The Effect of Eccentric Resistance Training on Muscle Strength, aerobic capacity and Insulin-like Growth Factor-1 (IGF-1) in inactive Young Women

Data shows the positive effects of resistance training on increasing muscle mass, through hormones and increasing metabolic rate and protein synthesis. Therefore, the aim of this study was to investigate the effect of 10-week of eccentric resistance training on muscle strength , aerobic capacity and insulin-like growth factor 1 levels in inactive young women. 28 inactive young women with an average age of 24.75±4.58 and weight of 56.05±8.12 were randomly divided into two groups of eccentric resistance training (14 people) and control group (14 people). Then, the eccentric resistance training program was implemented in the training group for 10 weeks and 3 sessions per week. Blood sampling, muscle strength tests of upper and lower body organs, maximum oxygen consumption and body composition were performed before and after the intervention. The control group did not do any exercise program during the study period. Serum IGF-1 was measured using ELISA method. To analyze the data, parametric independent T and paired T tests were used and a significance level of less than 0.05 was considered. The results showed that eccentric resistance training for 10 weeks significantly increased upper (p=0.004) and lower (p=0) body muscle strength and lower body, aerobic capacity (p=0.001), lean mass (p=0.037) and serum IGF-1 (p = 0.026) in inactive young women. Inactive young women can use eccentric resistance exercises to increase muscle volume and muscle strength in their upper and lower body.