Document Type : Research Paper
Authors
1 Assistant Professor of Sport Physiology, Payame Noor University (PNU), Tehran, Iran
2 Heart and Thorax Surgeon, Physical Medicine Specialist
3 M.Sc. in Sport Sciences, Sport Sciences Research Institute
Abstract
This study examined the effects of melatonin supplementation on cardiac function after exhaustive exercise in the active elderly. The sample consisted of 8 active elderly between the ages of 50 and 65 years (mean age of 65.8±5.9, height of 168.1±7.2, and weight of 74.7±8.7) who had at least two exercise session at week. The research had executed by crossover, double-blinded, placebo and supplement plan. After explanation, subjects signed consent form; and changes in heart rate, contraction of cardiovascular and hemodynamic rest period before exercise and during active recovery after exercise were measured by electrocardiography and cardio screen devices. Data analysis was performed by two-way ANOVA with repeated measurements and Bonferroni post hoc test. The results showed that melatonin supplements significantly improved heart rate recovery after exercise, also had no significant improvement in oxygen consumption. The supplement had no effect on resting heart rate and vascular resistance to blood. According to the results, melatonin had a moderating influence on sympathetic system, and it is a beneficial effect in elderly people during sports activities. Therefore, more research is needed to draw firm conclusions and test higher doses.
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Main Subjects
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