Muscle mass significantly influences metabolic rate, as muscle tissue requires more energy to maintain compared to fat tissue. An increase in muscle mass can elevate the basal metabolic rate (BMR), leading to higher overall energy expenditure, even at rest. Resistance training is particularly effective for building muscle and consequently boosting metabolism. Additionally, engaging in activities that promote muscle growth can help offset age-related declines in muscle mass, maintaining a healthy metabolic rate throughout life. Thus, prioritizing muscle-building exercises is essential for metabolic health.