Physiological effects of aerobic and anaerobic exercises are frequently investigated. However, it is considered that combined exercises may be more effective. The aim of this study was to investigate the effect of aerobic and combined exercise program on some biochemical parameters. The study group consisted of 45 male volunteers with sedentary life. The participants were divided into three groups as control (n: 15), aerobic exercise (n: 15) and combined exercise (n: 15). The control group did not perform any exercise. Aerobic and combined exercise groups participated in the exercise program 4 days a week for 10 weeks. Blood samples were taken from the participants twice. TSH, T3, T4, AST, ALT, Uric acid and glucose levels were determined in blood samples. SPSS software was used for the analysis of the data and the significance level was accepted as p <0.05. As a result of analysis; no difference was observed in the control group (p> 0.05). In the aerobic exercise group, T3, AST, Uric acid levels of post test were found to be different according to baseline, while in the combined exercise group, there were significant differences in T3, AST, Uric acid and glucose levels between pre and post test values (p <0.05). As a result, it was determined that both aerobic and combined exercises had effects on biochemical parameters (thyroid hormones, liver enzymes, Uric acid and glucose). According to this study it can be said that combined exercises may be more effective than aerobic exercises.