Effect of 8 Weeks Low and High Intensity Resistance Training on Leukocyte Count, Igg, Cortisol and Lactate Concentration in Untrained Men

The purpose of this study was to investigate the effect of 8 weeks resistance training with different intensity on leukocyte count, IgG, cortisol and lactate concentration in untrained men. 24 untrained male (aged 23.67±1.71 years; height 176.04±5.82 cm; weight 70.78±6.66 kg and body fat 15.82±2.47 percent) were selected and randomly divided into three groups: high-intensity (80%1RM)(n=8), low-intensity (50%1RM)(n=8) and control (n=8) groups. Resistance training program includes (bench press, military curl, arm curl, lat pull down, leg press and leg extension), with three sets and 7-8 repetitions in high-intensity group and 12-13 repetitions in low intensity group. Blood sampling were collected in pre-test, after 4th week and 8th week of training. Result showed that the leukocyte count and IgG concentration in 80%1RM (HI) group decreased significantly but Cortisol and Lactate concentration in HI group increased significantly. The leukocyte count and IgG concentration in 50%1RM (LI) group increased significantly but Cortisol concentration in LI group decreased significantly. According to our findings we concluded that HI resistance training lead to suppression of cellular immune system with decreased of leukocyte count and immunoglobulin G as one of the humeral immune parameters and increased cortisol concentrations.