복합운동 프로그램 유형이 건강관련체력, 에너지 기질 및 대사관련 호르몬에 미치는 영향

Abstract

The purpose of this study was to investigate the effect of combined exercise program types on health-related physical fitness, energy substrates and metabolic hormones. The subjects for this study were 24 healthy male university students who participated in this experiment voluntarily and didn't have any disease. The subjects were divided into three groups: the group of aerobic exercise after resistance exercise(n=8), the group of resistance exercise after aerobic exercise(n=8), and control group(n=8). Both the experimental groups were conducted a combined exercise program of different order for 12 weeks. Resistance exercise was conducted four times a week with the intensity of 60 ～ 70% of 1RM during the 1st throughout 8th week and the intensity of 70 ～ 80% of 1RM during the 9th throughout 12th week. Aerobic exercise was conducted four times a week with the intensity of 60 ～ 70% of maximum heart rate during the 1st throughout 8th week and the intensity of 70 ～ 80% of maximum heart rate during the 9th through 12th week. Statistical techniques for data analysis were repeated measure ANOVA to determine the differences(3 groups X 3 times) and Duncan's multiple rage for post-hoc. The 5% level of significance was utilized as the critical level for acceptance of hypotheses for the study. The conclusions are as follows.

1. Changes of the health-related physical fitness

In the changes of body composition, weight was no significant difference in between the group of aerobic exercise after resistance exercise and the group of resistance exercise after aerobic exercise. Body fat was significantly decreased in the two groups after 8 weeks exercise, and the group of aerobic exercise after resistance exercise showed a significant increase of LBM after 8 weeks exercise. In both the exercise groups, flexibility, muscular endurance, muscular strength and cardiovascular endurance were significantly increased more than the control group. The result of this study was more an effective method by the type of program than the other.

2. The changes of energy substrates

There was no significant difference in glucose and free fatty acid being used by elements of energy substrates between the group of aerobic exercise after resistance exercise and the group of resistance exercise after aerobic exercise. Lactic acid, however, significantly decreased in the group of aerobic exercise after resistance exercise ( 0 > 12 weeks ) and in the group of resistance exercise after aerobic exercise ( 0 > 8, 12 weeks ) compared to control group, respectively.

3. The changes of metabolic hormones

Testosterone and epinephrine were significantly higher in both the group of aerobic exercise after resistance exercise and the group of resistance exercise after aerobic exercise compared to control group after 8 weeks, the increased values in both exercised groups showed similar results. In the group of resistance exercise after aerobic exercise, insulin was significantly decreased, otherwise, growth hormone and norepinephrine in that group significantly increased. The result of this study think that the method of resistance exercise after aerobic exercise was more effective than the other type of program. In conclusion, the results of this study suggest that the program which conducted aerobic exercise after resistance exercise can contribute to the better effect than the program which conducted resistance exercise after aerobic exercise in the aspect of improving body composition in relation to the obesity. Also, the present study showed that in metabolic hormones, the program which conducted resistance exercise after aerobic exercise was more effective than the program which conducted aerobic exercise after resistance exercise in the aspect of making lipid metabolism better by decreasing insulin levels. The both exercised groups showed a similar effect regardless of the order of execution of exercise in the elements of physical fitness and energy metabolism. Therefore, it is wished that further studies be carried out on the effect and development of combined exercise program.