Regular exercise is important for teenagers, not just for staying fit but also for mental well-being. Activities like running, swimming, or even walking help strengthen muscles, improve heart health, and reduce the risk of diseases. Exercise also releases endorphins—chemicals in the brain that make us feel happy. For teens, it can relieve stress from school, improve sleep, and boost self-confidence. Creating a daily habit of physical activity can lead to a healthier, happier life.