The effect of a period of aerobic training at different times of day on serum changes of obestatin and dopamine of non-athlete obese men
Subject Areas : Sport Sciences Quarterly
bahman Zadeh-Hendijani
1
,
صدیقه حسین پور دلاور
2
*
,
محمد کریمی
3
,
مهران قهرمانی
4
1 - Department of Exercise Physiology, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
2 - گروه تربیت بدنی و علوم ورزشی، دانشگاه آزاد اسلامی، واحد کرمانشاه، کرمانشاه، ایران
3 -
4 - استادیار گروه فیزیولوژی ورزشی، واحد گیلان غرب، دانشگاه آزاد اسلامی، گیلان غرب، ایران.
Keywords: obesity, circadian rhythm, aerobic training, obestatin, dopamine,
Abstract :
Maintaining proper weight and body composition over long periods of time requires a balance between energy intake and expenditure. On the other hand, regulating energy balance is a complex issue and multiple mechanisms are involved in weight regulation. One of the effective factors in relation to energy balance in the body is the issue of circadian rhythm. The aim of the present research was to study the exercise effects on serum obestatin and dopamine levels in obese non-athletic men for 8 weeks at different times of day. In a quasi-experimental study with pretest-posttest design, 36 young non-athlete man with means of age 25.4±3.3 years, weight 98.3±7.7 kg and body mass index 31.8±1.1 kg.m-2, were selected purposely and available as subject. The subjects divided randomly one of the equal groups of control, morning training and evening training. Training program was consisted of eight weeks and three sessions per week with intensity of 60-70 percent of maximum heart rate. Before and after training intervention.blood sampling was performed at 10 hours fasting state. Data were analyzed by using one-way analysis of variance and at significant level of less than 5%. The results indicated that training at morning and evening causes to significant increase in dopamine (p=0.0001) and obestatin (p=0.0001) levels. In comparison between morning and evening training, dopamine changes (p=0.0001) was more at the evening and obestatin changes was more at the morning. Based on the findings, aerobic training with moderate intensity may have positive effects on changes in hormones involved in the issue of appetite. It seems that circadian rhythm may be effective in these changes and training at evening have more effects on hormones involved in the discussion of appetite
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