccer players from the under-13 (U13) and under-14 (U14) age category and with maturity offsets (MO) between -2.5 and 0.5 years, competed in both a BB and CA game. For statistical analysis, players were divided into four sub-groups according to CA and MO: U13MOlow (CA ≤ 12.7, MO ≤ -1.4), U13MOhigh (CA ≤ 12.7, MO > -1.4), U14MOlow (CA > 12.7, MO ≤ -1.4), U14MOhigh (CA > 12.7, MO > -1.4). The two-factor mixed ANOVA revealed significant (p < .05) interactions between competition format and sub-group for the KPIs high accelerations (ηp2 = .176), conquered balls (ηp2 = .227) and attack balls (ηp2 = .146). Especially, U13MOhigh (i.e. early maturing players) faced a higher physiological challenge by having more high accelerations (|d| = 0.6) in BB games. Notably, U14MOlow (i.e. late maturing players) had more opportunities to show their technical-tactical abilities during BB games with more conquered balls (|d| = 1.1) and attack balls (|d| = 1.6). Affected KPIs indicate new challenges and learning opportunities during BB competition depending on a player's individual maturity status. Bio-banding can beneficially be applied to enhance the talent development of youth elite soccer players.
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Affiliation(s)
- Dennis Lüdin
- Department of Elite Sport, Swiss Federal Institute of Sport Magglingen, Magglingen, Switzerland
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Stephen Cobley
- Department of Exercise and Sport Science, University of Sydney, Sydney, Australia
| | - Michael Romann
- Department of Elite Sport, Swiss Federal Institute of Sport Magglingen, Magglingen, Switzerland
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30
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Fortes LS, Fonseca FS, Nakamura FY, Barbosa BT, Gantois P, de Lima-Júnior D, Ferreira MEC. Effects of Mental Fatigue Induced by Social Media Use on Volleyball Decision-Making, Endurance, and Countermovement Jump Performance. Percept Mot Skills 2021; 128:2745-2766. [PMID: 34404292 DOI: 10.1177/00315125211040596] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We studied the effects of repeated inducements of mental fatigue (MF) from using social media on smartphones immediately before training sessions by young male volleyball athletes, focusing specifically on their decision-making, endurance, and countermovement jump performance (CMJ). We pair-matched 24 participants according to their decision-making abilities and then, randomly assigned them to one of two 4-week block training groups: control (CON) and smartphone use (SMA). For a 30-minute period before each training session, the CON group watched TV and the SMA group used social media apps on smartphones. We found a significant group x time interaction effect for decision making (attack, p = 0.03; passing, p = 0.02) during training blocks. More specifically, only the CON group improved their decision making (attack, p = 0.03; passing, p = 0.02). Both groups significantly improved their CMJ performance (p = .01), with no significant group x time interaction effect for CMJ (p = 0.91). Neither group significantly improved their endurance (p = 0.56). We concluded that 30-minutes of repetitive social media app use on a smartphone immediately before 4-weeks of volleyball training sessions negatively affected decision-making in young male volleyball athletes.
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Affiliation(s)
- Leonardo S Fortes
- Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil
| | - Fabiano S Fonseca
- Department of Physical Education, Federal Rural University of Pernambuco, Recife, Brazil
| | - Fabio Y Nakamura
- Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil
| | - Bruno Teixeira Barbosa
- Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil
| | - Petrus Gantois
- Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil
| | - Dalton de Lima-Júnior
- Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil
| | - Maria E C Ferreira
- Graduate Program of Physical Education, Federal University of Juiz de Fora, Juiz de Fora, Brazil
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31
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Chen SC, Lin CW, Lee PF, Chen HL, Ho CC. Anthropometric Characteristics in Taiwanese Adults: Age and Gender Differences. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18147712. [PMID: 34300162 PMCID: PMC8306797 DOI: 10.3390/ijerph18147712] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/18/2021] [Accepted: 07/18/2021] [Indexed: 12/28/2022]
Abstract
Population aging is creating critical issues in Taiwan, and adults are being forced to maintain productivity at work; in other words, they need to work longer. Therefore, their fitness and health warrant immediate attention. Although the association between health and anthropometric characteristics has been reported, few profiles on Taiwanese adults can be found. The purpose of this study was to provide a suitable reference on the anthropometric data of Taiwanese adults. We recruited 60,056 anthropometric measurements from a representative database. Significant differences were found in every measurement for each gender and age group. Statistically, our results indicated anthropometric differences in different ages. However, CVs showed that the dispersions are minor. This study presents a sufficient profile on Taiwanese adults from a representative database to practitioners and other potential users.
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Affiliation(s)
- Shih-Chang Chen
- Department of Leisure Industry and Health Promotion, National Ilan University, Ilan County, Yilan City 260, Taiwan; (S.-C.C.); (P.-F.L.)
| | - Chaou-Wen Lin
- Department of Marine Leisure and Tourism, Taipei University of Marine Technology, Taipei City 111, Taiwan;
| | - Po-Fu Lee
- Department of Leisure Industry and Health Promotion, National Ilan University, Ilan County, Yilan City 260, Taiwan; (S.-C.C.); (P.-F.L.)
- Center of General Education, Taipei Medical University, Taipei City 110, Taiwan
| | - Hui-Ling Chen
- Graduate Institute of Educational Leadership and Development, Fu Jen Catholic University, New Taipei City 242, Taiwan;
| | - Chien-Chang Ho
- Department of Physical Education, Fu Jen Catholic University, New Taipei City 242, Taiwan
- Office of Physical Education, Fu Jen Catholic University, New Taipei City 242, Taiwan
- Research and Development Center for Physical Education, Health, and Information Technology, Fu Jen Catholic University, New Taipei City 242, Taiwan
- Correspondence: ; Tel.: +886-2-2905-3386
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Giuriato M, Codella R, Lovecchio N, Carnevale Pellino V, Vandoni M, Nevill AM. Speed agility trends in children according to growth. Ann Hum Biol 2021; 48:271-279. [PMID: 33974454 DOI: 10.1080/03014460.2021.1928285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Speed agility is considered as the whole assessment of speed of movement, agility and coordination. The 10x4m test has been broadly used to evaluate physical fitness and overall health in children of developmental ages. A myriad of studies have investigated the ecology of speed agility (SA). However, body dimensions are rarely appraised, and this is a weakness because body shapes are affected by growth. AIM This study aimed to model SA-specific allometric equations, and develop an approach objectively predictive for performance while controlling for maturity through age at peak height velocity (agePHV). SUBJECTS AND METHODS A total of 7317 (3627 girls) children aged 8-11 years were SA-tested. Multiplicative models with allometric body-size components, agePHV, and categorical differences, were implemented to evaluate SA performance. RESULTS Model 1 accounted for body-size and shape only, whereas Model 2 included agePHV and Model 3 considered standing broad jump (SBJ) as a surrogate marker for explosive strength. An ectomorphic dominance was revealed across all the models. CONCLUSION The explosive strength resulted in influencing SA per height-to-weight ratio. Further, positive exponent of agePHV suggested that the late maturers were likely to show better SA performances. Predictive equations modelled on developmental factors are fundamental to scrutinise performances as valuable health and fitness outcomes in childhood.
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Affiliation(s)
- Matteo Giuriato
- Department of Neurosciences, Biomedicine and Movement Sciences, Università di Verona, Verona, Italy.,Unit of Molecular Biology, Department of Health and Natural Sciences, Faculty of Physical Culture, Gdansk University of Physical Education and Sport, Gdansk, Poland
| | - Roberto Codella
- Department of Endocrinology, Nutrition and Metabolic Diseases, IRCCS MultiMedica, Milano, Italy.,Department of Biomedical Science for Health, Università degli Studi di Milano, Milano, Italy
| | - Nicola Lovecchio
- Department of Human Science, Università degli Studi di Bergamo, Bergamo, 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 TorVergata, Rome, Italy
| | - Matteo Vandoni
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental Medicine and Forensic Science, University of Pavia, Pavia, Italy
| | - Alan M Nevill
- Faculty of Education, Health and Wellbeing, University of Wolverhampton, Walsall, UK
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33
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Towlson C, Salter J, Ade JD, Enright K, Harper LD, Page RM, Malone JJ. Maturity-associated considerations for training load, injury risk, and physical performance in youth soccer: One size does not fit all. JOURNAL OF SPORT AND HEALTH SCIENCE 2021; 10:403-412. [PMID: 32961300 PMCID: PMC8343060 DOI: 10.1016/j.jshs.2020.09.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/24/2020] [Accepted: 08/07/2020] [Indexed: 05/14/2023]
Abstract
Biological maturation can be defined as the timing and tempo of progress to achieving a mature state. The estimation of age of peak height velocity (PHV) or percentage of final estimated adult stature attainment (%EASA) is typically used to inform the training process in young athletes. In youth soccer, maturity-related changes in anthropometric and physical fitness characteristics are diverse among individuals, particularly around PHV. During this time, players are also at an increased risk of sustaining an overuse or growth-related injury. As a result, the implementation of training interventions can be challenging. The purpose of this review was to (1) highlight and discuss many of the methods that can be used to estimate maturation in the applied setting and (2) discuss the implications of manipulating training load around PHV on physical development and injury risk. We have provided key stakeholders with a practical online tool for estimating player maturation status (Supplementary Maturity Estimation Tools). Whilst estimating maturity using predictive equations is useful in guiding the training process, practitioners should be aware of its limitations. To increase the accuracy and usefulness of data, it is also vital that sports scientists implement reliable testing protocols at predetermined time-points.
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Affiliation(s)
- Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull HU6 7RX, UK.
| | - Jamie Salter
- School of Sport, York St John University, York YO31 7EX, UK
| | - Jack D Ade
- Liverpool FC Academy, Liverpool Football Club, Liverpool L33 7ED, UK; Research Institute for Sport and Exercise Sciences, L3, Liverpool John Moores University, Liverpool L3 3A, UK
| | - Kevin Enright
- Research Institute for Sport and Exercise Sciences, L3, Liverpool John Moores University, Liverpool L3 3A, UK
| | - Liam D Harper
- Human and Health Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK
| | - Richard M Page
- Department of Sport and Physical Activity, Edge Hill University, Ormskirk L39 4QP, UK
| | - James J Malone
- School of Health Sciences, Liverpool Hope University, Liverpool L16 9JD, UK
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Towlson C, MacMaster C, Parr J, Cumming S. One of these things is not like the other: Time to differentiate between relative age and biological maturity selection biases in soccer? SCI MED FOOTBALL 2021; 6:273-276. [DOI: 10.1080/24733938.2021.1946133] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | - Calum MacMaster
- School of Sport and Exercise Science, University of Birmingham, UK
| | - James Parr
- Department for Health, University of Bath, Bath, UK
| | - Sean Cumming
- Department for Health, University of Bath, Bath, UK
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Longitudinal Relationships Between Maturation, Technical Efficiency, and Performance in Age-Group Swimmers: Improving Swimmer Evaluation. Int J Sports Physiol Perform 2021; 16:1082–1088. [PMID: 33706288 DOI: 10.1123/ijspp.2020-0377] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/29/2020] [Accepted: 08/13/2020] [Indexed: 11/18/2022]
Abstract
PURPOSE The study aimed to (1) accurately examine longitudinal relationships between maturity status and both technical skill indices and performance in Australian male (N = 64) age-group Front-crawl swimmers (10-15 y) and (2) determine whether individual differences in maturation influenced relationships between technical skill level and swimming performance. METHODS A repeated-measures design was used to assess maturity status and performance on 200-m Front-crawl trial across 2 competition seasons (2018-2020). Assessments were made on 3 to 5 occasions (median = 3) separated by approximately 4 months. Average horizontal velocity and stroke frequency were used to calculate technical skill indices, specifically stroke index, and arm propelling efficiency. Relationships between variables were assessed using linear mixed models, identifying fixed, and random effect estimates. RESULTS Curvilinear trends best described significant longitudinal relationships between maturity status with horizontal velocity (F = 10.33 [1, 233.77]; P = .002) and stroke index (F = 5.55 [1, 217.9]; P = .02) during 200-m Front-crawl trials. Maturity status was not significantly related to arm propelling efficiency (P = .08). However, arm propelling efficiency was an independent predictor of Front-crawl velocity (F = 55.89 [1, 210.45]; P < .001). CONCLUSIONS Maturity status predicted assessment of swimmer technical skill (stroke index) and swimming performance. However, technical skill accessed via arm propelling efficiency was independent of maturation and was predictive of performance. Maturity status influences performance evaluation based on technical skill and velocity. Findings highlight the need to account for maturation and technical skill in age-group swimmers to better inform swimmer evaluation.
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Helsen WF, Thomis M, Starkes JL, Vrijens S, Ooms G, MacMaster C, Towlson C. Leveling the Playing Field: A New Proposed Method to Address Relative Age- and Maturity-Related Bias in Soccer. Front Sports Act Living 2021; 3:635379. [PMID: 33748755 PMCID: PMC7969981 DOI: 10.3389/fspor.2021.635379] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/22/2021] [Indexed: 11/13/2022] Open
Abstract
Despite various solutions proposed to solve the relative age effect (RAE), it is still a major problem confounding talent identification and selection processes. In the first phase, we sampled 302 under 7-21 academy soccer players from two Belgian professional soccer clubs to explore the potential of a new approach to solve the inequalities resulting from relative age- and maturity-related bias. This approach allocates players into four discrete quartile groups based on the midway point of their chronological and estimated developmental (ED) birth dates (calculated using the growth curves for stature of Belgian youth). With the use of chi square analyses, a RAE was found (p < 0.01) for the overall sample (Q1 = 41.4% vs. Q4 = 14.9%) that completely disappeared after reallocation (Q1 = 26.5%; Q2 = 21.9%; Q3 = 27.5%; Q4 = 24.2%). According to the new allocation method, the stature difference was reduced, on average, by 11.6 cm (from 24.0 ± 9.9 to 12.4 ± 3.4 cm, d = 1.57). Body mass difference between the two methods was 1.9 kg (20.1 ± 11.3-18.2 ± 13.1 kg, respectively, d = 0.15). The new method created a maximum chronological age difference of 1.9 vs. 0.8 years for the current method. With the use of this method, 47% of the players would be reallocated. Twenty-three percent would be moved up one age category, and 21% would be moved down. In the second phase, we also examined 80 UK academy soccer players to explore if reallocating players reduces the within-playing group variation of somatic and physical fitness characteristics. The percentage coefficient of variation (%CV) was reduced (0.2-10.1%) in 15 out of 20 metrics across U11-U16 age categories, with the U13 age category demonstrating the largest reductions (0.9-10.1%) in CV. The U12 and U13 age categories and associated reallocation groupings showed trivial to small (ES = 0.0-0.5) between-method differences and trivial to moderate (ES = 0.0-1.1) differences within the U14-U16 age categories. A reduction in RAE may lead to fewer dropouts and thus a larger player pool, which benefits, in turn, talent identification, selection, and development.
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Affiliation(s)
| | - Martine Thomis
- KU Leuven, Department of Movement Sciences, Leuven, Belgium
| | - Janet L. Starkes
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Sander Vrijens
- KU Leuven, Department of Movement Sciences, Leuven, Belgium
| | - Gerrit Ooms
- KU Leuven, Department of Movement Sciences, Leuven, Belgium
| | - Calum MacMaster
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
| | - Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
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Martinho DV, Baptista R, Teixeira AS, Duarte JP, Valente-Dos-Santos J, Coelho-E-Silva MJ, Santos AMC, Armstrong N. Allometric Scaling of Force-velocity Test Output Among Pre-pubertal Basketball Players. Int J Sports Med 2021; 42:994-1003. [PMID: 33621996 DOI: 10.1055/a-1327-2727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Basketball is characterized by high-intensity episodes predominantly reliant on anaerobic metabolism. The force-velocity test enables individual determination of an optimal braking force and emerged as appropriate to estimate optimal peak power. It has rarely been used in youth basketball. This study aimed to examine the contribution of body size, composition, and biological maturation to interindividual variation in force-velocity test output among pre-pubertal basketball players. The sample consisted of 64 male participants (8.4-12.3 years). Stature, sitting height, body mass and two skinfolds were measured, and leg length estimated. Fat-free mass and lower limb volume were estimated from anthropometry. Age at peak height velocity was predicted from maturity offset. Optimal peak power was correlated with all body size descriptors (correlation: 0.541-0.700). Simple allometric models explained 30-47% of inter-individual variance, with fat-free mass being the best predictor of performance. Whole-body fat-free mass (as a surrogate for active muscle mass) plus the indicator of maturation emerged as the best proportional allometric model (53% explained variance). Even at pre-pubertal ages, the interpretation of the force-velocity test requires assessing the metabolically active component of body mass.
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Affiliation(s)
- Diogo V Martinho
- University of Coimbra, FCDEF, Coimbra, Portugal.,University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | | | - Anderson S Teixeira
- Research Group for Development of Football and Futsal / Physical Effort Laboratory, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Joao P Duarte
- University of Coimbra, FCDEF, Coimbra, Portugal.,University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | - Joao Valente-Dos-Santos
- University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal.,Lusófona University, Faculty of Physical Education and Sport, Lisbon, Portugal
| | - Manuel J Coelho-E-Silva
- University of Coimbra, FCDEF, Coimbra, Portugal.,University of Coimbra, CIDAF (uid/dtp/04213/2020), Coimbra, Portugal
| | | | - Neil Armstrong
- Children's Health and Exercise Research Centre, University of Exeter, Exeter, United Kingdom of Great Britain and Northern Ireland
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Are Early or Late Maturers Likely to Be Fitter in the General Population? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18020497. [PMID: 33435414 PMCID: PMC7827466 DOI: 10.3390/ijerph18020497] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/27/2020] [Accepted: 01/06/2021] [Indexed: 11/16/2022]
Abstract
The present study aims to identify the optimal body-size/shape and maturity characteristics associated with superior fitness test performances having controlled for body-size, sex, and chronological-age differences. The sample consisted of 597 Tunisian children (396 boys and 201 girls) aged 8 to 15 years. Three sprint speeds recorded at 10, 20 and 30 m; two vertical and two horizontal jump tests; a change-of-direction and a handgrip-strength tests, were assessed during physical-education classes. Allometric modelling was used to identify the benefit of being an early or late maturer. Findings showed that being tall and light is the ideal shape to be successful at most physical fitness tests, but the height-to-weight “shape” ratio seems to be test-dependent. Having controlled for body-size/shape, sex, and chronological age, the model identified maturity-offset as an additional predictor. Boys who go earlier/younger through peak-height-velocity (PHV) outperform those who go at a later/older age. However, most of the girls’ physical-fitness tests peaked at the age at PHV and decline thereafter. Girls whose age at PHV was near the middle of the age range would appear to have an advantage compared to early or late maturers. These findings have important implications for talent scouts and coaches wishing to recruit children into their sports/athletic clubs.
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Abbott S, Hogan C, Castiglioni MT, Yamauchi G, Mitchell LJG, Salter J, Romann M, Cobley S. Maturity-related developmental inequalities in age-group swimming: The testing of 'Mat-CAPs' for their removal. J Sci Med Sport 2020; 24:397-404. [PMID: 33172611 DOI: 10.1016/j.jsams.2020.10.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/03/2020] [Accepted: 10/06/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To (1) examine the association between maturity timing and performance-based selection levels in (N=708) Australian male 100-m Freestyle swimmers (12-17 years); (2) identify the relationship between maturation status and 100-m Freestyle performance; and (3) determine whether Maturation-based Corrective Adjustment Procedures (Mat-CAPs) could remove maturation-related differences in swimming performance. METHODS In Part 1, maturity timing category distributions ('Early', 'Early Normative', 'Late Normative' and 'Late') for 'All', 'Top 50%' and '25%' of raw swimming times were examined within and across age-groups. In Part 2, multiple regression analyses quantified the relationship between maturity offset (YPHV) and swimming performance. In Part 3, sample-based maturity timing category distributions were examined based on raw and correctively adjusted swim times for 12-17 year old age-groups. RESULTS Based on raw swim times, a high prevalence of 'Early-maturing' swimmers, with large effect sizes was identified (e.g., 14 years 'All' - χ2 (3, 151=111.98, p<0.001; 'Early' v 'Late' OR=82.0 95%CI=4.77, 1409.9); while a complete absence of 'Late-maturers' was apparent in the sample (N=708). When maturity categories were re-defined based on sample mean±standard deviation, and when using the expected curvilinear trendline identified in Part 2, Mat-CAPs mitigated maturity timing biases across all age-groups and selection levels, and removed the Freestyle performance advantage afforded by advanced maturity timing and status. CONCLUSIONS Removing the influence of maturation-related developmental differences could help improve youth swimmer participation experiences and improve the accuracy of identifying genuinely skilled age-group swimmers.
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Affiliation(s)
- Shaun Abbott
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Australia
| | - Clorinda Hogan
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Australia
| | | | - Goshi Yamauchi
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Australia
| | | | | | - Michael Romann
- Swiss Federal Institute of Sport Magglingen, Switzerland
| | - Stephen Cobley
- Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Australia.
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Bou-Sospedra C, Adelantado-Renau M, Beltran-Valls MR, Moliner-Urdiales D. Association between Health-Related Physical Fitness and Self-Rated Risk of Depression in Adolescents: Dados Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17124316. [PMID: 32560324 PMCID: PMC7345278 DOI: 10.3390/ijerph17124316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/11/2020] [Accepted: 06/15/2020] [Indexed: 01/23/2023]
Abstract
Depression is the most common mental disorder, affecting around 5% of adolescents. Physical fitness is considered a powerful marker of physical and mental health. The scientific results on the relationship between physical fitness and depression in the adolescent population are mixed. Therefore, the aim of the current study was to analyse the association between objectively assessed physical fitness and self-rated risk of depression in a group of adolescents. A total of 225 participants (44% girls), aged 13.9 ± 0.3 years, from the Deporte, ADOlescencia y Salud (DADOS) study were included in the analyses. Field-based Assessing Levels of Physical fitness and Health in Adolescents (ALPHA) health-related fitness test battery was used to objectively assess physical fitness components. The Behavior Assessment System for Children (BASC) level 3 was used to evaluate self-rated risk of depression. Our results showed that self-rated risk of depression was inversely associated with cardiorespiratory fitness (β = −0.172), as well as positively associated with body mass index (β = 0.146) and waist circumference (β = 0.137) (all p < 0.05). Adolescents with low levels of cardiorespiratory fitness had significantly higher odds of self-rated risk of depression (OR = 7.17; 95% CI, 1.51–33.95). These findings suggest that health-related physical fitness, particularly cardiorespiratory fitness and body composition, is associated with depression in adolescents.
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41
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Colyer SL, Nagahara R, Takai Y, Salo AIT. The effect of biological maturity status on ground reaction force production during sprinting. Scand J Med Sci Sports 2020; 30:1387-1397. [PMID: 32285541 DOI: 10.1111/sms.13680] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/25/2020] [Accepted: 04/06/2020] [Indexed: 11/27/2022]
Abstract
Sprint ability develops nonlinearly across childhood and adolescence. However, the underpinning ground reaction force (GRF) production is not fully understood. This study aimed to uncover the kinetic factors that explain these maturation-related sprint performance differences in Japanese boys and girls. A total of 153 untrained schoolchildren (80 boys, 73 girls) performed two 50-m maximal effort sprints over a 52-force-platform system embedded in an indoor track. Maturity offset (years from peak height velocity; PHV) was estimated using anthropometric data and used to categorise the children into six-year-long maturation groups (from group 1 [5.5-4.5 years before PHV] to group 6 [0.5 years before to 0.5 years after PHV). Maximum and mean step-averaged velocities across 26 steps were compared across consecutive maturation groups, with further GRF analysis (means and waveforms [statistical parametric mapping]) performed when velocity differences were observed. For boys, higher maximum velocities (effect size ± 90% CI = 1.63 ± 0.69) were observed in maturation group 2 (4.5-3.5 years before PHV) compared to group 1 (5.5-4.5 years before PHV), primarily attributable to higher antero-posterior GRFs across shorter ground contacts. Maximum velocities increased from maturation group 4 (2.5-1.5 years before PHV) to group 5 (1.5-0.5 years before PHV) in the girls (effect size ± 90% CI = 1.00 ± 0.78), due to longer ground contacts rather than higher GRFs per se. Waveform analyses revealed more effective reversal of braking forces and higher propulsive forces (e.g. 14%-77% of stance 4), particularly for comparisons involving boys, which suggested potentially enhanced stretch-shortening ability. Youth sport practitioners should consider these maturation-specific alterations when evaluating young athletes' sprint abilities.
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Affiliation(s)
- Steffi L Colyer
- Department for Health, University of Bath, Bath, UK.,CAMERA - Centre for the Analysis of Motion, Entertainment Research and Applications, University of Bath, Bath, UK
| | - Ryu Nagahara
- National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - Yohei Takai
- National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - Aki I T Salo
- Department for Health, University of Bath, Bath, UK.,CAMERA - Centre for the Analysis of Motion, Entertainment Research and Applications, University of Bath, Bath, UK.,KIHU Research Institute for Olympic Sports, Jyväskylä, Finland
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Effects of Anthropometric Growth and Basketball Experience on Physical Performance in Pre-Adolescent Male Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17072196. [PMID: 32218293 PMCID: PMC7178209 DOI: 10.3390/ijerph17072196] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/23/2020] [Accepted: 03/23/2020] [Indexed: 01/20/2023]
Abstract
During pre-adolescence, several variables connected to growth and weight status could influence physical performance and technical skills. This study aims to assess the influence of growth-related anthropometric changes, weight status, and basketball experience on physical performance in pre-adolescent basketball players. The sample consisted of 50 male basketball players (12.2 ± 0.4 years-old) included in the U-13 category. Anthropometric characteristics were collected using standard procedures. Physical performance was evaluated by 20 m Dash, T-test, squat jump, countermovement jump, and medicine ball throw. In order to assess growth-related changes, we conducted two surveys within a 10-week time span. Student’s t-test was used to compare the data collected in the two surveys and multiple regression analyses were performed to assess the effects of growth, weight status, and basketball experience on performance. After 10 weeks there was a significant increase in FFM (Fat-Free Mass) and a significant decrease in fat parameters. Moreover, between the two surveys, all motor tests significantly improved. The results of linear regression models showed that changes in %F (percentage of body fat) were significantly associated with speed and agility, while handgrip strength and weight status were associated with upper limb explosive strength. Basketball experience was a significant predictor of all three motor tests. In conclusion, body composition changes, years of experience, and weight status influenced physical performance and players’ motor skills ability, especially speed, agility, and upper limb explosive strength.
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The Role of Somatic Maturation on Bioimpedance Patterns and Body Composition in Male Elite Youth Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16234711. [PMID: 31779215 PMCID: PMC6926995 DOI: 10.3390/ijerph16234711] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/21/2019] [Accepted: 11/25/2019] [Indexed: 01/22/2023]
Abstract
The purpose of this study was to examine the influence of chronological age (CA) and somatic maturation on body composition (BC) and bioimpedance parameters in male elite soccer players. BC and bioimpedance variables were measured in a sample of 249 players aged 9-18 years of age and registered in two professional Italian soccer teams. Results from segmental analysis showed transition time points where the influence of CA and somatic maturation on bioimpedance patterns and BC characteristics increased or subsided. The accelerated phases were assessed for fat free mass, total body water, and upper muscle area, with a starting time point at approximately -2.00 years from peak at velocity (YPHV), and for body cell mass, whose developmental tempo sped up around -1.00 YPHV. An increase in the rate of development was also observed close to -2.00 YPHV for phase angle (PA), although without accelerated phases. From a CA point of view, significant slope changes were found for all BC and bioimpendance variables, except for the calf muscle area. Although the starting points and the span of the accelerated phases were different, they subsided or disappeared at ~ 15 years, except for PA, whose growth waned at ~ 17 years.
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Johnson DM, Williams S, Bradley B, Sayer S, Murray Fisher J, Cumming S. Growing pains: Maturity associated variation in injury risk in academy football. Eur J Sport Sci 2019; 20:544-552. [PMID: 31215359 DOI: 10.1080/17461391.2019.1633416] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reducing injuries to youth players is of primary importance to academies, as injuries can result in a significant loss in both training and match time, as well as, negatively affecting player development. In total, 76 talented young football players were analysed over two full competitive seasons. The injury incidence and burden for all non-contact and overuse injuries were recorded. Exposure was calculated as the total number of competitive matches hours played. Somatic maturation was estimated by expressing the current height of each player as a percentage of their predicted adult height [Roche, A. F., Tyleshevski, F., & Rogers, E. (1983). Non-invasive measurements of physical maturity in children. Research Quarterly for Exercise and Sport, 54(4), 364-371.]. The period of circa-peak height velocity (PHV) (24.5 injuries per 1000 h) was associated with a significantly higher injury incidence rate and burden compared to pre-PHV (11.5 injuries per 1000 h; RR:2.15, 95%CI:1.37-3.38, P < .001). No significant differences in injury risk between maturity timing groups were observed. The interaction effect between maturity status and maturity timing confirmed there is a risk period circa-PHV, but this was not dependent on maturity timing. The main practical application of this study is that football academies should regularly assess the maturity status of young footballers to identify those players with increased susceptibility to injury. Moreover, academies should individualise training and injury prevention strategies based on maturation.
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Affiliation(s)
- D M Johnson
- Department of Health, University of Bath, Bath, UK.,Academy Sports Science and Medical Department, AFC Bournemouth Football Club, Bournemouth, UK
| | - S Williams
- Department of Health, University of Bath, Bath, UK
| | - B Bradley
- Academy Sports Science and Medical Department, AFC Bournemouth Football Club, Bournemouth, UK
| | - S Sayer
- Academy Sports Science and Medical Department, AFC Bournemouth Football Club, Bournemouth, UK
| | - J Murray Fisher
- Academy Sports Science and Medical Department, AFC Bournemouth Football Club, Bournemouth, UK
| | - S Cumming
- Department of Health, University of Bath, Bath, UK
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McIntosh S, Kovalchik S, Robertson S. Multifactorial Benchmarking of Longitudinal Player Performance in the Australian Football League. Front Psychol 2019; 10:1283. [PMID: 31214087 PMCID: PMC6554430 DOI: 10.3389/fpsyg.2019.01283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 05/15/2019] [Indexed: 11/13/2022] Open
Abstract
This study aimed to develop a model to objectively benchmark professional Australian Rules football (AF) player performance based on age, experience, positional role and both draft type and round in the Australian Football League (AFL). The secondary aims were to identify the stage of peak performance and specific breakpoints in AF player performance longitudinally. AFL Player Ratings data were obtained for all players (n = 1052) from the 1034 matches played during the 2013–2017 seasons, along with data pertaining to the abovementioned player characteristics. Two separate linear mixed models revealed that all factors influenced player performance, with age and experience the strongest in each model, respectively. Post hoc Tukey tests indicated that performance was affected by age at each level up until the age of 21 (effect ranging from 0.98 to 3.70 rating points), and by experience at the levels 1–20 and 21–40 matches in comparison to all higher levels of experience (effect ranging from 1.01 to 3.77 rating points). Two segmented models indicated that a point of marginal gains exists within longitudinal performance progression between the age levels 22 and 23, and the experience levels 41–60 and 61–80 matches. Professional sporting organisations may apply the methods provided here to support decisions regarding player recruitment and development.
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Affiliation(s)
- Sam McIntosh
- Institute for Health & Sport, Victoria University, Melbourne, VIC, Australia.,Western Bulldogs Football Club, Melbourne, VIC, Australia
| | - Stephanie Kovalchik
- Institute for Health & Sport, Victoria University, Melbourne, VIC, Australia
| | - Sam Robertson
- Institute for Health & Sport, Victoria University, Melbourne, VIC, Australia.,Western Bulldogs Football Club, Melbourne, VIC, Australia
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Lovell R, Fransen J, Ryan R, Massard T, Cross R, Eggers T, Duffield R. Biological maturation and match running performance: A national football (soccer) federation perspective. J Sci Med Sport 2019; 22:1139-1145. [PMID: 31056279 DOI: 10.1016/j.jsams.2019.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 11/20/2018] [Accepted: 04/16/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVES To examine the influence of maturation and its interaction with playing position upon physical match performances in U15 footballers from a national federation. DESIGN Observational study. METHODS 278 male outfield players competing in a national tournament were assessed for somatic maturity and match physical performances according to playing position. Stature, sitting height, and body mass were measured and entered into an algorithm to estimate the age at peak height velocity (APHV). Players match movements were recorded by Global Positioning System devices (10 Hz), to determine peak speed, and total- (TD), low-speed running (LSR; ≤13.0 km h-1), high-speed running (HSR; 13.1-16.0 km h-1), very high-speed running (VHSR; 16.1-20.0 km h-1) and sprint distances (SPR; >20.0 km h-1) expressed relative to match exposure (m min-1). RESULTS Linear-mixed models using log transformed response variables revealed a significant contribution of estimated APHV upon TD (1.01; 95% CI: 0.99-1.02 m·min-1; p < 0.001), HSR (1.05; 95% CI: 0.98-1.13 m min-1; p < 0.001) and VHSR (1.07; 95% CI: 1.00-1.14 m min-1; p = 0.047). An increase by one year in APHV was associated with an increase of 0.6, 5.4 and 6.9% in TD, HSR and VHSR respectively. No effects of APHV were observed for LSR, SPR, and peak speed. Further, no APHV effects were observed relative to players' field position. CONCLUSIONS Later maturing players covered substantially more higher-intensity (HSR and VHSR) running in matches, irrespective of playing position. The greater match intensity of later maturing players may inform talent identification and athletic development processes within a national federation.
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Affiliation(s)
- Ric Lovell
- Western Sydney University, School of Science and Health, Australia.
| | - Job Fransen
- Sport & Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Australia
| | - Rhearne Ryan
- Western Sydney University, School of Science and Health, Australia
| | - Tim Massard
- Western Sydney University, School of Science and Health, Australia; Westfields Sports High School, Fairfield West, Australia
| | - Rebecca Cross
- Western Sydney University, School of Science and Health, Australia
| | - Tahleya Eggers
- Western Sydney University, School of Science and Health, Australia
| | - Rob Duffield
- Sport & Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Australia; Medical Department, Football Federation Australia, Australia
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47
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Till K, Morris R, Emmonds S, Jones B, Cobley S. Enhancing the Evaluation and Interpretation of Fitness Testing Data Within Youth Athletes. Strength Cond J 2018. [DOI: 10.1519/ssc.0000000000000414] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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