The aim of this study is to compare the acute effects of endurance exercise (EE), resistance exercise (RE), and concurrent exercise (CE) on immune and hormone changes in active men. One hundred thirty healthy young men (no history of special diseases, nonalcoholic and nonsmokers) as a research population, will perform two months regular physical activity (at least 2 days a week). So, as a active men, twenty one subject voluntarily will participate as a sample of this study and randomly will assign into three groups: endurance exercise (EE) (n=7), resistance exercise (RE) (n=7), and concurrent exercise (CE) (n=7). Four days before exercise session, anthropometric and body composition factors will measure and one-repetition maximum of RE and CE groups will calculate with Brzycki formula. Subjects will prohibit from any exercise activity three days before exercise session and will fast at least 12 hours before first sampling until last sampling (not eat any food). Special exercise protocol will perform consisted of 45 min for each group. Blood samples (4 cc) will obtain from antecubital vein before exercises, immediate and 1 hour post-exercises and will pour into free EDTA tubes. Fasting Blood Suger will determine by the enzymatic method and IL-17, IL-10, cortisol and testosterone will measure by ELISA method.