How does resistance training influence metabolism?

Resistance training positively influences metabolism primarily by increasing resting metabolic rate through the development of greater muscle mass. When individuals engage in resistance training, they stimulate muscle hypertrophy, which refers to the growth of muscle fibers. Muscle tissue has a higher metabolic rate compared to fat tissue; therefore, an increase in muscle mass results in a greater overall caloric expenditure at rest. This elevated resting metabolic rate means that the body burns more calories throughout the day, even when not engaging in physical activities.

The other options don't align with the physiological effects of resistance training. The idea that resistance training decreases resting metabolic rate is incorrect, as muscle mass is critical for boosting metabolism. Stating it has no effect on metabolism overlooks the significant benefits associated with increased muscle mass. Lastly, while it is possible for individuals to experience changes in fat storage based on various factors, resistance training generally favors muscle growth and fat loss rather than increasing fat storage. Therefore, the statement that resistance training increases resting metabolic rate due to greater muscle mass is accurate and reflects the established understanding of how resistance training impacts metabolism.