عنوان مقاله [English]
The aim of this study is to comparison of the effects of plyometric and resistance circuit training on body mass index and physical fitness of male teenage student volleyball players. Forty-two volleyball players (15-17 years old) were divided randomly into three groups of plyometric exercises training, resistance circuit training and control group that carried out regular exercise training. Before and after 6 weeks of training, agility, speed, maximum strength and explosive power of lower limbs and body mass index were measured t-test, one-way analysis of variance and Kruskal – Wallis test was used for analysis of data. The results of the t-test showed that both of experimental groups had significant difference in body weight, body mass index, lower limb explosive power and strength. But this difference was not significant in speed and agility. Compared between experimental groups and control group, one-way ANOVA test results showed that plyometric and resistance circuit training have a significant effect on explosive power and strength of the lower limb. But between the groups was not statistically significant difference in speed and agility variables. Plyometric and resistance circuit training improve body mass index, body weight, explosive power and strength of lower limb were young athletes. Of course, circuit resistance training had a greater impact on lower limb explosive power.