What effect does strength training have on metabolic rate?

Strength training has a significant impact on metabolic rate primarily by increasing muscle mass, which in turn raises the resting metabolic rate. Muscle tissue requires more energy to maintain than fat tissue, meaning that individuals with greater muscle mass will burn more calories at rest. This process enhances overall metabolic function, making it easier to maintain a healthy weight or even lose weight as muscle mass increases.

When strength training is incorporated into a fitness routine, the physiological adaptations include muscle hypertrophy (growth) and improvements in neuromuscular efficiency. Both of these adaptations contribute to increased energy expenditure even when the body is at rest. This effect can lead to a higher basal metabolic rate (BMR), which is essential for long-term weight management and metabolic health.

The other options fail to recognize the metabolic benefits of strength training. For example, stating that strength training decreases resting metabolic rate overlooks the fundamental principle that muscle mass enhances energy expenditure. Similarly, the notion that strength training has no effect ignores the comprehensive metabolic changes that accompany increased muscle mass. Lastly, suggesting it solely focuses on body endurance does not account for the primary goal of strength training, which is to increase muscular strength and size, rather than solely enhancing endurance.