Comparison of Heart Rate Variability during Playing Video Game and Cycle Exercise
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The purpose of the present study was to compare heart rate variabilities during playing a video game and physical exercise at the same heart rate (HR) level. Six healthy male subjects played the video game. The mean HR during playing the computer game was defined as the target HR. Then, subjects performed a bicycle exercise at the target HR. Electrocardiogram (ECG) was recored during experiment. R-R intervals were detected and resampled by 8Hz from ECG recordings. Power spectral densities were estimated by the direct method for last five minutes at rest, load and recovery. The low frequency (LF) powers (ms^2) were integrated from 0.04 to 0.15Hz and the high frequency (HF) powers were integrated from 0.15 to 0.5Hz. Natural logarithmic transformations of LF and HF powers were used to stabilize the skewness of raw data. The results of ANOVA showed a significant effect of periods (p<0.05) and no significant effects of workloads and the interaction between the two factors. Significant differences in the ratio of LF and HF powers during playing the video game between at rest and load was observed. Significant differences in HF during mild levels of cycle exercise between at rest and load, and between at load and recovery was also observed. While during physical exercise, HR was thought to increase primarily due to the withdrawal of vagal nervous system activity, the contribution of sympathetic nervous system activity might be larger in the video game than in the cycle exercise.
- Bulletin of health sciences Kobe
Bulletin of health sciences Kobe (22), 1-7, 2006