求why should we do exercise（锻炼）?的英语作文?

Are you in good health?Do you want to be in good health?If you are not,let me tell you how to do.
Excerising can make us strong.Besides this,it is also helpful for us to fight with deases and illness.Also,taking lots of exercieses can help us to keep fit especially for those girls who is crazy about beauty.What's more,during the exercise,we can have fun with our friends.At last and not at the least,we can also develop our friendship during having sports.