Resistance training impacts body composition by increasing lean muscle mass and decreasing body fat percentage. This type of exercise stimulates muscle hypertrophy and improves metabolism, as muscles require more energy to maintain than fat. Consequently, individuals may experience an increase in resting metabolic rate, aiding in weight management. Additionally, resistance training can improve bone density and strengthen connective tissues, reducing the risk of injury while enhancing overall physical strength. Combining resistance training with proper nutrition fosters optimal results in body composition changes, contributing to improved athletic performance and physical health.