Introduction: Overweight and obesity are health concerns in modern societies, especially among children . Many diseases of adulthood, such as type 2 diabetes, high blood pressure, heart diseases and some cancers, have their roots in childhood and adolescent obesity. The present study investigates the effect of Eight –Weeks of combined exercise and caffeine supplementation on body composition, anaerobic capacity and fatigue index in overweight male students aged 12 to 15years.

Methods: In this study, 30 students were divided into three equal groups of caffeine supplement, combined exercise + supplement, and combined exercise. . The groups of combined exercise and supplement+exercise (endurance and resistance exercises) performed the exercise protocol for 8 weeks and 3 sessions per week based on the principle of overload, and the groups of supplement and supplement+combined exercise took 5 mg daily per kilogram of body weight. After finishing the exercises, they consumed caffeine. Factors evaluated included anaerobic power peak, anaerobic power, fatigue index based on Rast test and body composition based on three-point caliper calorimetry. One-way analysis of variance and paired t-test were used to examine the differences between groups and within groups, respectively.


Results: The results showed that eight weeks of combined exercises with caffeine supplementation had a significant effect on body composition, anaerobic capacity and fatigue index of students. Also, the significance level in the test between groups was greater than 0.05 in all indices except the aerobic capacity index. And the average indices of peak anaerobic power, fatigue index and body composition were not different in the groups


Conclusion: According to the results, it seems that caffeine supplementation along with combined exercises was effective in significantly increasing anaerobic power, peak anaerobic power, fatigue index and reducing body fat percentage of students. So, it is recommended to use caffeine supplement along with exercise.