How much is enough?

Doing 30 minutes or more of exercise a day for three to five days a week may significantly improve depression or anxiety symptoms. But smaller amounts of physical activity — as little as 10 to 15 minutes at a time — may make a difference. It may take less time exercising to improve your mood when you do more-vigorous activities, such as running or bicycling.

The mental health benefits of exercise and physical activity may last only if you stick with it over the long term — another good reason to focus on finding activities that you enjoy.