There are so many reasons to exercise. One of the most important is that exercise helps you lose weight. That helps you feel better about yourself. Exercise also firms up your muscles. You breathe easier. You relax and reduce stress. Exercise takes many forms. Some forms are outdoors, like walking in a park. Other forms are indoors, such as taking a martial arts class. And exercise doesn't just give you a healthier body. It also gives you a better brain! That's because exercise sends more oxygen to your brain. This perks you up and helps you think better. You'll be able to focus at school and enjoy your life more.