False. Exercising 2 to 4 hours before bed will actually interfere with your sleep cycles and make it harder to sleep. Fortunately, exercise in general is actually good for sleeping. Just make sure it’s well before bedtime. Aim for 30 minutes a day of activity (such as fast walking, dancing, biking, playing sports, or active games on your Wii, Xbox, or other game console). Exercise increases endorphins, which are our bodies’ natural feel-good chemicals. So get moving (just not too close to bedtime)!