How does strength training affect metabolism?

Strength training has a significant impact on metabolism, primarily by increasing muscle mass. Muscle tissue is metabolically active, meaning it requires more energy to maintain compared to fat tissue. This increase in muscle mass from strength training elevates the resting metabolic rate (RMR), which is the amount of energy expended while at rest. Consequently, individuals with greater muscle mass will burn more calories even when they are not exercising.

Additionally, resistance training can lead to an increased energy expenditure in the hours following a workout due to the process of muscle repair and recovery, further enhancing metabolic activity. Over time, as muscle mass increases, the overall metabolism becomes more efficient, which can assist with weight management and fat loss. This mechanism highlights the importance of incorporating strength training into fitness routines not just for physical strength, but also for its metabolic benefits.