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García-Angulo FJ, Palao JM, Giménez-Egido JM, Ortega-Toro E. Effect of Rule Modifications on Kinematic Parameters Using Maturity Stage as a Moderating Variable in U-10 Football Players. SENSORS (BASEL, SWITZERLAND) 2024; 24:2462. [PMID: 38676078 PMCID: PMC11053628 DOI: 10.3390/s24082462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024]
Abstract
The aim of the present study was to analyse the effects of regulatory modifications in competitive situations on cinematic variables, considering maturity stage as a moderating factor, in youth football players. A quasi-experimental study was conducted in which 45 players with a mean age of 9.47 ± 0.54 participated. The independent variable analysed was the modification of rules (playing time, scoring, and specific rules). The dependent variables analysed were cinematic variables. These variables were recorded with WimuTM. The maturity stage was considered a moderating factor in this effect. The main results indicate that the modified competition reduced the total distance covered, maximum acceleration speed, and distance covered in acceleration and deceleration in different speed zones. In addition, the maturity stage was found to moderate the effect of the intervention on the total distance covered, distance covered by accelerating in zone 3, and distance covered by decelerating in zone 3. Thus, the proposed modification appeared to reduce the physical demand for competition. Furthermore, it reduced the differences between players with early maturational development and those with late maturational development.
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Affiliation(s)
- Francisco Javier García-Angulo
- Department of Physical Activity and Sport, Faculty of Sport Science, University of Murcia, 30720 Murcia, Spain; (F.J.G.-A.); (J.M.G.-E.)
- Sport Performance Analysis Association, 30720 Murcia, Spain;
| | - José Manuel Palao
- Sport Performance Analysis Association, 30720 Murcia, Spain;
- Department of Health, Exercise and Sport Management, University of Wisconsin-Parkside, Kenosha, WI 53144, USA
| | - José María Giménez-Egido
- Department of Physical Activity and Sport, Faculty of Sport Science, University of Murcia, 30720 Murcia, Spain; (F.J.G.-A.); (J.M.G.-E.)
- Sport Performance Analysis Association, 30720 Murcia, Spain;
| | - Enrique Ortega-Toro
- Department of Physical Activity and Sport, Faculty of Sport Science, University of Murcia, 30720 Murcia, Spain; (F.J.G.-A.); (J.M.G.-E.)
- Sport Performance Analysis Association, 30720 Murcia, Spain;
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Wik EH, Chamari K, Tabben M, Di Salvo V, Gregson W, Bahr R. Exploring Growth, Maturity, and Age as Injury Risk Factors in High-Level Youth Football. Sports Med Int Open 2024; 8:a21804594. [PMID: 38312925 PMCID: PMC10832576 DOI: 10.1055/a-2180-4594] [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: 03/08/2023] [Accepted: 09/18/2023] [Indexed: 02/06/2024] Open
Abstract
Rapid somatic growth and biological maturity status may affect injury patterns in youth football, yet firm conclusions cannot be drawn from the existing research. We aimed to explore growth velocity, maturity, and age as injury risk factors in 95 academy players (11.9-15.0 years), using anthropometric (height and body mass), maturity (skeletal age), injury, and football exposure data collected prospectively over three seasons (2016/17-2018/19). We compared the relative quality of mixed-effects logistic regression models with growth velocity for 223 growth intervals (average 113 days) included as fixed effects and adjusted for age (chronological or skeletal) plus load (hours/week). Associations were considered practically relevant based on the confidence interval for odds ratios, using thresholds of 0.90 and 1.11 to define small beneficial and harmful effects, respectively. We observed harmful effects of older age on overall (OR: 2.61, 95% CI: 1.15-5.91) and sudden onset (1.98, 1.17-3.37) injury risk. Significant associations (p<0.05) were observed for higher body mass change and greater maturity on sudden onset injuries, and for higher hours/week on gradual onset, bone tissue, and physis injuries. Future studies should include larger samples, monitoring athletes from pre-adolescence through maturation, to enable within-subject analyses and better understand the relationship between growth, maturation, and injuries.
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Affiliation(s)
- Eirik Halvorsen Wik
- FIFA Medical Centre of Excellence, Aspetar Orthopaedic and Sports
Medicine Hospital, Doha, Qatar
- Oslo Sports Trauma Research Center, Department of Sports Medicine,
Norwegian School of Sport Sciences, Oslo, Norway
- Institute of Sport and Exercise Medicine, Department of Exercise, Sport
and Lifestyle Medicine, Faculty of Medicine and Health Sciences, Stellenbosch
University, Stellenbosch, South Africa
- Division of Physiotherapy, Department of Health and Rehabilitation
Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University,
Stellenbosch, South Africa
| | - Karim Chamari
- FIFA Medical Centre of Excellence, Aspetar Orthopaedic and Sports
Medicine Hospital, Doha, Qatar
| | - Montassar Tabben
- FIFA Medical Centre of Excellence, Aspetar Orthopaedic and Sports
Medicine Hospital, Doha, Qatar
| | - Valter Di Salvo
- Football Performance and Science Department, Aspire Academy, Doha,
Qatar
- Department of Movement, Human and Health Sciences, University of Rome
'Foro Italico', Roma, Italy
| | - Warren Gregson
- Football Performance and Science Department, Aspire Academy, Doha,
Qatar
- Department of Sport and Exercise Sciences, Institute of Sport,
Manchester Metropolitan University, Manchester, United Kingdom of Great Britain
and Northern Ireland
| | - Roald Bahr
- FIFA Medical Centre of Excellence, Aspetar Orthopaedic and Sports
Medicine Hospital, Doha, Qatar
- Oslo Sports Trauma Research Center, Department of Sports Medicine,
Norwegian School of Sport Sciences, Oslo, Norway
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Andersen TR, Drevsfeldt A, Möller S, Møller M. Injuries in male youth football: a one season prospective cohort study of 223 Danish elite players. Front Sports Act Living 2023; 5:1250223. [PMID: 38164442 PMCID: PMC10757927 DOI: 10.3389/fspor.2023.1250223] [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: 06/29/2023] [Accepted: 11/22/2023] [Indexed: 01/03/2024] Open
Abstract
Objectives This study prospectively investigated injury prevalence, incidence, and burden in male elite under-17 football players (N = 223) during a full season. Methods The players weekly completed a standardized web-based injury survey (OSTRC-H2) and a physical exposure report throughout the study. Results Average weekly response rate was 89.5%. Football exposure accounted for 52.4% of total physical exposure. On average (±SD), the players participated in individual football, strength, and rehabilitation practices for 1.2 ± 1.5, 3.0 ± .2.1, and 1.9 ± 3.4 h/week, respectively. In total, 742 health problems were reported. Mean weekly prevalence of health problems, injuries and illnesses were 20.1%, 16.5% and 3.8%, respectively. The injury incidence per 1,000 h of football exposure, match play and team practice were 8.28 (95% CI: 7.54-9.08), 16.77 (95% CI: 13.65-20.4), and 7.24 (95% CI: 6.5-8.04), respectively. Sudden-onset and gradual-onset injuries accounted for 36.7% and 43.4% of the total proportion of health problems. Hip/groin injuries had the highest incidence (1.58/1,000 h), whereas knee injuries had the highest burden (20.86 days lost/1,000 h). On average, the players experienced 3.33 health problems (average duration: 7.8 days). On average pr. player, 2.7 (95% CI: 2.2-3.3) wks of football exposure were lost. Conclusion Sudden and gradual-onset injuries influenced player availability during the season. Health problem prevalence fluctuated markedly, and injury incidence was higher during match play than training. The players had substantial volumes of training beyond football-specific training and matches. Our findings could assist medical and sports science practitioneers in enhancing training and recovery processes to maximize player availability.
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Affiliation(s)
- Thomas Rostgaard Andersen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Danish Football Association, Brondby, Denmark
| | - Andreas Drevsfeldt
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Sören Möller
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Open Patient Data Explorative Network, Odense University Hospital, Odense, Denmark
| | - Merete Møller
- Research Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
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Weishorn J, Jaber A, Trefzer R, Zietzschmann S, Kern R, Spielmann J, Renkawitz T, Bangert Y. How Does Age Affect Injury Characteristics in Young Elite Footballers?-A Prospective Cohort Study of a German Youth Academy. J Clin Med 2023; 12:6938. [PMID: 37959403 PMCID: PMC10649570 DOI: 10.3390/jcm12216938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 10/26/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Little is known about age-related changes in injury characteristics and burden, and existing data are inconsistent, highlighting the need for new studies on this topic. This study aimed to describe age-related injury risk, severity and burden in a German elite youth football academy. METHODS A prospective cohort study was conducted in the 2012/2013 season, reporting 109 time-loss injuries among 138 young athletes playing at an elite football academy in Germany. For the most severe injuries, the injury burden in the different age groups was considered separately. RESULTS Athletes missed a total of 2536 days of exposure, resulting in an overall incidence of 2.6 per 1000 h (1.7-3.0; 95% CI) and a burden of 60.6 days lost per 1000 h (40.8-80.3; 95% CI). The incidence and burden of joint sprains and muscle injuries were higher in the older age groups. Physeal injuries peaked in the U14 age group during the pubertal growth spurt. Bone injuries and contusions showed no age trend. CONCLUSION Injury characteristics vary with age. The overall incidence, severity and burden of injuries increased with the age of the athletes. To ensure the optimal development of young athletes, it is important to be aware of the differences in injury susceptibility between age groups in order to implement tailored prevention programmes.
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Affiliation(s)
- Johannes Weishorn
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - Ayham Jaber
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - Raphael Trefzer
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - Severin Zietzschmann
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - Ralph Kern
- Ethianum Heidelberg, Fehrentzstrasse 2, 69115 Heidelberg, Germany
- TSG 1899 Hoffenheim Fußball-Spielbetriebs GmbH, Horrenberger Straße 58, 74939 Zuzenhausen, Germany
| | - Jan Spielmann
- TSG ResearchLab gGmbH, Horrenberger Straße 58, 74939 Zuzenhausen, Germany
| | - Tobias Renkawitz
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - Yannic Bangert
- Department of Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
- TSG 1899 Hoffenheim Fußball-Spielbetriebs GmbH, Horrenberger Straße 58, 74939 Zuzenhausen, Germany
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Takei S, Torii S, Taketomi S, Iizuka S, Tojima M, Iwanuma S, Iida Y, Tanaka S. Developmental stage and lower quadriceps flexibilities and decreased gastrocnemius flexibilities are predictive risk factors for developing Osgood-Schlatter disease in adolescent male soccer players. Knee Surg Sports Traumatol Arthrosc 2023:10.1007/s00167-023-07378-z. [PMID: 37002485 DOI: 10.1007/s00167-023-07378-z] [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: 06/24/2022] [Accepted: 03/01/2023] [Indexed: 06/19/2023]
Abstract
PURPOSE This study aimed to elucidate the influential predictive risk factors of Osgood-Schlatter disease (OSD) on the support (non-kicking) leg among adolescent soccer players considering peak height velocity (PHV) age and investigate the cut-off values of the predictive variables. METHODS A cohort of 302 Japanese adolescent male soccer players aged 12-13 years were followed over 6 months. All players underwent physical examination, tibial tubercle ultrasonography, anthropometric and whole-body composition measurements, and muscle flexibility test of the support leg at the baseline. The developmental stage was evaluated from the PHV age. The OSD of the support leg was diagnosed 6 months later; players were divided into the OSD and control (CON) groups. The predictive risk factors were analyzed by multivariate logistic regression analysis. RESULTS There were 42 players who had developed OSD at baseline and they were excluded from the study. Among the 209 players, 43 and 166 belonged to the OSD and CON groups, respectively. The predictive risk factors of OSD development were PHV age ± 6 months at baseline (p = 0.046), apophyseal stage of tibial tuberosity maturity at baseline (p < 0.001), quadriceps flexibility ≥ 35° at baseline (p = 0.017), and decrease in gastrocnemius flexibility in 6 months (p = 0.009). CONCLUSION PHV age ± 6 months at baseline, apophyseal stage of the tibial tuberosity at baseline, quadriceps flexibility ≥ 35° at baseline, and decrease in gastrocnemius flexibility in 6 months are predictive risk factors of OSD development in the support leg among adolescent male soccer players. It is crucial to know the PHV age of each player, and not only the flexibility of quadriceps muscle but also the gastrocnemius should be monitored to predict OSD. LEVEL OF EVIDENCE II.
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Affiliation(s)
- Seira Takei
- Department of Orthopaedic Surgery, Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Waseda Institute of Human Growth and Development, Saitama, Japan
| | - Suguru Torii
- Waseda Institute of Human Growth and Development, Saitama, Japan.
- Faculty of Sport Sciences, Waseda University, Saitama, Japan.
| | - Shuji Taketomi
- Department of Orthopaedic Surgery, Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | | | - Michio Tojima
- School of Health Sciences, Tokyo International University, Saitama, Japan
| | - Soichiro Iwanuma
- Department of School Education, Teikyo University of Science, Tokyo, Japan
| | - Yukako Iida
- Waseda Institute of Human Growth and Development, Saitama, Japan
- Faculty of Sport Science, Surugadai University, Saitama, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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