THE EFFECTS OF LAND, NORMAL WATER, AND WARM WATER AEROBIC EXERCISES ON HEART RATE VARIABILITY IN RECOVERY PERIOD IN HEALTHY YOUNG MEN

The purpose of this study was to investigate the effects of land, warm and normal
water aerobic exercises on heart rate variability in recovery period on healthy young men.
Materials & Methods: In this study, subjects were randomly divided into four groups (control, Land
aerobic exercise, normal water aerobic exercise, and warm water aerobic exercise) and performed
regular aerobic exercises for 20 days. Heart rate variability was measured in three pre-test, recovery
period after the first training session and post-test. For analysis of data, one-way and repeated measured
ANOVA, Bonferroni's post hoc test and effect size were used.
Results: Aerobic exercise land condition causes a significant change in low frequency, high frequency
and ration of low-frequency to high frequency wavelengths during recovery and post-training (p<0.001).
Aerobic exercise in a water environment with normal and warm temperatures caused a non-significant
change (p<0.05) in low-frequency waves both during recovery and after exercise, a significant change
in the waves with high frequency and ration of low frequency to high-frequency waves during recovery
(p<0.001) and unusual change in high-frequency waves and ration of low-frequency wavelengths to
high-frequency waves in the post-training period (p<0.05).
Conclusion: In the recovery period, the aerobic exercise environment causes changes in the overcoming
of sympathetic system, but the parasympathetic system does not affect the aerobic training environment.
Also, after the short aerobic training period, the training environment causes changes in overcoming of
sympathetic and parasympathetic systems