4 Ways Exercise Helps Fight Aging Read full article Credit - Bethan Mooney for TIME Everyone knows that exercise is good for you. But it’s not just beneficial for the young, healthy and already fit. It’s also one of the best defenses against the toughest aspects of aging. Exercise not only improves heart and lung health, but research shows that even modest physical activity is good for the brain, bones, muscles and mood. Numerous studies have found that lifelong exercise may keep people healthier for longer; delay the onset of 40 chronic conditions or diseases; stave off cognitive decline; reduce the risk of falls; alleviate depression, stress and anxiety; and may even help people live longer.