scholarly journals Premier League academy soccer players’ experiences of competing in a tournament bio-banded for biological maturation

2017 ◽  
Vol 36 (7) ◽  
pp. 757-765 ◽  
Author(s):  
Sean P. Cumming ◽  
Daniel J. Brown ◽  
Siobhan Mitchell ◽  
James Bunce ◽  
Dan Hunt ◽  
...  
Keyword(s):  
Soccer Players ◽  
Premier League ◽  
Biological Maturation

scholarly journals Comparison of Official and Friendly Matches through Acceleration, Deceleration and Metabolic Power Measures: A Full-Season Study in Professional Soccer Players

2021 ◽  
Vol 18 (11) ◽  
pp. 5980
Author(s):  
Hadi Nobari ◽  
Sara Mahmoudzadeh Khalili ◽  
Rafael Oliveira ◽  
Alfonso Castillo-Rodríguez ◽  
Jorge Pérez-Gómez ◽  
...  
Keyword(s):  
Effect Size ◽  
Total Duration ◽  
Soccer Players ◽  
Metabolic Power ◽  
Professional Soccer ◽  
Premier League ◽  
Small Effect Size ◽  
Moderate Effect Size ◽  
High Effort

Soccer is a popular team sport and highly demanding activity that requires high effort and long-term training plans. The goals of this study were to compare the accelerations, decelerations and metabolic power between official and friendly full matches, between the first and second halves of the matches, and between both halves of official and friendly matches. Twelve professional soccer players (age, 28.6 ± 2.7 years; height, 182.1 ± 8.6 cm; body mass, 75.3 ± 8.2 kg; BMI, 22.6 ± 0.7 kg/m2) participated in this study. A total of 33 official and 10 friendly matches were analyzed from the Iranian Premier League. All matches were monitored using GPSPORTS systems Pty Ltd. The following variables were selected: total duration of the matches, metabolic power, accelerations Zone1 (<2 m·s−2) (AccZ1), accelerations Zone2 (2 to 4 m·s−2) (AccZ2), accelerations Zone3 (>4 m·s−2) (AccZ3), decelerations Zone1 (<−2 m·s−2) (DecZ1), decelerations Zone2 (−2 to −4 m·s−2) (DecZ2) and decelerations Zone3 (>−4 m·s−2) (DecZ3). The major finding was shown in metabolic power, where higher values occurred in friendly matches (p < 0.05 with small effect size). Furthermore, total duration, AccZ3, DecZ1, DecZ2, and DecZ3 were revealed to be higher in official matches, while AccZ1 and AccZ2 were higher in friendly matches. The second half of the official matches revealed higher values for total duration compared to friendly matches (p < 0.05, moderate effect size). In conclusion, this study observed higher values of metabolic power in friendly matches compared to official matches. AccZ3, DecZ1, DecZ2, and DecZ3 were higher in official matches, while AccZ1 and AccZ2 were higher in friendly matches.

Biological maturation influences selection process in youth elite soccer players

2022 ◽  
Author(s):  
Marcelo Massa ◽  
Alexandre Moreira ◽  
Renato A. Costa ◽  
Marcelo R. Lima ◽  
Carlos R. Thiengo ◽  
...  
Keyword(s):  
Selection Process ◽  
Soccer Players ◽  
Biological Maturation

scholarly journals Reproducibility and inter-observer agreement of Greulich-Pyle protocol to estimate skeletal age among female adolescent soccer players

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Yuri V. Faustino-da-Silva ◽  
Diogo V. Martinho ◽  
Manuel J. Coelho-e-Silva ◽  
João Valente-dos-Santos ◽  
Jorge Conde ◽  
...  
Keyword(s):  
Female Adolescent ◽  
Skeletal Age ◽  
Observer Agreement ◽  
Soccer Players ◽  
Biological Maturation ◽  
Reproducible Method ◽  
The Mean ◽  
Mean Differences ◽  
The Impact

Abstract Background Skeletal age (SA) is considered the best method of assessing biological maturation. The aim of this study was to determine intra-observer (reproducibility) and inter-observer agreement of SA values obtained via the Greulich-Pyle (GP) method. In addition, the variation in calculated SAs by alternative GP protocols was examined. Methods The sample was composed of 100 Portuguese female soccer players aged 12.0–16.7 years. SAs were determined using the GP method by two observers (OB1: experience < 100 exams using GP; OB2: experience > 2000 exams using several methods). The radiographs were examined using alternative GP protocols: (wholeGP) the plate was matched to the atlas as an overall approach; (30-boneGP) bone-by-bone inspections of 30-bones; (GPpmb) bone-by-bone inspections of the pre-mature bones only. For the 30-boneGP and GPpmb approaches, SA was calculated via the mean (M) and the median (Md). Results Reproducibility ranged 82–100% and 88–100% for OB1 and OB2, respectively. Inter-observer agreement (100 participants multiplied by 30 bones) was 92.1%. For specific bones, agreement rates less than 90% were found for scaphoid (81%), medial phalange V (83%), trapezium (84%) and metacarpal V (87%). Differences in wholeGP SAs obtained by the two observers were moderate (d-cohen was 0.79). Mean differences between observers when using bone-by bone SAs were trivial (30-boneGP: d-cohen less than 0.05; GPpmb: d-cohen less than 0.10). The impact of using the mean or the median was negligible, particularly when analyses did not include bones scored as mature. Conclusion The GP appeared to be a reasonably reproducible method to assess SA and inter-observer agreement was acceptable. There is evidence to support a recommendation of only scoring pre-mature bones during later adolescence. Further research is required to examine whether these findings are consistent in younger girls and in boys.

The relationship between physical match performance and 48-h post-game creatine kinase concentrations in English Premier League soccer players

2016 ◽  
Vol 11 (6) ◽  
pp. 846-852 ◽  
Author(s):  
A Scott ◽  
JJ Malone ◽  
R Morgans ◽  
D Burgess ◽  
W Gregson ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Tracking System ◽  
Correlation Coefficients ◽  
Soccer Players ◽  
Large Individual ◽  
Premier League ◽  
Coaching Process ◽  
The Relationship ◽  
English Premier League ◽  
Physical Match

The aim of the investigation was to determine the relationship between blood creatine kinase and physical match performance in 15 elite male soccer players competing in the English Premier League. Blood samples were collected 48 h following a competitive match and analysed for creatine kinase concentration immediately after collection. Physical match performance data were collected using a computerised tracking system (Prozone®) from >6 matches for each player. Mean ± S.D creatine kinase concentration 48 h post-match was 520 ± 224 µ.mol.l−1. Large individual variation in creatine kinase response at this time point was observed (184 µ.mol.l−1 to 1573 µ.mol.l−1). No significant correlation coefficients were observed between the chosen indicators of physical match performance and creatine kinase concentration 48 h post-match. These data suggest that creatine kinase concentrations are elevated as a consequence of playing a soccer match. Creatine kinase may also be of limited value in supporting important decisions in the coaching process.

scholarly journals Energy Requirements of Male Academy Soccer Players from the English Premier League

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Marcus P. Hannon ◽  
Lloyd J. F. Parker ◽  
Daniel J. Carney ◽  
John McKeown ◽  
John R. Speakman ◽  
...  
Keyword(s):  
Soccer Players ◽  
Energy Requirements ◽  
Premier League ◽  
English Premier League
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