Building muscle mass impacts metabolism by increasing the body’s basal metabolic rate (BMR). Muscle tissue burns more calories at rest compared to fat tissue, leading to enhanced overall calorie expenditure. As one engages in resistance training, the body requires additional energy for muscle growth and maintenance. This boost in metabolism can aid in weight management and reduce fat accumulation. Consequently, increased muscle mass not only improves strength but also raises the number of calories burned throughout the day, facilitating healthier body composition.