What is the primary impact of resistance training on metabolic rate?

Resistance training primarily impacts metabolic rate by increasing resting metabolic rate (RMR). This occurs because building and maintaining muscle mass, which is stimulated through resistance training, requires more energy for maintenance compared to fat mass. Muscle tissue is metabolically active, meaning that a higher muscle mass can lead to a greater caloric expenditure even at rest.

The increase in RMR following a resistance training program is often attributed to the body’s need to repair and recover muscle fibers that have undergone stress and microtrauma during the workout. This recovery process also consumes calories, which adds to the overall energy expenditure. Over time, individuals who engage in regular resistance training can see a significant elevation in their RMR, contributing to better weight management and overall metabolic health.

This effect is long-lasting, as increased muscle mass can maintain a higher calorie-burning rate in the body. Understanding this relationship between resistance training and RMR is essential for those looking to optimize their fitness and body composition.