Comparison of the Effect of Two Resistance and Functional Training on Myoestatin and Body Composition in Non-Active Men

Introduction: Changes in myostatin levels and modulation of body composition may help explain the adaptation of these variables in response to exercise. Therfor, The present study was conducted with the aim of comparing the effect of two methods of resistance training (RT) and functional training (FT) on the myoestatin and body composition in non-active men. Materials and Methods: In this semi-experimental study, with a pre-test-post-test and a control group, 45 non-active men in 2022 were selected and divaided into three groups randomly: FT (n= 15), RT (n= 15) and control (n= 15). Both training program was performed for 8 weeks, three sessions per week and 40 to 50 minutes each session for the experimental groups. Blood sampling for measurement myoestatin and measuring the percentage of body fat (BF%) and lean body mass (LBM) were done in two phases: pre-test (24 hours before the training) and post-test (48 hours after the last setion of the traning). The data were analyzed using the Covariance and Benferroni post hoc tests. Results: The results of study showed that both training methods had significant effects on decrising myoestatin and BF% and incrising LBM in non-active men (p=0.001). However, these changes of variables were higher in the FT group than in the RT group (p=0.027). The average level of myoestatin in the FT group in the pre-test and post-test was 74/66± 15/98 and 47/06± 13/24 respectively, this rate in the RT group in the pre-test and post-test was 73.73±15.68 and 59.40±14.37 respectively. Conclusion: These results show the effect of both training methods on decrising myoestatin and BF% and incrising LBM, although these changes were more in FT. Therefore, it is recommended; coaches, athletes and other officials involved in sports exercse use these training methods, especially FT for sports performance and improvement of body composition