In the present study, we investigated about the influence of exercise training on plasma adipocytokine levels in seventeen young obese men (19.1±1.0yr, body weight: 92.6±12.7kg, BMI: 30.4±3.4, percent body fat: 26.5±3.5%). Subjects were separated into endurance training group (ET: n=8) and resistance training group (RT: n=9). The ET group performed an 8-week training program (3 times･w⁻¹, 30 min endurance exercise with treadmill or ergometer at ventilatory threshold [VT] intensity). The RT group performed resistance exercise 2 or 3 times･w⁻¹ for 5 months. Resistance training consisted of seven exercises and training resistance was approximately 80% of one-repetition maximum, and participants performed 3 sets for each exercise consisting of 10 repetitions. After intervention, body fat mass, and VT were significantly improved in the ET group. In addition to, plasma leptin levels were also lowered (7.5±2.7 vs. 6.0±2.4 ng/ml; p<0.05). The RT group showed significant reduction in body weight, BMI, percent body fat and body fat mass, and had significantly increased VT, VO₂max, power output and torque. But plasma leptin levels were not reduced. Although plasma adiponectin levels were unchanged in both groups (ET: 3.6±2.1 vs. 3.8±1.9 μg/ml, RT: 5.6±2.1 vs. 6.2±2.4 μg/ml), a significant negative correlation between delta plasma adiponectin levels and delta body weight (r=-0.672, p<0.01), BMI (r=-0.710, p<0.01), and body fat mass (r=- 0.565, p<0.05) was observed (n=17). Delta plasma leptin levels were not correlated with any variables. These findings suggest that the improvement of body composition is necessary to increase the plasma adiponectin levels in young obese men.

DESCENTE SPORTS SCIENCE Vol.26/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE