Comparison of Complex Versus Contrast Training on Steroid Hormones and Sports Performance in Male Soccer Players

Abstract Objective The purpose of this study was to compare the effects of a complex versus a contrast training regimen with steroid hormones and the performance of soccer players. Methods Thirty-six professional male soccer players were randomly divided into 3 equal groups: complex training (n = 12; body mass index [BMI], 22.95 ± 1.76 kg/m 2 ), contrast training (n = 12; BMI, 22.05 ± 2.03 kg/m 2 ), and control (n = 12; BMI, 22.27 ± 1.44 kg/m 2 ). Players from the complex and contrast groups were trained for 6 weeks (3 d/wk). The complex group performed 4 different exercises, each composed of strength (80% of 1 repetition maximum [RM]) and power components alternately. The contrast group performed the same strengthening exercises alternately at different intensities (40% and 80% of 1 RM). All players were tested for free testosterone, cortisol, vertical jump, 20-m sprint, and agility T-test at the baseline and after 6 weeks of training. Results A 3 × 2 mixed analysis of variance revealed a significant difference in time effect ( P ≤ .05), whereas a nonsignificant difference was found in the group effect for all outcome variables. group × time interaction was significant in all the variables ( P P = .28). Conclusion Complex training showed greater improvement in physical performance and free testosterone concentration compared with contrast training, whereas both types of training decreased cortisol concentration in a similar fashion.