What effect does regular exercise have on resting metabolism?

Regular exercise has a significant impact on resting metabolism, primarily by increasing metabolic rate. Engaging in regular physical activity builds muscle mass, which is metabolically active tissue. Muscle burns more calories at rest compared to fat tissue, leading to an overall increase in the resting metabolic rate. Higher levels of physical activity can also enhance the efficiency of energy utilization in the body, further contributing to elevated calorie expenditure even when not exercising.

This increase in metabolism can continue even after workouts are completed, due to a phenomenon known as excess post-exercise oxygen consumption (EPOC), where the body continues to burn calories at an elevated rate as it recovers from the exertion. Thus, regular exercise positively influences metabolism through muscle development and improved energy dynamics.