When you have finished a long day at school, don't just crawl into bed, do some exercise and feel good.
Choose a sport which you find fun, some of the benefits of football are muscle and bone strengthening and the impact it has on your fitness.
Going to the gym may not be possible at the moment but it is a good way to build muscle and incorporate some cardio, which is good for fat loss.
Swimming is another option, it builds endurance, muscle strength and cardiovascular fitness.
Or, basketball helps coordination skills, and helps with your aim and fitness- there is a lot of sprinting and chasing
So, before you climb into bed, think about all of the benefits that sport can bring. Also, when you exercise, your body releases chemicals called endorphins. The endorphins react with the receptors in the brain and reduce your perception of pain and makes you feel good.