1
|
Oliver JL, Ramachandran AK, Singh U, Ramirez-Campillo R, Lloyd RS. The Effects of Strength, Plyometric and Combined Training on Strength, Power and Speed Characteristics in High-Level, Highly Trained Male Youth Soccer Players: A Systematic Review and Meta-Analysis. Sports Med 2024; 54:623-643. [PMID: 37897637 PMCID: PMC10978689 DOI: 10.1007/s40279-023-01944-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2023] [Indexed: 10/30/2023]
Abstract
BACKGROUND Male youth soccer players competing at a high level will typically engage in large volumes of soccer training from a young age. However, it is not known whether the high levels of habitual training that these high-performing players are exposed to limit their ability to respond to strength, plyometric or combined training interventions. OBJECTIVE The primary aim of our systematic review and meta-analysis was to compare the specific effects of strength, plyometric and combined training with active controls (standard soccer training) on the strength, power and speed characteristics of high-level, highly trained young male soccer players. METHODS We performed a literature search across PubMed, Scopus, CINAHL, Web of Science and SPORTDiscus to identify controlled studies that implemented strength, plyometric or combined training in high-level male youth soccer players. Participants were defined as high level or highly trained based on established guidelines related to either competition level or age-related weekly hours spent in soccer training. Studies needed to report at least one outcome of lower body strength, squat jump, countermovement jump, horizontal power, acceleration (0-10 m), speed (15-40 m) or change of direction speed. A meta-analysis was then performed using a random-effects model to determine the magnitude (Hedge's g) of training responses and whether effects differed across modes of training. RESULTS From an initial return of 5464 papers, n = 34 studies met the inclusion criteria and provided a total sample of n = 1396 high-level male youth soccer players. Strength, plyometric and combined training resulted in improvements in strength, squat and countermovement jump, horizontal power, acceleration, change of direction speed (all p < 0.05; g = 0.73-1.08, moderate) and speed (p < 0.05; g = 0.40-0.59, small). Lower body strength was the only outcome where training mode had a significant effect (p < 0.05), with plyometric training producing small effects (g = 0.27, p < 0.05) compared with moderate effects for strength (g = 1.07, p < 0.05) and combined (g = 0.75, p < 0.05) training. Prediction intervals for overall effects (all training modes combined) showed that the greatest confidence that future training will lead to positive effects was in the squat and countermovement jump, horizontal power and acceleration (prediction intervals = 0.03-1.81). CONCLUSIONS High-level, highly trained male youth soccer players can experience positive gains in indices of strength, power and speed from strength, plyometric and combined training, and the magnitude of gains are mostly similar across modes of training. Based on prediction intervals, there is a good level of certainty that future strength, plyometric and combined training in this population would lead to positive improvements in vertical and horizontal power and sprint acceleration.
Collapse
Affiliation(s)
- Jon L Oliver
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, CF23 6XD, UK.
- Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand.
| | - Akhilesh Kumar Ramachandran
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, CF23 6XD, UK
| | - Utkarsh Singh
- Sports and Exercise Science, College of Healthcare Sciences, James Cook University, Townsville, QLD, 4811, Australia
| | - Rodrigo Ramirez-Campillo
- Faculty of Rehabilitation Sciences, Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Universidad Andres Bello, 7591538, Santiago, Chile
| | - Rhodri S Lloyd
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, CF23 6XD, UK
- Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
| |
Collapse
|
2
|
Riansoi Y, Tongnillpant N, Thammawong S, Ribeiro J, Zacca R, Chainok P. Follow-Up Weekly Training Distribution and Accumulated Internal Load Effects on Young Football Players' Well-Being, Physical Fitness, and Technical Performance. Sports (Basel) 2024; 12:23. [PMID: 38251297 PMCID: PMC10818362 DOI: 10.3390/sports12010023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/26/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024] Open
Abstract
This study aimed to quantify the relationships among internal training load, wellness, physiological, isokinetic profile, and technical performance and assessed changes before and after a six-week pre-season structured combining physical fitness, small-sided-game and skill-based training program in young soccer players. Forty-five national-level young male soccer players (16.8 ± 0.9 years) were evaluated. There were no significant correlations between the wellness index and the physiological, isokinetic, or specific soccer skill parameters. Moderate correlations were observed between fatigue and stress (r = 0.47, moderate, p < 0.01), fatigue and average muscle soreness (r = 0.38, moderate, p = 0.01), and a large correlation between average stress and muscle soreness (r = 0.53, large, p < 0.01) were presented. All physiological, isokinetic, and technical parameters improved after a six-week pre-season training program (0.1 to -61.0%). Significant alterations in the physiological domain were observed after a six-week period, particularly in the fatigue index of the Bangsbo sprint test, YO-YO IR1 performance, and YO-YO peak La- (p < 0.01; -61.0%, 25.3%, and -19.8%, respectively). As such, the implementation of structured training and the monitoring of stress responses can lead to appropriate adaptation and balancing in the psychological and physical well-being of young national-level soccer players, particularly in the pre-season period.
Collapse
Affiliation(s)
- Yutthana Riansoi
- Faculty of Science, Chandrakasem Rajabhat University, Bangkok 10900, Thailand;
| | | | - Sakdarin Thammawong
- Faculty of Sport Science and Health, Thailand National Sports University, Udonthani Campus, Udonthani 12110, Thailand;
| | - João Ribeiro
- Center of Research, Education, Innovation and Intervention in Sports (CIFI2D), Faculty of Sports, University of Porto, 4099-002 Porto, Portugal;
| | - Rodrigo Zacca
- Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports, University of Porto (FADEUP), 4099-002 Porto, Portugal;
- Laboratory for Integrative and Translational Research in Population Health (ITR), 4050-600 Porto, Portugal
| | - Phornpot Chainok
- Faculty of Sports Science, Burapha University, Chonburi 20131, Thailand
| |
Collapse
|
3
|
Kierot M, Stendahl M, Warneke K, Wirth K, Konrad A, Brauner T, Keiner M. Maximum strength and power as determinants of on-ice sprint performance in elite U16 to adult ice hockey players. Biol Sport 2024; 41:245-252. [PMID: 38188105 PMCID: PMC10765453 DOI: 10.5114/biolsport.2024.129470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/24/2023] [Accepted: 05/19/2023] [Indexed: 01/09/2024] Open
Abstract
In ice hockey, speed strength is one of the major physical key performance indicators, which is significantly influenced by maximum strength. The objective of this study was to evaluate the age-dependent relationship of off-ice maximum strength and vertical jump performance with on-ice linear sprint performance, considering age and performance level. Ninety-one male youth and adult professional ice hockey players (age: 19.3 ± 5.49 years) were recruited and divided into four age groups: under 16, 18, 21 years old and professional elite players (Pro) (i.e., > 21 years). They were tested in maximal isometric strength, squat jump (loaded and unloaded), countermovement jump and on-ice sprint performance (15 m and 30 m linear sprint; 15 m flying linear sprint). Statistical analysis revealed that on-ice sprint performance correlated with isometric strength performance (r = |0.34|-|0.63|) and with off-ice jump performance (r = |0.61|-|0.77|) without an influence of age group or performance level. However, performance differed between age groups and performance level, the largest differences being found between the youngest age group (U16) and the Pro group (g = 0.966-3.281). The present study shows that maximum strength influences on-ice sprint performances in ice hockey players, as well as performance differences between age groups and professional players. Strength and jumping performance should therefore be included in regular performance testing in ice hockey. Since performance differences are observed for almost all strength and speed-strength performances of the youth teams to the Pros, training of these variables is strongly recommended to improve in the transition phase from junior to elite level.
Collapse
Affiliation(s)
- Martin Kierot
- Department of Exercise Science, German University of Health & Sport, Ismaning, Germany
- Department of Strength and Conditioning, ZSC/GCK Lions Ice-Hockey, Zürich, Swiss
| | - Mattia Stendahl
- Department of Strength and Conditioning, ZSC/GCK Lions Ice-Hockey, Zürich, Swiss
| | - Konstantin Warneke
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
| | - Klaus Wirth
- Faculty of Training and Sports Science, University of Applied Science Wiener Neustadt, Vienna, Austria
| | - Andreas Konrad
- Institute of Human Movement Science, Sport and Health, University of Graz, Graz, Austria
| | - Torsten Brauner
- Department of Biomechanics, German University of Health & Sport, Ismaning, Germany
| | - Michael Keiner
- Department of Exercise Science, German University of Health & Sport, Ismaning, Germany
| |
Collapse
|
4
|
Paulsen KM, McDermott BP, Myers AJ, Gray M, Lo WJ, Ganio MS. Reliability and Validity of the 30-15 Intermittent Field Test With and Without a Soccer Ball. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2023; 94:1001-1010. [PMID: 36027592 DOI: 10.1080/02701367.2022.2098230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Objective: The purpose of this study was to examine the reliability and validity of the 30-15 Intermittent Field Test (30-15IFT) with and without a ball. Methods: Twenty-four collegiate female soccer players (19.46 ± 1.22 years; 167.01 ± 7.23 cm; 60.95 ± 7.84 kg) performed 1 trial of the Yo-Yo Intermittent Recovery (YYIR) test, 3 trials of the 30-15IFT, and 3 trials of the 30-15IFT with a ball (30-15IFT-B), separated by a minimum 48 hours. Maximal intermittent running velocity (VIFT), heart rate at exhaustion (HRpeak), and rating of perceived exertion (RPE) were collected. Results: Intraclass correlation coefficients (ICCs) between trials demonstrated good reliability during the 30-15IFT in VIFT (ICC = 0.88) and HRpeak (ICC = 0.89), in addition to the 30-15IFT-B VIFT (ICC = 0.83) and HRpeak (ICC = 0.87). VIFT was significantly reduced in 30-15IFT-B (15.82 km h-1) compared to 30-15IFT (17.52 km h-1; p < .001), regardless of trial. HR and RPE were significantly greater in 30-15IFT compared to 30-15IFT-B (p < .05). Estimated maximal oxygen consumption (VO2max) YYIR and estimated VO2max of 30-15IFT and 30-15IFT-B was very strongly (r = 0.82) and strongly (r = 0.68) correlated. Conclusion: The 30-15IFT is considered valid and reliable and the 30-15IFT-B was reliable in female soccer players.
Collapse
|
5
|
Han M, Gómez-Ruano MA, Calvo AL, Calvo JL. Basketball talent identification: a systematic review and meta-analysis of the anthropometric, physiological and physical performance factors. Front Sports Act Living 2023; 5:1264872. [PMID: 38033652 PMCID: PMC10686286 DOI: 10.3389/fspor.2023.1264872] [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: 07/21/2023] [Accepted: 10/26/2023] [Indexed: 12/02/2023] Open
Abstract
Background The purpose of this study was to do a systematic review and meta-analysis about the anthropometric, physiological, and physical performance that discriminate the physical talent in basketball. Methods The search was conducted using the most relevant databases as Web of Science, PubMed, SPORTDiscus and Scopus, according to the PRISMA (2020) guideline. Keywords such as "basketball", "talented identification", "anthropometric", "physiology" and "physical performance" were used for the search, in English and following the "PICOS" question model. Eighteen articles' overall methodological quality was assessed using the Critical Review Forms. Results The study found in basketball, height, body mass, Yo-Yo test, T-test, 20 m sprint, and jump performance had statistical significance between elite and non-elite groups, including different positions and levels. Conclusions The reviewed literature highlighted a complicated relationship between anthropometric, physiological, and physical performance. Based on the results of the study, it's possible that height, body mass, agility, speed, endurance capacity, and lower lamb power could affect the early development of basketball.
Collapse
Affiliation(s)
- Miaoyu Han
- Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Madrid, Spain
| | | | | | | |
Collapse
|
6
|
McCalman W, Goddard SG, Fransen J, Crowley-McHattan ZJ, Bennett KJM. Experienced academy soccer coaches' perspectives on players' skilfulness. SCI MED FOOTBALL 2023:1-11. [PMID: 37933519 DOI: 10.1080/24733938.2023.2280230] [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] [Received: 03/08/2023] [Accepted: 10/31/2023] [Indexed: 11/08/2023]
Abstract
INTRODUCTION Soccer coaches are critical to academies as they are central to identifying players with the potential to succeed (i.e., talent). Research suggests coaches perceive skill as determining players' potential. Regardless, researchers only broadly explored their views and quantified players' skill using objective measures, which is problematic as coaches still rely on their subjective intuition. A plausible reason is that skill assessments do not meet coaches' needs. OBJECTIVE So,this study explored academy soccer coaches' perspectives on skilfulness. METHODS Participants required a minimum B-level AFC/FA Pro Coaching Licence and five years' experience for inclusion. Australian soccer coaches (n = 4) and academy directors (n = 7) (Mage = 35.90 ± 8.36 years; Mexperience = 14 ± 7.02 years) participated in semi-structured interviews (Mtime = 50.73 ± 7.33). RESULTS We analysed coaches' responses using reflexive thematic analysis, generating four themes describing skilful players as i) technically proficient, ii) adaptable, iii) effective decision-makers, and iv) influential to their team's success. We produced three themes on the situational and contextual nature of their views, perceiving skill through a v) developmental lens, relying on their vi) experiential knowledge, and their views were vii) context-specific. CONCLUSION Additional research is needed to create a refined conceptual model for assessing soccer skilfulness.
Collapse
Affiliation(s)
- William McCalman
- Physical Activity, Sport, and Exercise Research Theme, Faculty of Health, Southern Cross University, Lismore, Australia
| | - Scott G Goddard
- Physical Activity, Sport, and Exercise Research Theme, Faculty of Health, Southern Cross University, Lismore, Australia
| | - Job Fransen
- Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Human Performance Research Centre, School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney, Sydney, Australia
| | - Zachary J Crowley-McHattan
- Physical Activity, Sport, and Exercise Research Theme, Faculty of Health, Southern Cross University, Lismore, Australia
| | - Kyle J M Bennett
- Physical Activity, Sport, and Exercise Research Theme, Faculty of Health, Southern Cross University, Lismore, Australia
| |
Collapse
|
7
|
Čular D, Babić M, Zubac D, Kezić A, Macan I, Peyré-Tartaruga LA, Ceccarini F, Padulo J. Tensiomyography: from muscle assessment to talent identification tool. Front Physiol 2023; 14:1163078. [PMID: 37435303 PMCID: PMC10330706 DOI: 10.3389/fphys.2023.1163078] [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: 02/10/2023] [Accepted: 06/14/2023] [Indexed: 07/13/2023] Open
Abstract
Introduction: Tensiomyography (TMG) is a non-invasive and cost-effective tool that is gaining popularity in fields such as sports science, physical therapy, and medicine. In this narrative review, we examine the different applications of TMG and its strengths and limitations, including its use as a tool for sport talent identification and development. Methods: In the course of crafting this narrative review, an exhaustive literature search was carried out. Our exploration spanned several renowned scientific databases, such as PubMed, Scopus, Web of Science, and ResearchGate. The materials we sourced for our review included a broad spectrum of both experimental and non-experimental articles, all focusing on TMG. The experimental articles featured varied research designs including randomized controlled trials, quasi-experiments, as well as pre-post studies. As for the non-experimental articles, they encompassed a mix of case-control, cross-sectional, and cohort studies. Importantly, all articles included in our review were written in English and had been published in peer-reviewed journals. The assortment of studies considered provided a holistic view of the existing body of knowledge on TMG, and formed the basis of our comprehensive narrative review. Results: A total of 34 studies were included in the review, organized into three sections: 1) assessing muscle contractile properties of young athletes, 2) using TMG in the talent identification and development process and 3) Future research and perspectives. According to data presented here, the most consistent TMG parameters for determining muscle contractile properties are radial muscle belly displacement, contraction time, and delay time. Biopsy findings from the vastus lateralis (VL) confirmed TMG as a valid tool for estimating the ratio of myosin heavy chain (%MHC-I). Conclusion: TMGs ability to estimate the ratio of %MHC-I has the potential to aid in the selection of athletes with the muscle characteristics best suited for a particular sport, eliminating the need for more invasive procedures. However, more research is warranted to fully understand TMG's potential and its reliability when used with young athletes. Importantly, the use of TMG technology in this process can positively impact health status, reducing the frequency and severity of injuries and the duration of recovery, and subsequently can reduce drop out rates among youth athletes. Future studies should look at twin youth athletes, as a model capable of discriminating between the influence of hereditary factors vs. environmental factors, in therms of muscle contractility and TMG's potential for instance.
Collapse
Affiliation(s)
- Dražen Čular
- University of Split, Faculty of Kinesiology, Split, Croatia
- European Institute for Talents, Education, Research & Development, Split, Croatia
| | - Matej Babić
- University of Split, Faculty of Kinesiology, Split, Croatia
- Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia
| | - Damir Zubac
- University of Split, Faculty of Kinesiology, Split, Croatia
- Science and Research Center Koper, Institute for Kinesiology Research, Koper, Slovenia
- Department of Internal Medicine, Center for Integrated Oncology Aachen, Bonn, Cologne, Düsseldorf, University Hospital of Cologne, Cologne, Germany
| | - Ana Kezić
- University of Split, Faculty of Kinesiology, Split, Croatia
| | - Iva Macan
- Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia
- Faculty of Kinesiology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | | | - Francesco Ceccarini
- Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Johnny Padulo
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| |
Collapse
|
8
|
Čaušević D, Rani B, Gasibat Q, Čović N, Alexe CI, Pavel SI, Burchel LO, Alexe DI. Maturity-Related Variations in Morphology, Body Composition, and Somatotype Features among Young Male Football Players. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10040721. [PMID: 37189970 DOI: 10.3390/children10040721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/17/2023]
Abstract
The study aimed to investigate differences in anthropometry, body composition (BC), and somatotype in young football players of the same chronological age according to the maturity stage. Overall, 64 elite players (age: 14.28 ± 0.46 years) were evaluated for standing and sitting body height, girth measures, and BC using the bioelectric impedance scale and skinfold thickness. In total, two-thirds (73.44%, n = 47) of football players were classified as on-time maturers, 12.50% (n = 8) were early maturing, and 14.06% (n = 9) were late maturing. Standing and sitting height, leg length, fat-free mass, and muscle mass were significantly different (p < 0.001) across maturity groups. A significant decrease (p < 0.05) with maturity progression was seen for subscapular and suprailiac skinfolds along with a girth increase at all sites (p < 0.05). Early maturers were balanced ectomorphs, while on-time and late maturers featured mesomorph-ectomorph characteristics. The obtained results suggested that mature players have better BC presented as a lower fat percentage along with higher muscle mass, advantages in circumferences, and longitudinal dimensions of the body with highlighted mesomorph features. Maturity can have a substantial influence on body measures, thereby affecting sport-specific performance. Early maturers can use their anthropometric advantages and compensate for a lack of talent, consequently preventing even participation of physically undeveloped players in training. A better understanding of maturity, BC, and somatotypes can help in the selection of young talented players.
Collapse
Affiliation(s)
- Denis Čaušević
- Faculty of Sport and Physical Education, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina
| | - Babina Rani
- Department of Physical Rehabilitation & Medicine (Physiotherapy), Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Qais Gasibat
- Department of Sports Studies, Universiti Putra Malaysia UPM, Serdang 43400, Malaysia
| | - Nedim Čović
- Faculty of Sport and Physical Education, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina
| | - Cristina Ioana Alexe
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
| | - Silviu Ioan Pavel
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
| | - Lucian Ovidiu Burchel
- Department of Environmental Sciences, Physics, Physical Education and Sports Faculty of Sciences, Lucian Blaga University in Sibiu, 550024 Sibiu, Romania
| | - Dan Iulian Alexe
- Department of Physical and Occupational Therapy, Faculty of Movement, Sports and Health Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania
| |
Collapse
|
9
|
BEZUGLOV E, KHAITIN V, ZHOLINSKIY A, BARSKOVA E, KONEVA E, SHOSHORINA M, LAZAREV A. Physiological differences in elite and sub-elite young soccer players. GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE 2023. [DOI: 10.23736/s0393-3660.22.04725-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
10
|
McAuley AB, Hughes DC, Tsaprouni LG, Varley I, Suraci B, Baker J, Herbert AJ, Kelly AL. Genetic associations with technical capabilities in English academy football players: a preliminary study. J Sports Med Phys Fitness 2023; 63:230-240. [PMID: 35666584 DOI: 10.23736/s0022-4707.22.13945-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Technical capabilities have significant discriminative and prognostic power in youth football. Although, many factors influence technical performance, no research has explored the genetic contribution. As such, the purpose of this study was to examine the association of several single nucleotide polymorphisms (SNPs) with technical assessments in youth football players. METHODS Fifty-three male under-13 to under-18 outfield football players from two Category 3 English academies were genotyped for eight SNPs. Objective and subjective technical performance scores in dribbling, passing, and shooting were collated. Simple linear regression was used to analyse individual SNP associations each variable, whereas both unweighted and weighted total genotype scores (TGSs; TWGSs) were computed to measure the combined influence of all SNPs. RESULTS In isolation, the ADBR2 (rs1042714) C allele, BDNF (rs6265) C/C genotype, DBH (rs1611115) C/C genotype, and DRD1 (rs4532) C allele were associated with superior (8-10%) objective dribbling and/or shooting performance. The TGSs and/or TWGSs were significantly correlated with each technical assessment (except subjective passing), explaining up to 36% and 40% of the variance in the objective and subjective assessments, respectively. CONCLUSIONS The results of this study suggest inter-individual genetic variation may influence the technical capabilities of youth football players and proposes several candidate SNPs that warrant further investigation.
Collapse
Affiliation(s)
- Alexander B McAuley
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, UK -
| | - David C Hughes
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, UK
| | - Loukia G Tsaprouni
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, UK
| | - Ian Varley
- Department of Sport Science, Nottingham Trent University, Nottingham, UK
| | - Bruce Suraci
- Academy Coaching Department, AFC Bournemouth, Bournemouth, UK
| | - Joseph Baker
- School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Adam J Herbert
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, UK
| | - Adam L Kelly
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, UK
| |
Collapse
|
11
|
Body size, maturation and motor performance in young soccer players: relationship of technical actions in small-sided games. Biol Sport 2023; 40:51-61. [PMID: 36636197 PMCID: PMC9806756 DOI: 10.5114/biolsport.2023.110749] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/15/2021] [Accepted: 10/10/2021] [Indexed: 02/01/2023] Open
Abstract
The objective of this study was to investigate the relative contributions of body size, skeletal age, and motor performance variables with technical actions through an ecological model during small-sided soccer games, and the interaction of biological maturation with technical and motor performance in young players. In this cross-sectional study, eighty-two young players (14.4 ± 1.1 years), belonging to state-level soccer teams and divided by category (U-13 and U-15), were included. Players having an injury in the evaluation period were not included in the study. Measurements of body size, skeletal age (SA), motor tests, and technical actions in small-sided games (SSG) were performed (3 × 3 plus goalkeeper) in two periods (halves) of four minutes. Differences between age groups were found for SA (ES = -2.36), chronological age (ES = -3.89), body mass (ES = -2.09), height (ES = -1.90), and fat-free mass (ES = -2.09). Positive associations were found between body size (R = 0.43 to R = 0.48) and manipulation (R = 0.50 to R = 0.52) indicators and numbers of technical actions (CB and SS), except for stature with LB (R = -0.42) in the U-13 age group. In the U-15 category, skeletal age (R = -0.29 to R = -0.30) and body mass (R = -0.28 to R = -0.29) were negatively associated with the number of technical actions (RB, NB, LB, and OB) (P > 0.05) and positively with the balance with LB (R = 0.26). In conclusion, body size, SA, and motor performance influenced technical actions in SSG differentially in each category. U-13 heavier players and those with a better motor performance presented higher involvement due to the higher.
Collapse
|
12
|
Does maturity estimation, 2D:4D and training load measures explain physical fitness changes of youth football players? BMC Pediatr 2022; 22:726. [PMID: 36539728 PMCID: PMC9764734 DOI: 10.1186/s12887-022-03801-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES The purpose of the present study was two-fold: (1) To analyse physical fitness changes of youth football players after a full-season; and (2) to examine whether physical fitness changes are explainable by estimated maturity status, 2digit:4digit ratio (2D:4D) from each hand and training load (TL) measures. METHODS Twenty-seven youth elite Under-15 football players were daily monitored for training load measures during 38 weeks. At the beginning and at the end of the season, all players were assessed for physical fitness. Also, the maturity status estimation and the length of the second and fourth digits of both hands were collected at the beginning of the season. RESULTS Significant differences were found for all physical fitness measures after the season. The second and fourth digits of left and right hands had negative moderate correlations with change of direction (COD) changes (r=-.39 to - 0.45 | p = .05 to 0.02). Also, the maturity offset measure had negative moderate correlations with COD changes (r=-.40 | p = .04). From the reported significant correlations, the maturity offset, Left 4D, Right 2D and Right 4D significantly predicted the Mod.505 COD test changes (β = 0.41, p = .04; β = -0.41, p = .04; β = -0.45, p = .02; and β = -0.44, p = .03, respectively). CONCLUSION The maturity offset and the 2D:4D measures have the potential to predict COD performance changes over-time in youth football players. Given the lack of associations between the maturity estimation, 2D:4D and training load measures, with the overall physical fitness measures, coaches should rely only at COD changes.
Collapse
|
13
|
Kobal R, Carvalho L, Jacob R, Rossetti M, de Paula Oliveira L, Do Carmo EC, Barroso R. Comparison among U-17, U-20, and Professional Female Soccer in the GPS Profiles during Brazilian Championships. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16642. [PMID: 36554521 PMCID: PMC9779822 DOI: 10.3390/ijerph192416642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/22/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
The purpose of this study was to compare and characterize the physical demand of official matches among under-17 (U-17), under-20 (U-20), and professional (Pro) female soccer players. All matches were from the U-17, U-20, and Pro National Brazilian Championships. Fourteen Pro matches, nine U-20 matches, and four U-17 matches were analyzed. The external load was measured by the global positioning system (GPS) and the internal workload was assessed by the ratings of perceived exertion (RPE) multiplied by the duration of the match. The activity profiles measured were total distance covered (km), total sprint distance (m) (speed > 18 km·h-1), number of accelerations and decelerations (between 1 and 2 m·s-2 and >3 m·s-2), and top speed (km·h-1). For the analysis, we standardized all the metrics (except the top speed) by the time (in minutes) played. The Pro group presented higher sprint distances, number of accelerations and decelerations, and top speeds, compared to U-20 and U-17. There was no difference in the total distance among groups, and there was no difference in any GPS metrics between U-20 and U-17. The RPE was higher in Pro and U-17, compared to U-20; however, the workload-RPE was higher in Pro, compared to both U-17 and U-20 groups. These findings provide important information for the evolution of physical performance according to age categories in elite female soccer players.
Collapse
Affiliation(s)
- Ronaldo Kobal
- School of Physical Education, University of Campinas, Campinas 13083-851, Brazil
- Sport Club Corinthians Paulista, São Paulo 03087-000, Brazil
| | - Leonardo Carvalho
- School of Physical Education, University of Campinas, Campinas 13083-851, Brazil
| | - Raíssa Jacob
- Sport Club Corinthians Paulista, São Paulo 03087-000, Brazil
| | | | - Lucas de Paula Oliveira
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-900, Brazil
| | | | - Renato Barroso
- School of Physical Education, University of Campinas, Campinas 13083-851, Brazil
| |
Collapse
|
14
|
Ben Kahla A, Elghoul Y, Ammar A, Masmoudi L, Trabelsi K, Glenn JM, Dahmen R. Bilateral Training Improves Agility and Accuracy for Both Preferred and Non-Preferred Legs in Young Soccer Players. Percept Mot Skills 2022; 129:1804-1825. [PMID: 36054086 DOI: 10.1177/00315125221124373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
As laterality of the lower limbs is regarded as a relevant influence on soccer performance, we assessed whether a bilateral training program for both the preferred leg (PL) and non-preferred leg (NPL) would improve soccer players' lateral asymmetry, agility, and accuracy. Sixty right-foot-dominant young soccer players were randomly assigned to either an experimental group (EXP) that underwent bilateral training or a control group (CONT) that performed their usual training schedule without bilateral exercise. We assessed the players' lateral asymmetries before and after training on four soccer skill tasks: a zigzag test with and without a ball, a receiving and direct volley-shooting accuracy test, and a passing accuracy test. Results showed post-test versus pre-test performance improvements for the EXP group on the index of technical skills and agility (p < .001). A post-hoc analysis further revealed a pre-test to post-test performance improvement on shooting and passing accuracy with both legs only for the EXP group (p < .001). These results support the role of bilateral practice in improving lateral asymmetries, agility, and accuracy.
Collapse
Affiliation(s)
- Ahmed Ben Kahla
- Education, Motor Skills, Sports and Health (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia
| | - Yousri Elghoul
- Education, Motor Skills, Sports and Health (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia
| | - Achraf Ammar
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany.,Interdisciplinary Laboratory in Neurosciences, Physiology and Psychology, Physical Activity, Health and Learning (LINP2), UPL, UFR STAPS (Faculty of Sport Sciences), Paris Nanterre University, Nanterre, France
| | - Liwa Masmoudi
- Education, Motor Skills, Sports and Health (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia
| | - Khaled Trabelsi
- Education, Motor Skills, Sports and Health (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia
| | - Jordan M Glenn
- Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, USA
| | - Riadh Dahmen
- Education, Motor Skills, Sports and Health (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, 479822University of Sfax, Tunisia
| |
Collapse
|
15
|
Charbonnet B, Sieghartsleitner R, Schmid J, Zuber C, Zibung M, Conzelmann A. Maturity-based correction mechanism for talent identification: When is it needed, does it work, and does it help to better predict who will make it to the pros? J Sports Sci Med 2022; 21:640-657. [PMID: 36523901 PMCID: PMC9741715 DOI: 10.52082/jssm.2022.639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 11/30/2022] [Indexed: 12/30/2022]
Abstract
When identifying talent, the confounding influence of maturity status on motor performances is an acknowledged problem. To solve this problem, correction mechanisms have been proposed to transform maturity-biased test scores into maturity-unbiased ones. Whether or not such corrections also improve predictive validity remains unclear. To address this question, we calculated correlations between maturity indicators and motor performance variables among a sample of 121 fifteen-year-old elite youth football players in Switzerland. We corrected motor performance scores identified as maturity-biased, and we assessed correction procedure efficacy. Subsequently, we examined whether corrected scores better predicted levels of performance achievement 6 years after data collection (47 professionals vs. 74 non-professional players) compared with raw scores using point biserial correlations, binary logistic regression models, and DeLong tests. Expectedly, maturity indicators correlated with raw scores (0.16 ≤ | r | ≤ 0.72; ps < 0.05), yet not with corrected scores. Contrary to expectations, corrected scores were not associated with an additional predictive benefit (univariate: no significant r-change; multivariate: 0.02 ≤ ΔAUC ≤ 0.03, ps > 0.05). We do not interpret raw and corrected score equivalent predictions as a sign of correction mechanism futility (more work for the same output); rather we view them as an invitation to take corrected scores seriously into account (same output, one fewer problem) and to revise correction-related expectations according to initial predictive validity of motor variables, validity of maturity indicators, initial maturity-bias, and selection systems. Recommending maturity-based corrections is legitimate, yet currently based on theoretical rather than empirical (predictive) arguments.
Collapse
Affiliation(s)
- Bryan Charbonnet
- Institute of Sport Science, University of Bern, Bremgartenstrasse 145, CH-3012 Bern, Switzerland
| | | | | | | | | | | |
Collapse
|
16
|
Charbonnet B, Sieghartsleitner R, Schmid J, Zuber C, Zibung M, Conzelmann A. Maturity-based correction mechanism for talent identification: When is it needed, does it work, and does it help to better predict who will make it to the pros? J Sports Sci Med 2022. [DOI: 10.52082/jssm.2022.640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
When identifying talent, the confounding influence of maturity status on motor performances is an acknowledged problem. To solve this problem, correction mechanisms have been proposed to transform maturity-biased test scores into maturity-unbiased ones. Whether or not such corrections also improve predictive validity remains unclear. To address this question, we calculated correlations between maturity indicators and motor performance variables among a sample of 121 fifteen-year-old elite youth football players in Switzerland. We corrected motor performance scores identified as maturity-biased, and we assessed correction procedure efficacy. Subsequently, we examined whether corrected scores better predicted levels of performance achievement 6 years after data collection (47 professionals vs. 74 non-professional players) compared with raw scores using point biserial correlations, binary logistic regression models, and DeLong tests. Expectedly, maturity indicators correlated with raw scores (0.16 ≤ | r | ≤ 0.72; ps < 0.05), yet not with corrected scores. Contrary to expectations, corrected scores were not associated with an additional predictive benefit (univariate: no significant r-change; multivariate: 0.02 ≤ ΔAUC ≤ 0.03, ps > 0.05). We do not interpret raw and corrected score equivalent predictions as a sign of correction mechanism futility (more work for the same output); rather we view them as an invitation to take corrected scores seriously into account (same output, one fewer problem) and to revise correction-related expectations according to initial predictive validity of motor variables, validity of maturity indicators, initial maturity-bias, and selection systems. Recommending maturity-based corrections is legitimate, yet currently based on theoretical rather than empirical (predictive) arguments.
Collapse
|
17
|
Physical Fitness Variations between Those Playing More and Those Playing Less Time in the Matches: A Case-Control Study in Youth Soccer Players. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9111786. [PMID: 36421235 PMCID: PMC9689158 DOI: 10.3390/children9111786] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/16/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022]
Abstract
The purpose of this study was (i) to compare two groups (players with more vs. less match play time) regarding body composition, vertical and horizontal jumping performance, and aerobic capacity; and (ii) to test the relationships between physical fitness and play time. This study followed a case-control design in which the outcome was playtime, and the causal attribute was physical fitness. Sixty-six youth male soccer players from under-16 (n = 21), under-17 (n = 19), under-18 (n = 12), and under-19 (n = 14) age groups were monitored for match play time during five months of observation. Inclusion criteria consisted of (1) no absence of more than a week due to injury or other conditions during the five months of observation and (2) physical assessments having been done simultaneously with those of the other players (at the beginning of the season). The exclusion criteria were (1) not participating in one week or more of training sessions, and (2) not participating in the physical fitness assessments. At the beginning of the season, players were assessed for anthropometry (height, body mass, skinfolds), countermovement jump, triple hop bilateral and unilateral jump, and aerobic capacity using the Yo-Yo Intermittent Recovery Test, level 2 (YYIRT). The group that played more time had significantly greater YYIRT results (+28.2%; p = 0.009; Cohen’s d = 0.664). No other significant differences were found between those who played more and fewer minutes. Moderate and significant linear positive correlations were found between YYIRT and play time in the under-19 group (r = 0.423; p = 0.031) and overall (r = 0.401; p < 0.001). In the case of the under-17 group, moderate and significant linear positive correlations were found between TSA and play time (r = 0.473; p = 0.041). This suggests that aerobic and anaerobic capacity is related to play time while jumping performance and fat mass seem not to play an essential role in play time.
Collapse
|
18
|
Gundersen H, Riiser A, Algroy E, Vestbøstad M, Saeterbakken AH, Clemm HH, Grendstad H, Hafstad A, Kristoffersen M, Rygh CB. Associations between biological maturity level, match locomotion, and physical capacities in youth male soccer players. Scand J Med Sci Sports 2022; 32:1592-1601. [PMID: 36004501 PMCID: PMC9804799 DOI: 10.1111/sms.14225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 08/15/2022] [Accepted: 08/23/2022] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Biological maturity level has shown to affect sport performance in youths. However, most previous studies have used noninvasive methods to estimate maturity level. Thus, the main aim of the present study was to investigate the association between skeletal age (SA) as a measure of biological maturation level, match locomotion, and physical capacity in male youth soccer players. METHOD Thirty-eight Norwegian players were followed during two consecutive seasons (U14 and U15). Match locomotion was assessed with GPS-tracking in matches. SA, assessed by x-ray, physical capacities (speed, strength and endurance) and anthropometrics were measured in the middle of each season. Analysis of associations between SA, match locomotion, and physical capacities were adjusted for the potential confounding effect of body height and weight. RESULTS In matches, positive associations were found between SA and maximal speed and running distance in the highest speed zones. Further, SA was associated with 40 m sprint time and countermovement jump (CMJ) height, and with intermittent-endurance capacity after adjusting for body height (U14). Associations between SA and leg strength and power, and between SA and absolute VO2max were not significant after adjusting for body weight. There was no association between SA and total distance covered in matches. CONCLUSION Biological maturity level influence match locomotion and performance on physical capacity tests. It is important that players, parents and coaches are aware of the advantages more mature players have during puberty, and that less mature players also are given attention, appropriate training and match competition to ensure proper development.
Collapse
Affiliation(s)
- Hilde Gundersen
- Department of Sport, Food and Natural SciencesWestern Norway University of Applied Sciences, Campus BergenBergenNorway
| | - Amund Riiser
- Department of Sport, Food and Natural SciencesWestern Norway University of Applied Sciences, Campus SogndalSogndalNorway
| | | | - Mona Vestbøstad
- Department of Health and FunctioningWestern Norway University of Applied Sciences, Campus BergenBergenNorway
| | - Atle H. Saeterbakken
- Department of Sport, Food and Natural SciencesWestern Norway University of Applied Sciences, Campus SogndalSogndalNorway
| | - Hege Havstad Clemm
- Department of Pediatric and Adolescent MedicineHaukeland University HospitalBergenNorway,Department of Clinical ScienceUniversity of BergenBergenNorway
| | - Halvard Grendstad
- Department of Physical PerformanceNorwegian School of Sport SciencesOsloNorway
| | - Arild Hafstad
- Department of Sport, Food and Natural SciencesWestern Norway University of Applied Sciences, Campus BergenBergenNorway
| | - Morten Kristoffersen
- Department of Sport, Food and Natural SciencesWestern Norway University of Applied Sciences, Campus BergenBergenNorway
| | - Cecilie Brekke Rygh
- Department of Health and FunctioningWestern Norway University of Applied Sciences, Campus BergenBergenNorway
| |
Collapse
|
19
|
Kelly AL, Williams CA, Cook R, Sáiz SLJ, Wilson MR. A Multidisciplinary Investigation into the Talent Development Processes at an English Football Academy: A Machine Learning Approach. Sports (Basel) 2022; 10:159. [PMID: 36287772 PMCID: PMC9611883 DOI: 10.3390/sports10100159] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/23/2022] [Accepted: 10/13/2022] [Indexed: 08/13/2023] Open
Abstract
The talent development processes in youth football are both complex and multidimensional. The purpose of this two-fold study was to apply a multidisciplinary, machine learning approach to examine: (a) the developmental characteristics of under-9 to under-16 academy players (n = 98; Study 1), and (b) the characteristics of selected and deselected under-18 academy players (n = 18; Study 2). A combined total of 53 factors cumulated from eight data collection methods across two seasons were analysed. A cross-validated Lasso regression was implemented, using the glmnet package in R, to analyse the factors that contributed to: (a) player review ratings (Study 1), and (b) achieving a professional contract (Study 2). Results showed non-zero coefficients for improvement in subjective performance in 15 out of the 53 analysed features, with key findings revealing advanced percentage of predicted adult height (0.196), greater lob pass (0.160) and average dribble completion percentage (0.124), more total match-play hours (0.145), and an older relative age (BQ1 vs. BQ2: -0.133; BQ1 vs. BQ4: -0.060) were the most important features that contributed towards player review ratings. Moreover, PCDEQ Factor 3 and an ability to organise and engage in quality practice (PCDEQ Factor 4) were important contributing factors towards achieving a professional contract. Overall, it appears the key factors associated with positive developmental outcomes are not always technical and tactical in nature, where coaches often have their expertise. Indeed, the relative importance of these factors is likely to change over time, and with age, although psychological attributes appear to be key to reaching potential across the academy journey. The methodological techniques used here also serve as an impetus for researchers to adopt a machine learning approach when analysing multidimensional databases.
Collapse
Affiliation(s)
- Adam L. Kelly
- Research Centre for Life and Sport Sciences (CLaSS), Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham B15 3TN, West Midlands, UK
| | - Craig A. Williams
- Children’s Health and Exercise, Research Centre and Sport and Health Sciences, College of Life & Environmental Sciences, University of Exeter, Exeter EX1 2LU, Devon, UK
| | - Rob Cook
- Research Centre for Life and Sport Sciences (CLaSS), Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham B15 3TN, West Midlands, UK
| | | | - Mark R. Wilson
- Children’s Health and Exercise, Research Centre and Sport and Health Sciences, College of Life & Environmental Sciences, University of Exeter, Exeter EX1 2LU, Devon, UK
| |
Collapse
|
20
|
Papadakis Z, Panoutsakopoulos V, Kollias IA. Predictive Value of Repeated Jump Testing on Nomination Status in Professional and under 19 Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13077. [PMID: 36293658 PMCID: PMC9602553 DOI: 10.3390/ijerph192013077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/04/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Soccer clubs invest time and money in multidimensional identification practices, but the field implementation is still problematic. The repeated vertical jump test (RVJ), as an alternative to the monodimensional vertical jump, may offer similar prognostic value. Therefore, the prognostic validity of 15 RVJ within professional (PRO, n = 24) and under 19 years old (U19, n = 20) Greek male soccer players was examined. T-test, binomial logistic regression, and receiver operating characteristic for prognostic validity of anthropometric and performance values in predicting PRO status were applied using Jamovi version 2.3.3.0. Significant group differences presented in body height and mass, body mass index (BMI), maximum and average jump height, and relative jump power. The predicting model was significant (x2(2) = 17.12, p < 0.001). Height and BMI were positive predictors of the PRO status (b = 21.66, p = 0.008 and b = 0.94, p = 0.014, respectively). The model was 73% accurate, 75% specific, and 71% sensitive, with excellent area under the curve. The RVJ test demonstrated outstanding discriminating prognostic validity. Until the applicability of the multidimensional models in predicting future player status is further established, field practitioners may use the simplistic RVJ testing to predict future status among male soccer players.
Collapse
Affiliation(s)
- Zacharias Papadakis
- Human Performance Laboratory, Department of Health Promotion and Clinical Practice, College of Health and Wellness, Barry University, Miami Shores, FL 33161, USA
| | - Vassilios Panoutsakopoulos
- Biomechanics Laboratory, School of Physical Education and Sports Sciences at Thessaloniki, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Iraklis A. Kollias
- Biomechanics Laboratory, School of Physical Education and Sports Sciences at Thessaloniki, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| |
Collapse
|
21
|
Soós I, Borysławski K, Boraczyński M, Ihasz F, Podstawski R. Anthropometric and Physiological Profiles of Hungarian Youth Male Soccer Players of Varying Ages and Playing Positions: A Multidimensional Assessment with a Critical Approach. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11041. [PMID: 36078756 PMCID: PMC9518191 DOI: 10.3390/ijerph191711041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/27/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND This study aimed to create preliminary anthropometric and physiological profiles of Hungarian male soccer players belonging to different age categories (14, 15, 16, and 17-18-years) and assigned to different playing positions (forward, defender, midfielder, goalkeeper). METHODS Anthropometric and physiological profiles were created for four age groups: 14- (n = 20), 15- (n = 16), 16- (n = 22) and 17-18-year-olds (n = 23) representing the Hungarian soccer academy. Additionally, the variables were analyzed across the four player positions mentioned above. RESULTS The mean values of body mass, fat mass and BMI were within normal limits, although in some cases the anthropometric and body composition values were too high, particularly among the 17-18-year-olds. The mean values of HRrest were lowest among the 15-year-olds. The highest mean and maximal values of rVO2max and rVO2/AT [57.6 ± 8.12 (43.8-68.3) and 51.2 ± 7.24 (38.9-60.8) mL/kg/min, respectively] were noted in 14-year-olds. Goalkeepers performed significantly better than the remaining soccer players in terms of the most anthropometric and physiological characteristics, except for the Yo-Yo test (p < 0.001). CONCLUSIONS The values of anthropometric parameters increased with age. As expected, the oldest group achieved the best results in the performance tests. Goalkeepers outperformed the players representing other playing positions in the tests when assessing lower limb strength, sprint performance (5- and 10-m distance), and agility tests. From a practical point of view, the presented anthropometric and physiological profiles of players representing different age groups and playing positions can be useful for soccer coaches, strength and conditioning specialists, and athletic trainers of other soccer clubs in terms of the individualization and optimalization of soccer training.
Collapse
Affiliation(s)
- Imre Soós
- Faculty of Health Sciences, Doctoral School of Health Sciences, University of Pécs, H-7622 Pécs, Hungary
| | | | - Michał Boraczyński
- Faculty of Health Sciences, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
| | - Ferenc Ihasz
- Faculty of Psychology and Pedagogy, Institute of Sports Sciences, Eötvös Lóránd University, 9700 Szombathely, Hungary
| | - Robert Podstawski
- Department of Tourism, Recreation and Ecology, University of Warmia and Mazury in Olsztyn, 10-957 Olsztyn, Poland
| |
Collapse
|
22
|
Jung JY. Physical giftedness/talent: A systematic review of the literature on identification and development. Front Psychol 2022; 13:961624. [PMID: 36092065 PMCID: PMC9460770 DOI: 10.3389/fpsyg.2022.961624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 07/19/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, a systematic review was undertaken of the international scholarly literature on the identification and development of giftedness/talent in the physical domain, to establish the scope of current knowledge in the area. To identify relevant research, a search that involved the creation of a search string and the manual examination of the titles and abstracts of potentially relevant research, was conducted using two databases-Web of Science Core Collection and SportDiscus-and six inclusion/exclusion criteria (i.e., relevance to identification or development of physical giftedness/talent, an empirical study, publication in a reputable academic peer-reviewed journal, publication from 2000 to 2021, an English language publication, and authorship by scholars based in any part of the world). The 101 journal articles that met the inclusion/exclusion criteria were analyzed for key details, including the year of publication, methodological approaches, participants, and major findings. The five broad themes that emerged from the findings of these articles related to conceptions of physical giftedness/talent, identification characteristics/criteria, factors associated with identification, identification methods, and talent development interventions. An outline and discussion of the key issues and trends in the research, along with some recommendations for future research, conclude the systematic review.
Collapse
Affiliation(s)
- Jae Yup Jung
- School of Education, University of New South Wales, Sydney, NSW, Australia
| |
Collapse
|
23
|
Ramirez-Campillo R, Moran J, Oliver JL, Pedley JS, Lloyd RS, Granacher U. Programming Plyometric-Jump Training in Soccer: A Review. Sports (Basel) 2022; 10:sports10060094. [PMID: 35736834 PMCID: PMC9230747 DOI: 10.3390/sports10060094] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 05/25/2022] [Accepted: 06/07/2022] [Indexed: 12/26/2022] Open
Abstract
The aim of this review was to describe and summarize the scientific literature on programming parameters related to jump or plyometric training in male and female soccer players of different ages and fitness levels. A literature search was conducted in the electronic databases PubMed, Web of Science and Scopus using keywords related to the main topic of this study (e.g., “ballistic” and “plyometric”). According to the PICOS framework, the population for the review was restricted to soccer players, involved in jump or plyometric training. Among 7556 identified studies, 90 were eligible for inclusion. Only 12 studies were found for females. Most studies (n = 52) were conducted with youth male players. Moreover, only 35 studies determined the effectiveness of a given jump training programming factor. Based on the limited available research, it seems that a dose of 7 weeks (1−2 sessions per week), with ~80 jumps (specific of combined types) per session, using near-maximal or maximal intensity, with adequate recovery between repetitions (<15 s), sets (≥30 s) and sessions (≥24−48 h), using progressive overload and taper strategies, using appropriate surfaces (e.g., grass), and applied in a well-rested state, when combined with other training methods, would increase the outcome of effective and safe plyometric-jump training interventions aimed at improving soccer players physical fitness. In conclusion, jump training is an effective and easy-to-administer training approach for youth, adult, male and female soccer players. However, optimal programming for plyometric-jump training in soccer is yet to be determined in future research.
Collapse
Affiliation(s)
- Rodrigo Ramirez-Campillo
- Exercise and Rehabilitation Sciences Laboratory, School of Physical Therapy, Faculty of Rehabilitation Sciences, University Andres Bello, Santiago 7591538, Chile;
| | - Jason Moran
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Essex CO4 3SQ, UK;
| | - Jon L. Oliver
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF23 6XD, UK; (J.L.O.); (J.S.P.); (R.S.L.)
| | - Jason S. Pedley
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF23 6XD, UK; (J.L.O.); (J.S.P.); (R.S.L.)
| | - Rhodri S. Lloyd
- Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF23 6XD, UK; (J.L.O.); (J.S.P.); (R.S.L.)
| | - Urs Granacher
- Division of Training and Movement Sciences, University of Potsdam, Am Neuen Palais 10, Building 12, 14469 Potsdam, Germany
- Correspondence:
| |
Collapse
|
24
|
Toselli S, Mauro M, Grigoletto A, Cataldi S, Benedetti L, Nanni G, Di Miceli R, Aiello P, Gallamini D, Fischetti F, Greco G. Assessment of Body Composition and Physical Performance of Young Soccer Players: Differences According to the Competitive Level. BIOLOGY 2022; 11:biology11060823. [PMID: 35741344 PMCID: PMC9219641 DOI: 10.3390/biology11060823] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 11/24/2022]
Abstract
Soccer is a multifactorial sport, in which players are expected to possess well developed physical, psychological, technical, and tactical skills. Thus, the anthropometric and fitness measures play a determinant role and could vary according to the competitive level. Therefore, the present study aimed to verify differences in body composition and physical performance between two soccer team. 162 young soccer players (from the Under 12 to Under 15 age categories; age: 13.01 ± 1.15 years) of different competitive levels (elite—n = 98 and non-elite—n = 64) were recruited. Anthropometric characteristics (height, weight, lengths, widths, circumferences, and skinfold thicknesses (SK)), bioelectrical impedance, physical performance test as countermovement jump (CMJ), 15 m straight-line sprints, Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo), and 20 + 20 m repeated-sprint ability (RSA)) were carried out. In addition, Body mass index (BMI), body composition parameters (percentage of fat mass (%F), Fat mass (FM, kg), and Fat-free mass (FFM, kg)) and the areas of the upper arm, calf and thigh were calculated, and the Bioelectric Impedance Vector Analysis (BIVA) procedures were applied. In addition, a linear discriminant analysis was assessed to determine which factors better discriminate between an elite and non-elite football team. Many differences were observed in body composition between and within each football team’s category, especially in triceps SK (p < 0.05), %F (p < 0.05), and all performance tests (p < 0.01). The canonical correlation was 0.717 (F(7,128) = 19.37, p < 0.0001), and the coefficients that better discriminated between two teams were 15 m sprint (−2.39), RSA (1−26), suprailiac SK (−0.5) and CMJ (−0.45). Elite soccer team players present a better body composition and greater physical efficiency. In addition, BIVA outcome could be a relevant selection criterion to scout among younger soccer players.
Collapse
Affiliation(s)
- Stefania Toselli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy;
| | - Mario Mauro
- Department for Life Quality Studies, University of Bologna, 47921 Rimini, Italy;
| | - Alessia Grigoletto
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy;
- Correspondence: (A.G.); (S.C.)
| | - Stefania Cataldi
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy; (F.F.); (G.G.)
- Correspondence: (A.G.); (S.C.)
| | - Luca Benedetti
- Bologna F.C. 1909 Technical Center, 40128 Bologna, Italy; (L.B.); (P.A.)
| | - Gianni Nanni
- Isokinetic Research Center, 40132 Bologna, Italy; (G.N.); (R.D.M.)
| | | | - Paolo Aiello
- Bologna F.C. 1909 Technical Center, 40128 Bologna, Italy; (L.B.); (P.A.)
| | | | - Francesco Fischetti
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy; (F.F.); (G.G.)
| | - Gianpiero Greco
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy; (F.F.); (G.G.)
| |
Collapse
|
25
|
Methodological Approaches to Talent Identification in Team Sports: A Narrative Review. Sports (Basel) 2022; 10:sports10060081. [PMID: 35736821 PMCID: PMC9227581 DOI: 10.3390/sports10060081] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/04/2023] Open
Abstract
Talent identification (TID) and talent development (TD) continue to receive significant investment from team sports organisations, highlighting their importance in attempting to identify potential elite athletes. Accompanying this continual pursuit to unearth future talent is an ever-increasing body of research aiming to provide solutions and strategies to optimise TID and TD processes. Therefore, the aim of this review is to provide a summary and critical synthesis of the methodological approaches applied to TID in team sports and present considerations for future TID research. Specifically, this review highlights three key areas for consideration: (1) the timespan of the research design; (2) the use of monodisciplinary or multidisciplinary variables; and (3) the fidelity of the methodological approaches to the assessment of talent. The review highlights the benefits of longitudinal, multidisciplinary, and ecologically valid research designs for TID within team sports.
Collapse
|
26
|
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.
Collapse
Affiliation(s)
- Koulla Parpa
- Sport and Exercise Science, UCLan University of Cyprus, Pyla 7080, Cyprus;
| | | |
Collapse
|
27
|
Noronha F, Canossa S, Vilas-Boas JP, Afonso J, Castro F, Fernandes RJ. Youth Water Polo Performance Determinants: The INEX Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19094938. [PMID: 35564332 PMCID: PMC9100143 DOI: 10.3390/ijerph19094938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 02/04/2023]
Abstract
Due to the growing engagement of youth in water polo practice, we aimed to characterize age-grouped players across anthropometric, general and specific motor abilities and contextual domains. We have also examined the associations of players' specific skills with their anthropometric and general motor characteristics. One-hundred-and-one male water polo players, grouped into 12-, 13- and 14-year age cohorts were recruited. One-way ANOVA explained age-cohort variance, and a multiple linear regression was used to assess the association between variables. The variance in cohorts was explained by arm span (25%), stature, hand breadth and length (17%) fat-free mass (18%), 20 m sprint (16%), sit-ups (18%), medicine ball throw (27%), anaerobic (31%) and aerobic performance (21%), change of direction (18%), and in-water vertical jump (14%). The variance of in-water vertical jump, 10 m sprint, change of direction and aerobic fitness for players' anthropometric characteristics were, 32, 25, 14 and 10% (respectively). The players' upper-limb explosive power explained 30, 22 and 17% of variance for in-water vertical jump, 10 m sprint and aerobic fitness, respectively. Body mass had an inverse, and arm span had a direct association with in-water vertical jump and swim velocity capability, arm span had an inverse and direct association with change of direction and aerobic fitness, respectively. The upper limbs' explosive power related directly to in-water vertical jump and aerobic fitness skills, but inversely with 10 m sprint scores.
Collapse
Affiliation(s)
- Francisco Noronha
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal; (F.N.); (S.C.); (J.P.V.-B.); (J.A.)
- Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal
| | - Sofia Canossa
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal; (F.N.); (S.C.); (J.P.V.-B.); (J.A.)
- Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal
| | - João P. Vilas-Boas
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal; (F.N.); (S.C.); (J.P.V.-B.); (J.A.)
- Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal
| | - José Afonso
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal; (F.N.); (S.C.); (J.P.V.-B.); (J.A.)
| | - Flávio Castro
- Aquatic Sport Research Group, Universidade Federal do Rio Grande do Sul, Porto Alegre 90690-200, Brazil;
| | - Ricardo J. Fernandes
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal; (F.N.); (S.C.); (J.P.V.-B.); (J.A.)
- Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal
- Correspondence:
| |
Collapse
|
28
|
Effect of the COVID-19 Confinement Period on Selected Neuromuscular Performance Indicators in Young Male Soccer Players: Can the Maturation Process Counter the Negative Effect of Detraining? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19094935. [PMID: 35564333 PMCID: PMC9105184 DOI: 10.3390/ijerph19094935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 04/14/2022] [Accepted: 04/16/2022] [Indexed: 12/16/2022]
Abstract
The COVID-19 outbreak has led to an unprecedented long-term cessation in athletes’ training routines. This study examined the effect of a 32-week detraining period, caused by the COVID-19 pandemic lockdown, on selected neuromuscular performance indicators in 29 young male soccer players, assessed close to their adolescent growth spurt (age = 13.0 ± 0.8 years). Change of direction ability of both lower limbs (COD), linear sprint times (10 and 20 m), and vertical jump height (CMJ) was evaluated twice, once before the first national lockdown, and one week after the return to training activities. Paired-sample t-tests detected significant improvements in all three testing variables (COD: 2.82 ± 0.23 vs. 2.66 ± 0.22 s, p ≤ 0.005, 0.001, effect size [ES] = 0.91 to 1.05 for the right and left limb, respectively; 10 m: 2.12 ± 0.16 vs. 1.96 ± 0.15 s, p ≤ 0.001, effect size [ES] = 1.67, 20 m: 3.56 ± 0.3 vs. 3.42 ± 0.27 s, p ≤ 0.001, effect size [ES] = 1.02 and CMJ: 23.3 ± 7.5 vs. 24.5 ± 7.6 cm, p = 0.033, ES = 0.42). These results indicate that maturation-related adaptations can lead to enhanced change of direction, linear sprint, and vertical jump performance, even in the absence of exposure to any level of exercise. Soccer coaches and practitioners working with youth athletes should consider the stage of maturation when planning and implementing training programs aiming to enhance neuromuscular performance.
Collapse
|
29
|
Eskandarifard E, Nobari H, Clemente FM, Silva R, Silva AF, Figueiredo AJ. Associations between match participation, maturation, physical fitness, and hormonal levels in elite male soccer player U15: a prospective study with observational cohort. BMC Pediatr 2022; 22:196. [PMID: 35410178 PMCID: PMC8996429 DOI: 10.1186/s12887-022-03257-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/31/2022] [Indexed: 11/19/2022] Open
Abstract
Objectives The aims of this study were to analyze the relationships between minutes of play (MP) and maturity status, fitness, and hormonal levels and to explain how those measures influence the time of play. Methods Twenty-six youth soccer players U15 participated in this study over a full-season period. Anthropometric measures, maturity status, growth hormone (GH), insulin-like growth factor and physical levels such as maximal oxygen uptake (VO2max), fatigue index, countermovement jump (CMJ) performance were collected. At the end-season, players were assessed in 6 different tests over four days. Results VO2max largely correlated with GH (r = 0.57) and CMJ (r = 0.51). Also, GH largely correlated with CMJ (r = 0.55). MP had moderate correlations with VO2max (r = 0.44) and CMJ (r = 0.42). Multiple linear regression with maturation, physical fitness and hormonal levels explained R2 of 0.62 of the MP (F (8, 17) = 3.47, p = 0.015). Although each independent variable alone was not able to determine the playing time, when using the interactions, the model significantly explained the MP. Conclusions The combination of maturity status, physical fitness, and hormonal levels seem to play a determinant role in explaining the match participation in youth soccer players.
Collapse
Affiliation(s)
- Ebrahim Eskandarifard
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan, 81746-7344, Iran.,Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Hadi Nobari
- Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran. .,Sports Scientist, Sepahan Football Club, Isfahan, 81887-78473, Iran. .,Department of Physiology, Faculty of Sport Sciences, University of Extremadura, Cáceres, 10003, Spain.
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, 4900-347, Portugal.,Instituto de Telecomunicações, Delegação da Covilhã, Lisboa, 1049-001, Portugal
| | - Rui Silva
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, 4900-347, Portugal.,Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, 4960-320, Portugal
| | - Ana Filipa Silva
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, 4900-347, Portugal.,Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, 4960-320, Portugal.,The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, 5001-801, Portugal
| | | |
Collapse
|
30
|
Reliability and validity of a modified Illinois change-of-direction test with ball dribbling speed in young soccer players. Biol Sport 2022; 39:295-306. [PMID: 35309542 PMCID: PMC8919884 DOI: 10.5114/biolsport.2022.104917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/09/2021] [Accepted: 03/04/2021] [Indexed: 11/17/2022] Open
Abstract
The purpose of this study was to assess test-retest reliability, discriminative and criterion-related validity of the modified Illinois change-of-direction (CoD) test with ball dribbling-speed (ICODT-BALL) in young soccer players of different biological maturity and playing levels. Sixty-five young male soccer players (11.4 ± 1.2 years) participated in this study. The participants were classified according to their biological maturity (pre- and circumpeak height velocity [PHV]) and playing-level (elite and amateur players). During the test-retest time period of two weeks, the following tests were performed during week one and as retest during week two: ICODT-BALL, ICODT, 4 × 9-m shuttle-run, countermovement-jump, triple-hop-test, maximum-voluntary isometric-contraction of back-extensors, Stork, Y-Balance, 10 and 30-m sprints. The ICODT-BALL showed excellent relative (r = 0.995, p < 0.001; ICC = 0.993) and absolute (SEM < 5%; SEM < SWCs(0.2, 0.6, 1.2)) reliability. The circum-PHV (22.8 ± 1.7-s) and elite (22.5 ± 0.9-s) players showed better ICODT-BALL performance than their pre-PHV (24.2 ± 2.5-s) and amateur (25.1 ± 2.8-s) counterparts (p = 0.028 and p < 0.001, respectively). The ICODT-BALL showed "very good" (AUC = 0.81) discriminant validity when comparing the elite and amateur players, and "moderate" (AUC = 0.67) discriminant validity when compared to pre-PHV and circum-PHV boys. ICODT-BALL demonstrated "large" positive associations with the ICODT (r = 0.65; 41.8% shared-variance) and sprint tests (r ≥ 0.52; 27.3 to 34.8% shared-variance). In addition, results showed "moderate" negative associations between ICODT-BALL and strength, and power measures, as well as a "small" negative relationship with balance tests. In conclusion, the ICODT-BALL is a valid and reliable test to evaluate the ability to quickly change directions while ball dribbling in young soccer players. Therefore, practitioners can use the ICODT-BALL as a tool for talent identification.
Collapse
|
31
|
Body Composition Interactions with Physical Fitness: A Cross-Sectional Study in Youth Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19063598. [PMID: 35329288 PMCID: PMC8950089 DOI: 10.3390/ijerph19063598] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/15/2022] [Accepted: 03/17/2022] [Indexed: 02/05/2023]
Abstract
This study aimed to: (i) analyze fat mass and physical fitness variations among age-groups and playing positions, and (ii) explore the relationship between fat mass and physical fitness in youth male soccer players. A total of 66 players from under-16, under-17, and under-19 were tested. Body mass, skinfolds, countermovement jump (CMJ), single-leg triple hop jump (SLTH), bilateral triple hop jump (BTH), and yo-yo intermittent recovery Level 2 (YYIR-2) were assessed. A two- and one-way ANOVA were conducted, and the effect size was measured. Interactions were found in skin folds and fat mass. The under-19 group was taller, heavier, with a greater BMI and muscle mass than the under-16 group. They also exceeded the under-16 and under-17 in SLTH, BTH, and YYIRT-2. The under-17 group jumped higher and longer than under-16 group. Goalkeepers were taller and heavier than the midfielders. Central defenders were taller and had more muscle mass than midfielders and were heavier than the midfielders and wingers. The wingers jumped higher than the midfielders and showed better YYIRT-2. BMI was small correlated with YYIRT-2 and moderately with CMJ. Fat mass had a moderate negative correlation with CMJ and YYIRT-2. Muscle mass largely correlated with CMJ, UTH, very large with BTH and moderate with YYIRT-2. Summarily, with increasing age, better performances and body compositions were registered. Muscle mass better influences performance than body fat. Body composition can distinguish players positions.
Collapse
|
32
|
Exploring interactions between maturity status and playing time with fluctuations in physical fitness and hormonal markers in youth soccer players. Sci Rep 2022; 12:4463. [PMID: 35296744 PMCID: PMC8927162 DOI: 10.1038/s41598-022-08567-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 02/25/2022] [Indexed: 11/24/2022] Open
Abstract
The purpose of this study was to determine the differences in functional capacities and hormonal indices according to biological maturity and seasonal playing time status in young soccer players. Twenty-three male under-15 players (14.6 ± 0.2 years) were divided into two groups, based on their maturity status and seasonal playing time. They were measured for anthropometrics, Yo-Yo intermittent recovery level 1 (YYIR1), seven repeated sprint test (7RST), countermovement jump (CMJ), skeletal age, growth hormone, and insulin-like growth factor-1 (IGF-1) level. Age at peak height velocity (APHV) was determined to estimate the maturity timing. The results revealed that players who advanced in maturation were significantly heavier (p = 0.029) and had higher values in skeletal age (p < 0.001), sitting height (p = 0.005), CMJ (p = 0.038), and IGF-1 (p = 0.013). Players given greater playing time exhibited significantly lower fatigue index (p = 0.012), but higher CMJ (p = 0.003) and IGF-1 (p = 0.001) values. The overall results highlighted that early-maturing players and players with greater playing time obtained higher values in both CMJ and IGF-1. The findings may provide an insight on the coaches’ evaluation of players and on the possible factors that may affect the future playing status of young male soccer players.
Collapse
|
33
|
Fortin-Guichard D, Huberts I, Sanders J, van Elk R, Mann DL, Savelsbergh GJP. Predictors of selection into an elite level youth football academy: A longitudinal study. J Sports Sci 2022; 40:984-999. [PMID: 35212615 DOI: 10.1080/02640414.2022.2044128] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Talent identification in football is complex. Research regarding talent indicators that predict selection into professional academies is increasingly multi-disciplinary, though is typically cross-sectional, failing to consider whether the rate of change of those indicators influences selection. The aim of this study was to determine if longitudinal changes in talent indicators are associated with selection into a professional football academy. A total of 110 Dutch male football players (aged 8-12) playing in a youth development programme of a professional club were included in the study. Players were assessed regularly on their anthropometry, physical fitness, gross motor coordination, technical ability, and psychosocial capacities over four years. A subset of players was then selected into the academy. Cross-sectional and longitudinal analyses revealed the indicators that best predicted selection. The best indicator was the 30 m sprint speed, with prediction not improving when including other predictors or their rate of change. The individuals that the club ultimately selected at age 12 could have been predicted well above chance levels using the sprint speeds at age nine or ten. The relative consistency of the rate of improvement in indicators across participants meant that the rate at which they developed played little role in selections.
Collapse
Affiliation(s)
- Daniel Fortin-Guichard
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Inge Huberts
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Jurrit Sanders
- Sport science & Analytics, PSV Eindhoven, Eindhoven, Netherlands
| | - Ruud van Elk
- Sport science & Analytics, PSV Eindhoven, Eindhoven, Netherlands
| | - David L Mann
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Geert J P Savelsbergh
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Faculty of Sports, Movement and Nutrition, University of Applied Sciences Amsterdam, Amsterdam, Netherlands
| |
Collapse
|
34
|
ZACHARAKIS E, SOUGLIS A, BOURDAS D, GIOLDASIS A, APOSTOLIDIS N, KOSTOPOULOS N. The relationship between physical and technical performance characteristics of young soccer and basketball players: a comparison between two sports. GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE 2022. [DOI: 10.23736/s0393-3660.20.04315-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Irurtia A, Torres-Mestre VM, Cebrián-Ponce Á, Carrasco-Marginet M, Altarriba-Bartés A, Vives-Usón M, Cos F, Castizo-Olier J. Physical Fitness and Performance in Talented & Untalented Young Chinese Soccer Players. Healthcare (Basel) 2022; 10:98. [PMID: 35052262 PMCID: PMC8775658 DOI: 10.3390/healthcare10010098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/29/2021] [Accepted: 12/30/2021] [Indexed: 11/17/2022] Open
Abstract
Sports performance is a complex process that involves many factors, including ethnic and racial differences. China's youth soccer is in a process of constant development, although information about the characteristics of its players and their methodological systems is scarce. The aim of this retrospective study was to characterize the physical fitness and the competitive performance of 722 Chinese players of three sports categories (8.0-9.9, 10.0-11.9 and 12.0-13.9 years), who were classified by their coaches as talented (n = 204) or untalented (n = 518). Players were assessed for anthropometry (body height, body mass, body mass index), lung capacity (Forced Vital Capacity), jumping performance (Squat Jump, Countermovement Jump and Abalakov tests), sprinting performance (10 m and 30 m Sprint tests), agility performance (Repeated Side-Step test) and flexibility (Sit & Reach test). A descriptive, comparative, correlational and multivariate analysis was performed. Competitive ranking was created in order to act as dependent variable in multiple linear regression analysis. Results indicate that Chinese players classified as talented have better motor performance than untalented ones. However, these differences are neither related nor determine the competitive performance of one group or the other.
Collapse
Affiliation(s)
- Alfredo Irurtia
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
- Catalan School of Kinanthropometry, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona (UB), 08038 Barcelona, Spain
| | - Víctor M. Torres-Mestre
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
| | - Álex Cebrián-Ponce
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
- Catalan School of Kinanthropometry, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona (UB), 08038 Barcelona, Spain
| | - Marta Carrasco-Marginet
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
- Catalan School of Kinanthropometry, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona (UB), 08038 Barcelona, Spain
| | - Albert Altarriba-Bartés
- Sport and Physical Activity Studies Center (CEEAF), Sport Performance Analysis Research Group (SPARG), University of Vic-Central University of Catalonia, Vic, 08500 Barcelona, Spain;
| | - Marc Vives-Usón
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
| | - Francesc Cos
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Barcelona, 08038 Barcelona, Spain; (V.M.T.-M.); (Á.C.-P.); (M.C.-M.); (M.V.-U.); (F.C.)
| | - Jorge Castizo-Olier
- School of Health Sciences, TecnoCampus, Pompeu Fabra University, Mataró, 08302 Barcelona, Spain;
| |
Collapse
|
36
|
How does curve sprint evolve across different age categories in soccer players? Biol Sport 2022; 39:53-58. [PMID: 35173363 PMCID: PMC8805361 DOI: 10.5114/biolsport.2022.102867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/25/2020] [Accepted: 01/12/2021] [Indexed: 11/17/2022] Open
Abstract
Research has shown that soccer players regularly execute curved sprints during matches. The purpose of this study was to determine the age-related effects on curve sprint (CS) performance to both sides, asymmetry, and association with linear sprint (LS). Eighty-four soccer players (aged 16.1 ± 1.6 categorized in U15, U17, and U20) were recruited, who performed CS and LS tests. One-way analysis of variance (ANOVA) and effect size (ES) were used to compare CS performance between age categories, and relationships between physical performance measures were calculated using Pearson’s correlation coefficient. The main findings of this study were that: 1) there were significant differences in the “good” side CS among age groups (p < 0.001; ES from moderate to large), but not in the “weak” side CS, 2) curve asymmetry was significantly higher in U20 than U15 (p < 0.05; ES large) and U17 players (p < 0.05; ES moderate), and 3) relationships between CS and LS times decreased with age (from significant and very large [p < 0.001] to non-significant and smallmoderate [p > 0.05]). This study highlights the importance of assessing and training CS in different age categories, an action that becomes less correlated with LS as age increases, with the aim of mitigating the increase in asymmetries as a result of the specialization process, focusing interventions mainly on improving the CS “weak” side.
Collapse
|
37
|
McCalman W, Crowley-McHattan ZJ, Fransen J, Bennett KJM. Skill assessments in youth soccer: A scoping review. J Sports Sci 2021; 40:667-695. [PMID: 34967269 DOI: 10.1080/02640414.2021.2013617] [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] [Indexed: 10/19/2022]
Abstract
Talent identification in youth soccer is a complex decision-making process that requires selectors to judge an individual's future potential. While there has been considerable research into the performance characteristics of talented players, investigators have limited consensus on the best approach to assess soccer skills. Most of the research explains why we should measure skill instead of how we go about assessing skill. Therefore, the current scoping review aimed to synthesize and analyse skill assessments in youth soccer. Four electronic databases (EBSCO, ProQuest, PubMed, and Scopus) were searched for relevant studies. Information regarding the sample characteristics and methodological design of the skill assessments were extracted, synthesised, and presented in a qualitative analysis. Overall, 226 skill assessments were used across the 93 included studies. Male players from different ages (U/7-U/23) and playing levels comprised most (89%) of the collective sample. The majority of assessments were performed in settings not representative of football match-play (68%), focused on offensive skills (99%), and included skill outcome measures (95%). The variability of assessments highlights some confusion about the best way to assess soccer skill, potentially limiting selectors ability to identify skilful players. Ultimately, this will impact the number of quality players within the talent pool.
Collapse
Affiliation(s)
- William McCalman
- Faculty of Health, Discipline of Sport and Exercise Science, Southern Cross University, Coffs Harbour, Australia
| | - Zachary J Crowley-McHattan
- Faculty of Health, Discipline of Sport and Exercise Science, Southern Cross University, Coffs Harbour, Australia
| | - Job Fransen
- Human Performance Research Centre, School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney, Sydney, Australia
| | - K J M Bennett
- Faculty of Health, Discipline of Sport and Exercise Science, Southern Cross University, Coffs Harbour, Australia
| |
Collapse
|
38
|
Characteristics of select and non-select U15 male soccer players. Biol Sport 2021; 38:535-544. [PMID: 34937962 PMCID: PMC8670819 DOI: 10.5114/biolsport.2021.101126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 09/27/2020] [Accepted: 11/18/2020] [Indexed: 11/26/2022] Open
Abstract
Baseline characteristics of 31 healthy male U15 soccer players who were classified as select or non-select at the end of the season were compared. Players were 14.4 ± 0.54 years (13.6–15.3 years) at baseline; characteristics included body size, proportions and composition, estimated maturity status, several functional capacities, and coach classifications of potential in the sport. Decisions regarding selection or non-selection were made about two months after baseline. Select and non-select U15 soccer players differed significantly in estimated maturity status, body size, proportions and estimated muscle mass, functional tests related to speed, power and strength, and coach evaluation of potential, specifically tactical skills on offense and skills associated with creativity and decision making. When age and biological maturity status were statistically controlled, select and non-select players differed significantly only on the vertical jump, grip strength, and coach ratings of tactical skills on offense and of creativity and decision making. Results of stepwise discriminant analysis highlighted the importance of coach evaluation of tactical skills associated with offense, and of power and strength in distinguishing select from non-select players. The results highlight the advantages of advanced biological maturity status among adolescent male soccer players and also the importance of coach perceptions of talent. The latter implies a need for further study of the basis of coach perceptions, specifically how they are influenced by and perhaps interact with player characteristics at different ages, and how the perceptions influence playing time and player behaviors and interactions.
Collapse
|
39
|
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
| |
Collapse
|
40
|
Effects of Intensity Modulated Total-Body Circuit Training Combined with Soccer Training on Physical Fitness in Prepubertal Boys after a 6-Month Intervention. J Hum Kinet 2021; 80:207-222. [PMID: 34868430 PMCID: PMC8607770 DOI: 10.2478/hukin-2021-0102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The purpose of this study was to examine the effects of a 6-month high- or moderate-intensity total-body circuit training (CT) program on physical fitness in prepubertal soccer players. Sixty-seven prepubertal boys with a mean age of 11.2 ± 0.7 years completed the study. Participants from a soccer academy were randomly assigned either to a high-intensity CT group (HCT, n = 22) or a moderate-intensity CT group (MCT, n = 24). A control group (CON, n = 21) comprised age-matched individuals who were not involved in any regular training regime. CT protocols were included in the experimental group’s training sessions 3 times per week over 24 weeks as part of their usual weekly training regime. Based on the HR zone method, CT protocols included high- or moderate-intensity (85–95% HRmax or 75–85% HRmax) series of 3 different sets of upper- and lower-body strength exercises with articular and muscular mobilization, all culminated with 40-m sprints. Physical fitness was evaluated by the Eurofit test which included the flamingo balance (FLB), plate tapping (PLT), sit-and-reach (SAR), standing broad jump (SBJ), handgrip (HG), sit-ups (SUP), bent arm hang (BAH), 10×5 m shuttle run (SHR), and the Physical Working Capacity test (PWC170). The two-way ANOVA indicated group×time interaction effects for 5 components: the largest was for the SBJ (F2,63 = 42.895, p < 0.001, η2 = 0.577), and the lowest for the SHR (F2,63 = 5.006, p < 0.01, η2 = 0.137) indicating better improvements in the HCT compared to the MCT group. Furthermore, for HCT and MCT groups the highest pre- to post-intervention percentage changes were for the FLB and the SAR, while in the CON group the changes of all physical fitness components were not significant (p < 0.05). In conclusion, the intensity-controlled total-body CT protocol incorporated into a standard soccer training program is effective for enhancement in physical fitness performance in prepubertal soccer players.
Collapse
|
41
|
Keiner M, Kapsecker A, Stefer T, Kadlubowski B, Wirth K. Differences in Squat Jump, Linear Sprint, and Change-of-Direction Performance among Youth Soccer Players According to Competitive Level. Sports (Basel) 2021; 9:sports9110149. [PMID: 34822349 PMCID: PMC8624564 DOI: 10.3390/sports9110149] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/24/2021] [Accepted: 10/25/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of this investigation was to analyze significant differences in performance depending on the level of play (elite vs. amateur) in youth soccer players (under 17 years. old (U17) and U19). A cross-sectional study was conducted, and 45 elite and amateur male youth soccer players (16.56 ± 0.9 years old) were evaluated in their performances in squat jump (SJ), 10 m linear sprint (LS), 20 m LS, 505 agility test (505) and Illinois agility test (IAT). Differences in performances were analyzed with a 2 × 2 MANOVA, post-hoc ANOVAs, and Hedges’ g (g) for pairwise comparisons of subgroups (level of play and age group). This investigation showed that the elite player performance was significantly (p < 0.05) better in all performance tests than amateur players in both age groups. Interestingly, this investigation showed that the more complex the target exercise, the larger the effect sizes for group differences (SJ: g = 0.64–1.18, LS: g = 0.05–2.23, change-of-direction (COD): g = 3.01–6.84). The SJ, LS, 505, and IAT may prove useful in talent selection test batteries to separate between competitive levels in youth soccer players.
Collapse
Affiliation(s)
- Michael Keiner
- Department of Sports Science, German University of Health & Sport, 85737 Ismaning, Germany; (A.K.); (T.S.); (B.K.)
- Correspondence:
| | - Andreas Kapsecker
- Department of Sports Science, German University of Health & Sport, 85737 Ismaning, Germany; (A.K.); (T.S.); (B.K.)
| | - Tobias Stefer
- Department of Sports Science, German University of Health & Sport, 85737 Ismaning, Germany; (A.K.); (T.S.); (B.K.)
| | - Björn Kadlubowski
- Department of Sports Science, German University of Health & Sport, 85737 Ismaning, Germany; (A.K.); (T.S.); (B.K.)
- DSC Arminia Bielefeld e. V., 33615 Bielefeld, Germany
| | - Klaus Wirth
- Department of Sports Science, University of Applied Sciences Wiener Neustadt, 2700 Vienna, Austria;
| |
Collapse
|
42
|
Carpels T, Scobie N, Macfarlane NG, Kemi OJ. Youth-to-Senior Transition in Elite European Club Soccer. INTERNATIONAL JOURNAL OF EXERCISE SCIENCE 2021; 14:1192-1203. [PMID: 35096247 PMCID: PMC8758176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The priority for soccer academies is to develop youth players that graduate and transfer directly to their senior squads. The aim of this study was to assess the effectiveness of this direct youth-to-senior pathway by examining the extent to which club-trained players (CTPs) are currently involved in elite male European soccer. Relevant demographic longitudinal studies between 2009 and 2020 conducted by the International Centre for Sports Studies Football Observatory were analysed. The main findings were that the proportion of CTPs in senior squads has decreased from 23% to 17% over this time period, while the proportion of expatriates (EXPs) has increased from 35% to 42%. Moreover, clubs resorted more frequently to making new signings (NS, i.e. association-trained players (ATPs) and/or EXPs), with squad proportion increasing from 37% to 44%, while only launching one debutant (DBT, i.e. CTP with no previous senior experience) on average per season. Similar trends are observed in the evolution of playing time: while the fielding of CTPs remained constant (15%), EXPs and NS are fielded increasingly more (49% and 36%, respectively), despite a positive relationship between CTP match fielding and league ranking, with a Spearman Rank correlation r = 0.712 (95% confidence interval [0.381-0.881]), p < 0.01. In conclusion, young talents are still provided opportunities; however, these are limited and increasingly less frequent at their parent clubs. This potentially suggests a dysfunctional direct youth-to-senior development pathway.
Collapse
Affiliation(s)
- Thomas Carpels
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
- Rangers Football Club, Glasgow, SL, GBR
- Royal Antwerp Football Club, Antwerp, BELGIUM
| | - Nairn Scobie
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Niall G Macfarlane
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Ole J Kemi
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| |
Collapse
|
43
|
Mainer-Pardos E, Gonzalo-Skok O, Nobari H, Lozano D, Pérez-Gómez J. Age-related differences in linear sprint in adolescent female soccer players. BMC Sports Sci Med Rehabil 2021; 13:97. [PMID: 34420519 PMCID: PMC8381494 DOI: 10.1186/s13102-021-00327-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/12/2021] [Indexed: 11/12/2022]
Abstract
Background Several studies have observed the contribution of chronological age, biological maturation, and anthropometric characteristics to sprinting performance in young soccer players. Nevertheless, there are no studies that have analysed the contribution of these characteristics to running speed qualities in adolescent female soccer players. Objective This study investigated age-related differences in sprint performance in adolescent female soccer players. Also, it examined the possible influence of anthropometry [body mass and body mass index (BMI)] and biological maturation [age at peak height velocity (APHV)] in sprint performance. Methods Eighty adolescent female soccer players [under (U) 14, n = 20; U16, n = 37; U18, n = 23] participated in this study. Players were tested for 40 m sprint (each 10 m split times). Results Posthoc analysis revealed better performance in all split sprint times of older soccer players (U18 and U16) compared with younger category (F: 3.380 to 6.169; p < 0.05; ES: 0.64 to 1.33). On the contrary in all split sprint times, there were no significant changes between U16 and U18 (p < 0.05; ES: 0.03 to 0.17). ANCOVA revealed differences in all parameters between groups, controlled for APHV (p < 0.05). In contrast, all between-group differences disappeared after body mass and BMI adjustment (p > 0.05). Finally, the results indicate that BMI and body mass were significantly correlated with 40 m sprint (p < 0.05; r: -0.31) and 20 m flying (p < 0.01; r: 0.38), respectively. Conclusion In the present players’ sample, body mass and BMI had a significant impact on running speed qualities.
Collapse
Affiliation(s)
- Elena Mainer-Pardos
- Health Sciences Faculty, Universidad San Jorge, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | | | - Hadi Nobari
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, 81746-7344, Isfahan, Iran. .,Sports Scientist, Sepahan Football Club, 81887-78473, Isfahan, Iran.
| | - Demetrio Lozano
- Health Sciences Faculty, Universidad San Jorge, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Jorge Pérez-Gómez
- HEME Research Group, Faculty of Sport Sciences, University of Extremadura, 10003, Cáceres, Spain
| |
Collapse
|
44
|
Joseph J, McIntyre F, Joyce C, Scanlan A, Cripps A. A comparison of multidimensional qualities discriminant of selection in elite adolescent Australian basketball athletes. PLoS One 2021; 16:e0256032. [PMID: 34388186 PMCID: PMC8362962 DOI: 10.1371/journal.pone.0256032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 07/28/2021] [Indexed: 11/18/2022] Open
Abstract
Purpose The aims of this study were to (1) quantify the multidimensional attributes of male and female basketball athletes under 16 years of age (U16) and under 18 years of age (U18), and (2) identify attributes that distinguish selection into a talent pathway according to sex and age group. Methods 67 male and 71 female athletes competing in U16 and U18 selection trials for a state based Australian basketball talent pathway completed a multidimensional testing battery. The test battery consisted of anthropometric, physical (20- linear sprint, countermovement jump height, Yo-Yo Intermittent Recovery Test Level 2), technical (Basketball Jump Shooting Accuracy Test), tactical (video decision making), and psychological (Sports Orientation Questionnaire, Psychological Performance Inventory-Alternative) assessments. Mean differences and independent t-tests were used to assess comparative differences between selected and non-selected athletes within each age and sex cohort. Stepwise discriminant analyses were used to identify attributes that were the strongest discriminators of selection in each group (male U16, male U18, female U16, and female U18). Results The discrimminant models showed for male U16 athletes smaller height (ES = -0.18) and greater shooting accuracy (ES = 0.52) was most discriminant of selection. Results were largely homogenous for male U18 athletes with lower visualisation score (ES = -0.62) most discriminant of selection. In female cohorts, faster 20-m sprint time (ES = -0.66) and taller height (ES = 0.58) was most discriminant of selection in U16 athletes while greater shooting accuracy (ES = 0.67), countermovement jump height (ES = 1.04), and height (ES = 0.65) was most discriminant of selection in U18 athletes. Conclusions These results emphasise the differing selection priorities within adolescent basketball cohorts according to sex and age group. The testing of anthropometric, physical and technical attributes may hold particular utility in adolescent female basketball given their identified importance to selection across U16 and U18 cohorts.
Collapse
Affiliation(s)
- Jacob Joseph
- School of Health Sciences, University of Notre Dame Australia, Fremantle, West Australia, Australia
- * E-mail:
| | - Fleur McIntyre
- School of Health Sciences, University of Notre Dame Australia, Fremantle, West Australia, Australia
| | - Christopher Joyce
- School of Health Sciences, University of Notre Dame Australia, Fremantle, West Australia, Australia
| | - Aaron Scanlan
- Human Exercise and Training Laboratory, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, Queensland, Australia
| | - Ashley Cripps
- School of Health Sciences, University of Notre Dame Australia, Fremantle, West Australia, Australia
| |
Collapse
|
45
|
Ramos GP, Nakamura FY, Penna EM, Mendes TT, Mahseredjian F, Lima AM, Garcia ES, Prado LS, Coimbra CC. Comparison of Physical Fitness and Anthropometrical Profiles Among Brazilian Female Soccer National Teams From U15 to Senior Categories. J Strength Cond Res 2021; 35:2302-2308. [PMID: 31009426 DOI: 10.1519/jsc.0000000000003140] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Ramos, GP, Nakamura, FY, Penna, EM, Mendes, TT, Mahseredjian, F, Lima, AM, Garcia, ES, Prado, LS, and Coimbra, CC. Comparison of physical fitness and anthropometrical profiles among Brazilian female soccer national teams from U15 to senior categories. J Strength Cond Res 35(8): 2302-2308, 2021-This study aimed to compare anthropometric and physical fitness of Brazilian female national team soccer players from the U15 to senior categories, and to compare the physical performance between selected and nonselected players. Subjects included 231 athletes (U15, n = 46, U17, n = 49, U20, n = 98, and Senior, n = 38). Body mass, height, sum of skinfolds, squat jump (SJ), countermovement jump (CMJ), 20-m linear sprint, and Yo-Yo IR1 were assessed. The U15 players were shorter than all other groups (p < 0.01) and lighter than U20 players (p < 0.01). Regarding physical tests, Senior athletes presented higher SJ compared with U20, and both showed higher CMJ and SJ compared with the U15 and U17 (p < 0.05). Senior athletes were also faster than players of all other categories in 20-m sprint (p < 0.01) and covered the greatest distance in the Yo-Yo IR1 (p < 0.05). U20 were better in the Yo-Yo IR1 than the younger groups (p < 0.05). When comparing selected and nonselected players, no differences were identified in anthropometric measures (p > 0.05). However, selected players from U17, U20, and Senior teams showed better performance in Yo-Yo IR1 than nonselected ones (p < 0.05). Finally, selected senior athletes also presented higher CMJ and SJ than nonselected players (p < 0.05). These results suggest that, although there is a tendency for maintenance in anthropometric measures from the age of 15 years, there are substantial improvements in speed, lower-body power, and aerobic capacity from U20 age group. In addition, it seems that intermittent aerobic fitness contributes to the selection of players to international tournaments in national teams.
Collapse
Affiliation(s)
- Guilherme P Ramos
- Federal University of Minas Gerais, School of Physical Education, Physiotherapy and Occupational Therapy, Belo Horizonte, Minas Gerais, Brazil
- Brazilian National Football Confederation, Rio de Janeiro, Brazil
| | - Fabio Y Nakamura
- The College of Healthcare Sciences, James Cook University, Queensland, Australia
- Department of Medicine and Aging Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Eduardo M Penna
- Federal University of Minas Gerais, School of Physical Education, Physiotherapy and Occupational Therapy, Belo Horizonte, Minas Gerais, Brazil
- Federal University of Para, Castanhal, Pará, Brazil
| | - Thiago T Mendes
- Federal University of Maranhão, São Luiz, Maranhão, Brazil ; and
| | | | - Andre M Lima
- Federal University of Minas Gerais, School of Physical Education, Physiotherapy and Occupational Therapy, Belo Horizonte, Minas Gerais, Brazil
| | - Emerson S Garcia
- Department of Medicine and Aging Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Luciano S Prado
- Federal University of Minas Gerais, School of Physical Education, Physiotherapy and Occupational Therapy, Belo Horizonte, Minas Gerais, Brazil
| | - Cândido C Coimbra
- Federal University of Minas Gerais, School of Physical Education, Physiotherapy and Occupational Therapy, Belo Horizonte, Minas Gerais, Brazil
- Federal University of Minas Gerais, Institute of Biological Sciences, Belo Horizonte, Minas Gerais, Brazil
| |
Collapse
|
46
|
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: 47] [Impact Index Per Article: 15.7] [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.
Collapse
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
| |
Collapse
|
47
|
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
| |
Collapse
|
48
|
Dugdale JH, Sanders D, Myers T, Williams AM, Hunter AM. Progression from youth to professional soccer: A longitudinal study of successful and unsuccessful academy graduates. Scand J Med Sci Sports 2021; 31 Suppl 1:73-84. [PMID: 33871087 DOI: 10.1111/sms.13701] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/03/2020] [Accepted: 04/23/2020] [Indexed: 11/30/2022]
Abstract
To optimize use of available resources, professional academies develop strategies to assess, monitor, and evaluate players as they progress through adolescence toward adulthood. However, few published reports exist using longitudinal study designs to examine performance throughout adolescence and the transition from youth to professional soccer. We examined differences in the age of player recruitment alongside longitudinal performance differences on field-based fitness tests of successful vs. unsuccessful graduates across the entire age spectrum recruited by a professional soccer academy. Altogether, 537 youth soccer players volunteered to participate. We recorded the age of recruitment, biannual fitness test performance, and subsequent success in attaining a senior professional contract at the club across a period of 12 years. Only 53 (10%) of players were successful in obtaining a professional contract, with 68% of players who became professional being recruited at 12 years of age or older. Individuals recruited at an earlier age did not display a higher probability of success in attaining a professional contract. Bayesian regression models reported a consistent interaction between age and group for data on all performance measures. Moreover, "successful" academy graduates only physically outperformed their "unsuccessful" counterparts from age ~13-14 years onward, with either no differences in performance, or performance on physical fitness tests favoring "unsuccessful" players prior to this age. Findings suggest that high achievers during childhood and early adolescence may not develop into successful senior professionals, raising concerns about the predictive utility of talent identification models.
Collapse
Affiliation(s)
- James H Dugdale
- Physiology Exercise and Nutrition Research Group, Faculty of Health Sciences and Sport, University of Stirling, Stirling, UK
| | - Dajo Sanders
- Department of Human Movement Science, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Tony Myers
- Sport, Physical Activity and Health Research Centre, Newman University, Birmingham, UK
| | - A Mark Williams
- Department of Health, Kinesiology, and Recreation, University of Utah, Salt Lake City, UT, USA
| | - Angus M Hunter
- Physiology Exercise and Nutrition Research Group, Faculty of Health Sciences and Sport, University of Stirling, Stirling, UK
| |
Collapse
|
49
|
Wilson RS, Hunter AH, Camata TV, Foster CSP, Sparkes GR, Moura FA, Santiago PRP, Smith NMA. Simple and reliable protocol for identifying talented junior players in team sports using small-sided games. Scand J Med Sci Sports 2021; 31:1647-1656. [PMID: 33844358 DOI: 10.1111/sms.13969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/18/2021] [Accepted: 03/26/2021] [Indexed: 12/01/2022]
Abstract
We designed and tested a protocol for measuring the performance of individuals in small-sided soccer games. We tested our protocol on three different groups of youth players from elite Brazilian football academies. Players in each group played a series of 3v3 games, in which individuals were randomly assigned into new teams and against new opponents for each game. We calculated each individual's average individual goals scored, goals scored by teammates, goals conceded, and net team goals per game. Our protocol was consistent across days and repeatable across groups, with intraclass correlation coefficients (ICCs) of 0.57-0.69 for average net goals per game across testing days. Players could achieve high success by scoring goals or ensuring their team concede few goals. We also calculated the first and second dimension of a principal component analysis based on each player's number of goals scored, goals scored by teammates, and number of goals conceded per game. Players that were overall high performers had higher PC1 scores, while PC2 scores represented the type of contribution made by a player to overall performance. Positive PC2 values were indicative of high number of individual goals while negative values were associated with more goals from teammates and fewer conceded goals. Our design allows coaches and scouts to easily collect a robust metric of individual performance using randomly designed, small-sided games. We also provide simulations that allow one to apply our methodology for individual talent identification to other small-sided games in any team sport.
Collapse
Affiliation(s)
- Robbie S Wilson
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Andrew H Hunter
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Thiago V Camata
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Charles S P Foster
- School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Gabriella R Sparkes
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Felipe A Moura
- Sport Sciences Department, State University of Londrina, Londrina, Brazil
| | - Paulo R P Santiago
- School of Physical Education and Sports of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Nicholas M A Smith
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| |
Collapse
|
50
|
Koopmann T, Faber I, Baker J, Schorer J. Assessing Technical Skills in Talented Youth Athletes: A Systematic Review. Sports Med 2021; 50:1593-1611. [PMID: 32495253 PMCID: PMC7441090 DOI: 10.1007/s40279-020-01299-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Talent identification and development (TID) programs aim to identify players with the greatest potential for long-term success. Previous research suggests that the assessment of sport-specific technical skills is valuable for discriminating between more and less skilled individuals and/or for predicting future performance. Objective This review aims to provide an overview on both the instruments used to assess sport-specific technical skills and their discriminatory, explanatory and/or predictive findings in the context of TID. Methods Electronic searches were conducted in PubMed, Web of Knowledge, SPORTDiscus, SURF and Scopus (January 1990–October 2019). Search terms covered the areas of sport, technical skills assessment, performance, skill level and youth. In the end, 59 relevant studies were identified and evaluated. Results The results highlight the widespread and important role of technical skills in TID; almost all studies (93%) reported discriminatory, explanatory and/or predictive benefits for the assessment of sport-specific technical skills. Analyzing and categorizing the number of assessment methods applied in the studies (n = 69) according to their method type (‘technique-related’ or ‘outcome-related’ variables) and method set-up (‘experimental’ or ‘competition’ data acquisition environment) indicated a clear tendency towards ‘outcome-related’ (73%) and ‘experimental’ (75%) assessment methods. We also found a strong overrepresentation of studies assessing cross-sectional data (75%) in soccer (53%) in male samples (74% of studies reporting subjects’ sex) from European countries (64%). Conclusions On the one hand, our findings demonstrate the great capability of sport-specific technical skills assessments to discriminate different performance levels and predict future performance in TID activities. On the other hand, this review highlights the focus on ‘outcome-related’ and ‘experimental’ methods in specific populations and, consequently, the limited knowledge in other areas. Here, the application of ‘technique-related’ and ‘competition’ methods appears promising for adding new knowledge, especially in the light of technological advances.
Collapse
Affiliation(s)
- Till Koopmann
- Institute of Sport Science, Carl von Ossietzky University Oldenburg, Ammerländer Heerstraße 114-118, 26111, Oldenburg, Germany.
| | - Irene Faber
- Institute of Sport Science, Carl von Ossietzky University Oldenburg, Ammerländer Heerstraße 114-118, 26111, Oldenburg, Germany.,International Table Tennis Federation, Lausanne, Switzerland
| | - Joseph Baker
- School of Kinesiology and Health Science, York University, Toronto, Canada
| | - Jörg Schorer
- Institute of Sport Science, Carl von Ossietzky University Oldenburg, Ammerländer Heerstraße 114-118, 26111, Oldenburg, Germany
| |
Collapse
|