How does physical activity affect your metabolism?

Physical activity has a well-documented effect on metabolism, specifically by increasing the rate at which the body burns calories. When engaging in physical exercise, the body requires more energy, which leads to an uptick in metabolic processes. This occurs both during and after exercise, a phenomenon often referred to as excess post-exercise oxygen consumption (EPOC).

During physical activity, skeletal muscles use energy, primarily from carbohydrates and fats. The body responds to this demand by accelerating metabolic reactions to produce the necessary energy. Furthermore, regular physical activity can enhance muscle mass; since muscle tissue burns more calories at rest than fat tissue, this leads to improved metabolic efficiency even when not exercising.

In contrast, other options suggest that physical activity either slows down metabolism, has no impact, or makes it erratic, which runs contrary to the substantial evidence supporting the idea that exercise promotes a healthier and faster metabolic rate. Engaging regularly in exercise, therefore, not only helps in burning calories during the workout itself but also boosts overall metabolic function over time.