scholarly journals Selection time and differences in biological maturity of soccer players in Japan Professional Football League Academy

2021 ◽  
Vol 10 (5) ◽  
pp. 269-272
Author(s):  
Ryo Takahara ◽  
Shumpei Miyakawa
Keyword(s):  
Soccer Players ◽  
Professional Football ◽  
Biological Maturity

Professional Football (Soccer) Players Have a Markedly Greater Skeletal Mineral Content, Density and Size Than Age- and BMI-Matched Controls

1998 ◽  
Vol 63 (2) ◽  
pp. 112-117 ◽  
Author(s):  
A. Wittich ◽  
C. A. Mautalen ◽  
M. B. Oliveri ◽  
A. Bagur ◽  
F. Somoza ◽  
...  
Keyword(s):  
Mineral Content ◽  
Soccer Players ◽  
Professional Football

scholarly journals Running Performance and Hormonal, Maturity and Physical Variables in Starting and Non-Starting Elite U14 Soccer Players During a Congested Match Schedule

2021 ◽  
Vol 80 (1) ◽  
pp. 287-295
Author(s):  
Vinicius Zanetti ◽  
Marcelo Saldanha Aoki ◽  
Paul Bradley ◽  
Christopher Carling ◽  
Thomas Kisil Marino ◽  
...  
Keyword(s):  
High Speed ◽  
Soccer Players ◽  
Running Performance ◽  
Salivary Testosterone ◽  
Youth Soccer ◽  
Wide Range ◽  
Significant Difference ◽  
The Difference ◽  
Biological Maturity ◽  
Test Level

Abstract This study examined changes in match running performance (MRP) in Under-14 soccer players (13.5 ± 0.7 yrs) during a congested match schedule (CMS) (4 matches played within a 5-day period). It also examined the difference in salivary testosterone (sT) concentration, somatic maturation, jumping tests, and Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) between the players selected to play (SLG; group who participated in all matches) and players non-selected to play (NSG). A significant difference was observed for the frequency of decelerations (DEC) across matches (match 4 vs. matches 1, 2 and 3; p = 0.05; partial ƞ2 = 0.20). No difference between matches was observed for total running distance (TRD), high-speed running distance (HSRD), and frequency of accelerations (ACC) (p > 0.05). A wide range for within-player coefficient of variation (CV) values was observed for all MRP variables (range: 10.5 = TRD to 30.6 = HSRD). No difference between SLG and NSG for any of the assessed variables was observed (p > 0.05). The findings suggest that DEC was the most pertinent variable for monitoring changes in MRP during the CMS. In addition, at an elite youth soccer level, the biological maturity and fitness might not influence selection to play.

Cross-Sectional Change of Biological Maturity and Neuromuscular Response Ability in Adolescent Soccer Players

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S310
Author(s):  
Hirose Norikazu ◽  
Gakuhari Hideki ◽  
Hirano Atsushi ◽  
Fukubayashi Toru
Keyword(s):  
Soccer Players ◽  
Cross Sectional ◽  
Neuromuscular Response ◽  
Biological Maturity

scholarly journals The Main and Interactive Effects of Biological Maturity and Relative Age on Physical Performance in Elite Youth Soccer Players

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
James Parr ◽  
Keith Winwood ◽  
Emma Hodson-Tole ◽  
Frederik J. A. Deconinck ◽  
James P. Hill ◽  
...  
Keyword(s):  
Physical Performance ◽  
Interactive Effect ◽  
Soccer Players ◽  
Adolescent Male ◽  
Performance Tests ◽  
Strength Index ◽  
Countermovement Jump ◽  
Relative Age ◽  
Professional Soccer ◽  
Biological Maturity

The main and interactive effect of biological maturity and relative age upon physical performance in adolescent male soccer players was considered. Consistent with previous research, it was hypothesised that participants of greater maturity or born earlier in the selection year would perform better in terms of physical performance tests. This cross-sectional study consisted of 84 male participants aged between 11.3 and 16.2 years from a professional soccer academy in the English Premier League. Date of birth, height, weight, and parental height were collected. Sprint, change of direction, countermovement jump, and reactive strength index were considered for physical performance. Relative age was based on the birth quarter for the selection year. Maturity status was based upon the percentage of predicted adult height attained. Linear regression models highlighted that maturation was associated with performance on all but one of the physical performance tests, the reactive strength index. In contrast, relative age only served as a significant predictor of performance on the countermovement jump. This study indicated that physical performance (in the tests studied) seems to be related to the biological maturity status of a player but not their relative age. This finding is important because it suggests that early-maturing players perform better in the majority of physical performance tests, and the commonly held belief that relative age effect influences performance may be overstated.

Cross-Sectional Change of Biological Maturity and Neuromuscular Response Ability in Adolescent Soccer Players

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S310
Author(s):  
Hirose Norikazu ◽  
Gakuhari Hideki ◽  
Hirano Atsushi ◽  
Fukubayashi Toru
Keyword(s):  
Soccer Players ◽  
Cross Sectional ◽  
Neuromuscular Response ◽  
Biological Maturity
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