Document Type : Research Paper
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Abstract
The purpose of this study was investigation effects of low and high intensity aerobic exercise on energy intake, appetite and energy-regulating hormones. Sixteen sedentary (age 22.09±1.44 yr, height 172.55±6.33 cm, weight 70.55±8.90 kg, fat percent 17.95±4.30) men were randomly divided in low (55% MHRR for 45 min/day n=8) and high (75% MHRR for 30 min/day n=8) intensity exercise groups. All subjects participated in two experimental conditions with two days apart include five days control with no exercise, and five days exercise. Subjects recorded dietary intake using a food diary and self-weighed intake during each five days. Visual analogue scale (VAS) completed at each morning in fasted state. The level of acylated ghrelin, insulin, leptin, and glucose were measured in the morning at 6th day in fasting status after control and exercise conditions. No significant changes were found in absolute energy intake, appetite rate and level of acylated ghrelin and leptin between conditions (p>0.05). Interestingly, relative energy intake was significantly lower after exercise in the low-intensity exercise group (p=0.018). However, insulin (p=0.041) and glucose (p=0.022) concentration reduced significantly after exercise condition in the high-intensity exercise group. Finally, it can be concluded that low-intensity exercise is more effective in negative energy balance and high-intensity exercise is more impressive for reducing insulin and glucose concentration
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