Visfatin, insulin and insulin resistance response to two methods of exercise order in overweight men

The present study aimed to examine the influence of acute resistance exercise order on visfatin and insulin hormones and insulin resistance index in overweight men. 15 young men (mean age: 21.3 ± 1.2 years and BMI: 27.9 ± 1.8 kg/m2) were selected purposefully and to be completed two sessions of resistance exercises. Subjects performed two different resistance protocols with %85 of a repetition maximum (1RM) [protocol A: from large to small muscles (leg press, bench press, lat pull-down, overhead press, biceps curl, triceps extension) and protocol B: from small to large muscles (reverse sequence of protocol A)]. For this purpose in the first session randomly seven of the subjects performed protocol A and the eight subjects completed the protocol B. 1 and 2 min rest intervals was set between sets and exercises, respectively. 1 week later, the second session of resistance exercise was conducted with the as the first session but the resistance activities for subjects A and B were displaced. Blood samples were collected before the exercise, immediately and 30 minutes after exercise at each session. By using repeated measure the results indicated that serum visfatin concentrations in A (p>0.05) and B (p<0.05) protocols, increased immediately after exercise. In addition, the insulin concentration and insulin resistance in both protocol increased significantly immediately (p<0.05) and 30 minutes (p<0.05) after exercise. Overall findings showed that, large or small muscles used at the beginning of the exercise do not affect the secretion hormone visfatin and other mentioned factors.