عنوان مقاله [English]
Purpose & Background: Maintenance of the core temperature requires additional energy for thermoregulation during and after exercise if environmental temperatures are outside the thermoneutral zone, either below (cold) or above (warmth/heat). The purpose of this study was to investigate the acute effect of interval exercise in temperate, warm and cold water on plasma levels of acylated ghrelin (AG) and peptide YY. Methodology: In this quasi-experimental study, 13 overweight young women were selected randomly and performed three sessions interval exercise at ~65% of VO2max for 40min in temperate, warm and cold water (24-25, 36.5-37.5 and 16.5-17.5 ° C respectively) on three separate days. Blood sampling was done before and after each session. Results: The AG level decreased significantly after exercise in temperate, warm and cold water (P≤0.05). This peptide level also decreased significantly in cold water compared to warm water (P=0.05), but there was no significant difference between temperate-warm and temperate-cold water (P>0.05). The level of peptide YY increased significantly in temperate, warm and cold water (P≤0.05), and this increase higher than in cold water compared to temperate water (P=0.04), but there was no significant between clod-warm water and temperate-warm water (P>0.05). Conclusions: It seem that exercise in water (independent of water temperature), due to decrease and increase the levels of appetite and anti-appetite hormones respectively, result in decrease appetite after exercise, but since the range of these changes was higher in cold water, it is expected that anti-appetite effects of exercise be more severe in cold water.