Abstract
Aim: Although beneficial effects of physical exercises on adulthood obesity are well known, it is unclear how physical exercises affect thyroid hormone related body composition, basal metabolic rate and thermogenesis in obese children. Our objective is to examine the effects of physical exercise program on 3-5-3’triiodothyronine (T3) and 3-5-3’-5’tetraiodothyronine (T4) in obese boys. Materials and Method: Our study consisted of 10 obese boys (aged from 13 to 15) and a control group of 10 healthy boys age and gender matched. Before exercise program, 10 ml blood samples were taken from the obese and control group boys; and 10 ml blood samples were taken from the obese boys after program exercise 3 days/week for 12 weeks. The lipid profiles, creatine kinase (CK), creatine kinase-MB, T3 and T4 levels in blood samples were measured for both groups. Results: In present study, it was found that control group and obese boys after aerobic exercise had significantly higher T3 and T4 levels (1.63±0.17; 9.80±0.93 and 1.70±0.10; 10.1±0.54, respectively) and significantly lower CK levels (142.7±4.11 and 151.8±3.70, respectively) than those of obese boys before aerobic exercise (1.19±0.81; 7.37±0.47 and 165.3±2.49, respectively). Furthermore, it was found that aerobic exercise significantly decreased triglyceride and cholesterol levels in obese boys (104.0±3.77 and 193.7±2.90, respectively). Conclusion: When these findings are taken into account, it may be suggested that aerobic exercises can help with the improvement of decreased thyroid hormone levels which may be cause a weight increase together with a decrease in basal metabolic rate and thermogenesis in obese boys.
Highlights
MATERIALS AND METHODSThe prevalence of obesity worldwide has reached epidemic dimension includingte children and adolescents [1]
The present study results provide evidence that exercise do not have only positive effect on weight loss and have effect on regulating of lipid profiles, creatine kinase (CK) activity, and thyroid gland metabolism in obese boys.we found that there was no significant difference between control and post-exercise obese children in terms of TG and high density lipoprotein (HDL)
Consistent with previous studies [21], we found that the mean post-exercise Total Cholesterol (TC), TG, low density lipoprotein (LDL) and HDL levels of obese children were found to be closer to those of the control values
Summary
The prevalence of obesity worldwide has reached epidemic dimension includingte children and adolescents [1]. Secular and cross-sectional trends indicate an increase in childhood and adolescent obesity, in developing countries [2]. Childhood and adolescent obesity has been associated with changes in the activity types from outdoor games to indoor entertainment such as computer games, internet and television [3]. Previous studies showed that adolescents who continuously joined in outdoor activities had lower prevalence of obesity, with the threat being three times higher in those not joining in such activities [6]. Regular physical exercise has been used as a significant practice for protection and treatment of obesity by developing physical qualities that positively modify psychosocial well-being, body composition, metabolic activity and cardiorespiratory fitness by attenuating the comorbidities related with excess fat tissue [7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
