| Autor: |
LAW, ANDREW S., MORRISON, JO P. |
| Zdroj: |
Biology of Exercise; 2019, Vol. 15 Issue 2, p57-67, 11p, 1 Chart, 4 Graphs |
| Abstrakt: |
During exercise there is a withdrawal of parasympathetic activity and increase in sympathetic activity. Different types of exercise have differential effects on autonomic tone. Five well trained males completed two cycling training sessions separated by one week. The endurance (END) training session was 20 min at 60% peak power output (PPO). The high intensity interval training (HIIT) session consisted of 15 seconds work at 130% PPO and 45 seconds recovery at 30% PPO. Amount of work was controlled between sessions. Heart rate variability was measured pre and post training. The root mean square of successive differences (RMSSD), high frequency (HF), and low frequency (LF) domains were determined. There was a significant decrease (p=0.002) in lnRMSSD from pre (3.35 ± 0.43 ms) to post (1.62 ± 0.52 ms) training for HIIT training but not for END training. There was a significant increase (p=0.005) in lnLF/lnHF from pre (1.02 ± 0.04) to post (1.48 ± 0.2) training for HIIT training but not for END training. The decrease in lnRMSSD and the increase in lnLF/lnHF ratio after HIIT indicates a delay in parasympathetic reactivation following HIIT exercise. Coaches should consider the timing of HIIT exercise bouts to ensure proper recovery after training. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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