유산소성 운동의 강도가 초등학교 고학년의 체지방율 및 기초체력에 미치는 영향

Abstract

Childhood is the time when one undergoes rapid physical growth, shows a significant change in height and weight, hence weight management(i.e. body fat management) for fitness is a high priority. Thus, this study was conducted to develop an exercise program for the promotion of health and prevention of obesity and present the preliminary data by investigating the effect of aerobic exercise on body fat and fundamental physical ability. Thirty subjects who are in 6th grade in 'H', 'N', 'B' elementary school randomly divided into two groups: exercise group A(n=10)(40-60% HRmax), exercise group B(n=10)(60-80% HRmax), and control group(n=10). Exercise groups exercised 40 minutes/day, 3 days/week, during 6 weeks, and then body fat rate and fundamental physical ability(muscle strength, flexibility, cardiopulmonary endurance, speed) were evaluated. Data analysis was performed by using SPSS ver. 18.0(especially, one-way ANOVA and paired t-test) with significant level =.05. The results are as follows:

1. In body fat rate, while group A(0.8%, p<.05) and group B(1.68%, p<.001) significantly decreased, control group significantly increased(0.23%, p<.05). 2. In muscle strength, group A(1.14kg, p<.001), group B(1.84%, p<.001), and control group(0.32kg, p<.05) significantly increased. 3. In flexibility, group A(1.51cm, p<.001), group B(2.54cm, p<.001), and control group(0.45cm, p<.05) significantly increased. 4. In cardiopulmonary endurance, while group A(-21.8s, p<.001) and group B(-32.4s, p<.001) significantly decreased, control group(1.7s) increased. 5. In speed, while group A(9cm, p<.001) and group B(20.6cm, p<.001) significantly increased, control group(-2.9cm) decreased.

In summary, an aerobic exercise caused a significant change in children's body fat rate and fundamental physical ability. Especially, exercise group of high intensity showed a much change in all parameters. Therefore, an aerobic exercise would improve muscle system and cardiopulmonary function for promotion of fitness, and it would have positive effects on the prevention of obesity and metabolic syndrome risks.