Blood hypercoagulability or thrombogenicity can be one of the main causes of cardiovascular diseases in the young population without traditional pathologic risk factors such as diabetes mellitus, hypertension or hyperlipidemia. The effect of aerobic exercise on coagulation and fibrinolysis has been studied extensively and the effectiveness of resistance exercise to increase the functional capacity of men has been documented. The aim of this study was to examine the effects of aerobic and

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... d aerobic-resistance exercise on the coagulation activity of healthy young men. Methods: 30 young healthy sedentary men (20 ± 5 years old) were randomly divided in 3 groups of aerobic, combined aerobic-resistance and nontraining control groups (n = 10 in each group). The aerobic training group subjects were engaged in a program including 10 sessions of exercise on cycle ergometer. Sessions were 24-min long with a submaximal intensity and were held 3 times a week. The combined group had 12 min of resistance exercise, followed by a 12 min aerobic exercise on cycle ergometer in each session. Results: The results revealed that PT was decreased and PTT was increased in both training groups compared to the control. Fibrinogen was decreased significantly in both training groups compared to the non-training control group. Conclusion: It was concluded that both submaximal aerobic and combined aerobic-resistance exercises, decrease coagulation system activity in young healthy sedentary men.