단체줄넘기 운동이 남자중학생의 건강관련체력, 성장호르몬 및 인슐린양성인자(IGF-Ⅰ)에 미치는 영향

Abstract

The purpose of this study was to investigate the effect of group jump rope exercise on health-related fitness, growth hormone (GH), and insulin growth factor-Ⅰ(IGF-Ⅰ) in male middle school students. Twenty students were randomly selected as study subjects. This study is divided into two groups: the jump rope exercise group (n=10) and the control group (n=10). The exercise group performed a 50-minute group jump rope exercise program 3 times a week for 12 weeks. And the jump rope exercise consisted of long 8-figure marathon, long 4-leap, and long hopping in and jump the roping together. The control group only performed their regular daily activities. Repeated measures ANOVA was used to analyze the difference according to the group and the exercise period. The results showed that the right grip strength and back strength in the jump rope exercise group were further increased when compared to the control group. Jump rope exercise not only significantly decreased body mass index (BMI) and body fat percentage(%BF) but also increased left grip strength, muscle endurance, cardiovascular endurance, and flexibility. In the result of the hormone analysis, jump rope exercise increased GH concentration in the blood but there is no significant between two groups. IGF-Ⅰ in the jump rope exercise group showed significant increase compared to the control group. In conclusion, this study indicates that a 12 weeks of group jump rope exercise may has positive effects on health-related fitness, GH and IGF-Ⅰ in male middle school students.