Poster Sessions - Musculoskeletal System
Seasonal Changes in Physical Fitness of Adolescent Track and Field Athletes
2016 年 62 巻 Suppl.1 号 p. 189-193
詳細
2016 年 62 巻 Suppl.1 号 p. 189-193
Introduction: Athletic season is roughly divided into three seasons in Japan, namely the physical training season in winter, the pre-competition season in spring and the competition season between summer and autumn. Therefore, it is generally thought that aims, contents, volume, and programs of workout are different by seasons. For that reason, physical fitness levels of athletes may fluctuate through a year. Thus, the purpose of this study was to identify seasonal changes in physical fitness of adolescent track and field athletes.
Methods: Subjects were 11 boys and 7 girls of two different high schools. Tests are performed in each season. We applied assessments of physical fitness: 100 m sprint running, three kinds of vertical jump (squat jump, counter movement jump, and drop jump), single-joint isometric torque (knee extension, knee flexion, dorsiflexion, and plantar flexion), and anthropometric characteristics.
Results: Friedman test and post hoc Wilcoxon test revealed that many of physical fitness parameters of boy athletes were higher at the competition season compared with in the other seasons. In girls, only counter movement jump and body weight were significant differences among seasons.
Discussion: This study was found that physical fitness of adolescent track and field athlete varied through seasons. Especially, it was trend to improvement of the muscle strength and power output in the competition season.
Conclusion: Seasonal changes were found in physical fitness of adolescent track and field athletes. Moreover, sex differences were found in the trends in seasonal changes.
