Effects of Moderate Intensity Circuit Resistance Training on Resting Metabolic Rate and Body Composition in Young Adults

Abstract

Resistance exercises are commonly used by sportsmen and trainers to increase strength, muscle mass, and fat-free mass. The aim of this study is to investigate the effects of moderate-intensity circuit resistance training on resting metabolic rate and body composition. 16 moderately active male subjects were voluntarily participated in this study and the subjects were randomly assigned into either training (n=8, 25.1±1.3 years) or control (n=8, 24.8±1.4 years) group. The moderate-intensity circuit resistance training group followed a 12-week exercise program while the control group had no resistance training. The subjects’ resting metabolic rates and body composition assessments were performed at the beginning of the study and at the end of the 12-week training period as pre- and post-tests. Statistical analyses conducted by using paired samples t-test showed that there were no significant differences (p>.05) in the resting metabolic rates, heart rates and respiratory exchange ratios between the training and control groups. At the end of the 12-week training period there was a significant increase (p<.05) in fat-free mass (2.5%) and a significant decrease (p<.05) in fat mass (-8.5%) and body fat percentage (-8.9%) of the training group. No significant differences were observed in the control group. Bone mineral density and body weight values were not statistically different in any group, either. The results showed that the 12-week moderate-intensity circuit strength training had no significant effect on resting metabolic rate but body composition values of the training group were improved. 

Keywords

• Indirect calorimeter,DXA,bone mineral density,heart rate

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