| 저항성운동이 심박수변이도와 근력에 미치는 영향 |
| 강서정, 김기정 |
| 서울대학교 |
| The effects of resistance training with various intensity on Heart Rate Variability and muscle power |
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| ABSTRACT |
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Kang, S.J., Kim, K.J. The effects of resistance training with various intensity on Heart Rate Variability and muscle power. Exercise Science, 14(4): 461-470. 2005. The purpose of this study was to examine the effects of resistance training on HRV and muscle power utilizing two different training intensities. Fifteen healthy men and women (M=21±1.3) trained 3 times a week, for 8 weeks. At the beginning of the study, subjects were randomly assigned to either a low-intensity group (LG, n=8) or a high-intensity group (HG, n=7). The LG performed 3 sets of 16 repetitions at 40% of 1RM, and the HG performed 3 sets of 8 repetitions at 80% of 1RM. HRV, muscle power, and aerobic capacity (O2max) were measured and compared before and after intervention. Two-way ANOVA for repeated measures were performed on all variables (p<.05). Dependent t-test was used to compare the differences between pre and post values in 2 groups. Results showed that HRV variables within the groups were not affected by training. However, a significant difference in RR-interval within group (F= 3.587, p<.05) and between the 2 groups (F=868.693, p<.05) were found. All measurements of muscle power were significantly increased (p<.05) except right side of leg extension(kg, %). Resting heart rate (HRrest) showed no significant differences within and between the groups. O2max within the groups was significantly different (F=15.694, p<.05), and their values were enhanced in LG(t=-2.768, p=.028) and HG(t=-3.337, p=.016) after 8 weeks of resistance training. Although evidence supports beneficial muscular and cardiovascular adaptations, the results demonstrate that resistance training does not affect HRV variables except RR-interval in young, healthy subjects. |
| Key words:
Heart Rate Variability, Resistance training, O2max. |
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