| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
1)Study purpose
A heartbeat count is controlled by balance of cardiac sympathetic and vagal nervous activities. Only relativity relation of neither is expressed in examination of the autonomous nervous system recovery process from exercise by a heartbeat count. The purpose of this study is to evaluate activities of cardiac sympathetic and vagal nervous system by using time-frequency analysis of heart rate variability.
2)Results
I developed a program for RR wave detection during exercise and recovery, and it seemed to be expected, and is not enough, became stable as result in 1998 with R wave detection by law up to now by the time when a change of electrocardiogram RR interval was extremely big afresh. I did eight minutes and examined exercise of fixed load strength of 100-210 watts in 21 healthy men and women on the basis of this technique by doing frequency analysis between time for the data that continuation of electrocardiogram RR interval measured recovery process for 20 minutes. Frequency analysis between time was Fourier transfer between short time and Wavelet transfer in extra experiment by 1998, but added Gabor transfer to this in this experiment. The center frequency of breathing number ingredient in exercise recovery process and Mayer wave ingredient was Fourier transfer between short time and visual detection was possible, but reached difficulty by all examples by Wavelet transfer in 21 example all example. It became clear that Gabor transfer had an in-between characteristic of Fourier transfer between short time and Wavelet transfer. But I was contrary to this in time mine shaft solution ability, and Wavelet transfer was advantageous, and average of the head between analysis time was expressed by Fourier transfer between short time. It became clear that first cardiac vagal nerve line activity recovered in the process that synthesis, and I exercised, and a change of neither was restored, and late, and cardiac sympathetic nervous activity would recover.
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