Many people shy away from exercise because they think it will leave them tired and out of breath. But as you gradually progress to being more active, just the opposite happens: you’ll feel more energized and empowered. Keeping active might also make you happier. Regular aerobic exercise can help stimulate production of endorphins, “feel-good” chemicals in the brain. It can also help you get a good night’s sleep—people who exercise regularly tend to fall asleep quicker and stay asleep longer.