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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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AUTONOMIC NERVOUS ACTIVITY AND LIPID OXIDATION POSTEXERCISE WITH CAPSAICIN IN THE HUMANS |
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Ki Ok Shin, Nam Hwoeh Yeo and Sunghwun Kang  |
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Department of Physical Education, College of Sport Sciences, Dong-A University, Busan, Korea |
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© Journal of Sports Science and Medicine (2010) 9, 253 - 261 |
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| ABSTRACT | |||
| This study evaluated the synergistic effects of acute exercise
with capsaicin (200mg) upon the restoration of cardiac autonomic functions
and depolarization- repolarization interval as well as substrate oxidation.
Nine healthy males [21.9(0.8) yrs] volunteered for this study. Cardiac autonomic
activity, metabolic responses, and the ECG QT intervals were continuously
measured during 5 min at rest and postexercise recovery after 30 min exercise
at 50% VO2max on a stationary ergometer with placebo (ECON) or
capsaicin intake (ECAP), and no exercise control (NCON) were randomized.
Results indicated that the HF power reflecting parasympathetic activity
significantly returned to the baseline much faster during ECAP than ECON
trial during postexercise [122.1 (23.2) vs. 60.2 (11.7) %, p < 0.05].
The ECAP trial significantly decreased RQ [0.79(0.02) vs. 0.85 (0.03), p
< 0.05] with significantly greater fat oxidation [69.3 (6.0) vs. 49.4
(10.8) %, p < 0.05] in comparison to NCON trial during 120 min postexercise
recovery without any adverse effects on cardiac electrical stability as
determined by trigger-averaged ECG QT interval analyses. We suggest that
capsaicin before the exercise may contribute to the improvement of cardio-protective
functions and metabolic responses as one of the beneficial supplements accelerating
faster restoration of autonomic activity and enhanced lipolysis during postexercise
recovery without any adverse effects on cardiac electrical stability.
Key words: Autonomic nervous system, heart rate variability power spectral analysis, cardiac depolarization-repolarization interval, post-exercise recovery, lipolysis. |
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