Weight training influences metabolism by increasing muscle mass, which enhances the body's basal metabolic rate (BMR). A higher BMR means the body burns more calories at rest. Resistance training stimulates the production of muscle fibers, leading to improved strength and muscle tone. Additionally, the afterburn effect, known as excess post-exercise oxygen consumption (EPOC), means calories continue to be burned even after the workout has ended. This metabolic boost supports weight management and overall health.