Exercise also releases, 'feel good' chemicals called endorphins and most people feel better, more positive, and more energetic following exercise. Even people who say they feel 'too tired to go to the gym' will often feel much more awake and energised if they do manage to get there.
Still not convinced? Exercise is good for your mind as well as your body. Research shows that people who engage in regular exercise are much less likely to suffer from depression and other mental health issues than people who don't take regular exercise.
The most important thing with regard to exercise is to find something you enjoy. There are so many different types of exercise to choose from these days.