Weight training impacts metabolic rate by increasing muscle mass, which in turn raises the basal metabolic rate (BMR). As muscle burns more calories at rest than fat, adding muscle through resistance training helps the body utilize energy more efficiently. This increase in BMR can lead to weight loss and better weight management over time. Furthermore, weight training stimulates the post-exercise oxygen consumption, causing the body to burn additional calories even after the workout session ends. Overall, weight training is a vital component of an effective fitness routine.