The metabolic rate is crucial for weight management as it determines the number of calories the body burns at rest. A higher metabolic rate means more calories are expended throughout the day, which can facilitate weight loss or maintenance. Factors influencing metabolic rate include age, muscle mass, and hormonal levels. Regular exercise, particularly strength training, can boost metabolic rate by increasing muscle, which burns more calories compared to fat tissue. Understanding one's metabolic rate enables individuals to tailor their diet and exercise routines for optimal weight management.