The effect of 8 weeks of circuit resistance training on serum levels of decorin and IGF-I in sedentary young men

Purpose Decorin is a new Myokine that effects of different exercise training on its levels is unknown. The aim of this study was to identify the effect of 8 weeks of circuit resistance training on serum levels of Decorin in young inactive males. Methods The 20 overweight young men randomly assigned in 2 groups ( n = 10) including control and circuit resistance training group. Circuit resistance training program conducted in 8 weeks and three sessions per week. Each training session consists of nine exercise that performed by 50 to 60 percent of 1RM. Before and after each exercise session, warm up and cooling down performed, respectively. Before (pre-test) and 48 h after last exercise training session (post-test), blood sampling performed to measurement of Decorin levels and data were analyzed by SPSS software and by using analysis of covariance test. Results Results indicated the significant increase of Decorin levels in trained groups compared to control group ( p < 0.05). However, there are no significant changes in serum levels of growth hormone and IGF-I levels in trained group than control group. Conclusion Present study findings indicated that circuit resistance training for 8 weeks could be associated with positive effects and according to present study results, some positive effect of this type of exercise can be attributed to up regulation of Decorin levels.