| Autor: |
Housh TJ; Center for Youth Fitness and Sports Research, University of Nebraska-Lincoln 68588-0138., Johnson GO, Hughes RA, Housh DJ, Hughes RJ, Fry AS, Kenney KB, Cisar CJ |
| Jazyk: |
angličtina |
| Zdroj: |
Medicine and science in sports and exercise [Med Sci Sports Exerc] 1989 Feb; Vol. 21 (1), pp. 105-9. |
| DOI: |
10.1249/00005768-198902000-00019 |
| Abstrakt: |
The purpose of this study was to determine the changes in body composition as well as absolute and relative isokinetic forearm and leg strength of high school wrestlers across age. One hundred ninety-five wrestlers (means age +/- SD = 16.36 +/- 1.12 yr) volunteered to be measured for strength using a Cybex II dynamometer at 30, 180, and 300 degrees.s-1. In addition, underwater weighing was used to determine body composition characteristics. The subjects were divided into four age groups: group 1 (G1) = 14.17-15.00 yr (N = 20); group 2 (G2) = 15.01-16.00 yr (N = 60); group 3 (G3) = 16.01-17.00 yr (N = 52); and group 4 (G4) = 17.01-18.50 yr (N = 63). One-way ANOVA or ANCOVA with Tukey post hoc comparisons indicated significant (P less than 0.05) changes across age for height, body weight, and fat-free weight, as well as absolute and relative forearm and leg strength. The results of this study indicated that, while a large portion of the improvements in strength across age were associated with increases in lean tissue, there was an additional "age effect" which could not be accounted for by changes in fat-free weight. Although the mechanism responsible for the "age effect" is unclear, it is possible that neural development contributed to the strength increases across age. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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