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Relationship between physical activity and the very low-frequency component of heart rate variability after stroke
Harunobu Usui1, Yuusuke Nishida1
1Department of Rehabilitation Science, Seirei Christopher University, Hamamatsu, Shizuoka, Japan.
Background:
The present study aimed to clarify the relationship between high physical activity (PA) and function of the autonomic nervous system, which is important in the prognosis after stroke. We hypothesized a positive association between PA and the very low-frequency (VLF) component of heart rate variability (HRV).
Methods:
Eight patients participated in this study. PA was measured using an accelerometer, and HRV was measured using a heart rate monitor.
Results:
A significant and positive relationship was observed between the VLF component of HRV and PA. A significant negative relationship was observed between the VLF component of HRV and the duration of inactivity. No significant relationship was identified between the low-to-high frequency ratio of HRV and between the high-frequency component of HRV and PA.
Conclusions:
A positive correlation was observed between the VLF component of HRV and PA in stroke patients. Therefore, the VLF component of HRV links PA to cardiovascular prognosis.
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