Final answer:
Exercise has numerous benefits like maintaining muscle mass, improving sleep, and aiding in weight management, but increased academic performance is not a direct benefit, although indirect effects might help.
Step-by-step explanation:
The benefits of exercise include a wide range of physical and mental health improvements. Some of these benefits are the maintenance of muscle mass, improved quality of sleep, and effective weight management. Regular physical activity contributes to better cardiovascular and muscular fitness, increases bone density and strength, improves cognitive function, and assists in weight loss and maintenance. Furthermore, it enhances mental health by reducing stress, improving body image, and promoting positive self-esteem. However, increased academic performance is not a direct benefit of exercise, although some indirect effects like improved cognitive function and better sleep could potentially contribute to better academic outcomes.