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Low-Frequency Vibration Facilitates Post-Exercise Cardiovascular Autonomic Recovery
Kuo-Cheng Liu1, Jong-Shyan Wang2,3,4, Chien-Ya Hsu1
1Department of Physical Medicine & Rehabilitation, Chang Gung Memorial Hospital, Linkou, Taiwan.
Journal of Sports Science & Medicine
|July 16, 2021
Summary
Low-frequency lower-body vibration (LBV) effectively accelerates post-exercise cardiovascular autonomic recovery. Applying 15 Hz LBV post-exercise reduced vascular tone and enhanced heart rate recovery by promoting parasympathetic activity.
Area of Science:
- Exercise Physiology
- Cardiovascular Autonomic Regulation
- Vibration Therapy
Background:
- Post-exercise recovery is crucial in sports, with vibration shown to reduce muscle soreness.
- Existing research on vibration's cardiovascular effects is heterogeneous, often focusing on high-frequency applications.
- The impact of low-frequency lower-body vibration (LBV) on cardiovascular autonomic recovery remains underexplored.
Purpose of the Study:
- To investigate the effects of low-frequency LBV on post-exercise heart rate variability (HRV) and peripheral arterial tone.
- To compare the efficacy of different low-frequency vibration levels (5 Hz and 15 Hz) on recovery metrics.
Main Methods:
- Ten men and nine women (20-25 years) participated in three sessions with 0, 5, or 15 Hz LBV for 10 minutes post-exercise.
- Measurements included heart rate variability and digital volume pulse wave during vibration and recovery phases.
- Exercise consisted of a static standing control and a 3-minute step test.
Main Results:
- A 15 Hz LBV application decreased the reflection index (peripheral vascular tone) during the vibration phase.
- Heart rate reduction was observed in the 15 Hz group during recovery phases.
- Analysis of HRV indicated decreased low-frequency/high-frequency power ratio (LF/HF) and increased normalized high-frequency power (nHF) with 15 Hz LBV, and with 5 Hz LBV during the later recovery phase.
Conclusions:
- Low-frequency LBV, particularly at 15 Hz, effectively accelerates cardiovascular autonomic recovery post-exercise.
- LBV application reduces peripheral vascular tone, enhances heart rate recovery, and modulates autonomic nervous system activity.
- Findings suggest LBV as a viable method to improve post-exercise recovery.
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