Studies show that moderate exercise such as walking done just an hour per day significantly increases your longevity (and, hey, makes you feel better, too).
Exercise has had a Goldilocks problem, with experts debating just how much exercise is too little, too much or just the right amount to improve health and longevity. Two new, impressively large-scale studies provide some clarity, suggesting that the ideal dose of exercise for a long life is a bit more than many of us currently believe we should get, but less than many of us might expect. The studies also found that prolonged or intense exercise is unlikely to be harmful and could add years to people’s lives.
Source: The Right Dose of Exercise for a Longer Life – The New York Times