چکیده:
Purpose: Changes in the amount of leptin and its relation with the calorie intake after adaptation to aerobic exercise are unknown. The aim of this study was to investigate the effects of two months of aerobic training on calorie intake and the levels of plasma leptin and insulin in young men.Material and Methods: Twenty three male students (age= 19.58 ± 2.12 yr; BMI= 21.63 ± 2.7 kg/m²; weight= 64.86 ± 6.46 kg) were randomly assigned into experimental and control groups. The experimental subjects performed aerobic trainings at 60-85% of their maximum heart rate, three times a week and for eight weeks. 72 hours prior to and after the eight-week aerobic training program, the subjects performed exhaustive exercise and their blood samples were taken in four stages in a non-fasted state before and after the exhaustive exercise.Results: The findings of this study showed that aerobic training had no significant effect on plasma leptin (P=0.16), insulin concentration (P=0.06) and calorie intake (P=0.63) at the rest state after exhausting exercise while there were significant decreases in glucose (P=0.003) levels after exhaustive exercise.Discussion and Conclusion: Lack of significant variations in weight and remarkable negative balance are possible reasons why no change occurred in leptin and calorie intake after aerobic training. It seems that the volume and intensity of training must be higher to induce changes in plasma leptin as this index is highly stable.
خلاصه ماشینی:
"The aim of this study was to investigate the effects of two months of aerobic training on calorie intake and the levels of plasma leptin and insulin in young men.
Key words: Leptin, Calorie intake, Aerobic training, Exhaustive exercise, Young men Introduction Obesity is an increasingly prevalent metabolic condition, which affects not only developed but also developing countries [1].
(2011) found no significant variation in leptin levels in 31 male students following 8 weeks of aerobic training at 50-70% of maximum heart rate.
(2007) reported a decrease in leptin levels in a number of 33 obese women following 4 weeks of aerobic training, 45 minutes per session at 60-85% of maximum heart rate [17].
Considering the adverse effects of obesity on health and the potential role of exercise in reducing the complications induced by obesity, the present study aims to investigate the effects of two months of aerobic training on calorie intake and the levels of plasma leptin and insulin in young male students.
Results The present findings showed that aerobic training induced no significant changes in physical and physiological characteristics of the participants, including weight; BMI and maximum oxygen consumption (see Table 1).
(2011) reported no significant variation in the levels of leptin following 8 weeks of aerobic training at 50-70% of maximum heart rate.
The results of the present study showed that a session of exhaustive exercise both before and after the aerobic training protocol significantly reduced plasma glucose in both groups."