Nowadays,people always have many kinds of illness.Why？There are two reasons.One of them is:people usually eat junk food like fried food, poor food and so on.Second,people are more and more lazy.When people go out,they go by car or taxi.People hardly ever go out on foot.And how to keep healthy?What can we do?Doctor Swim tell you the best way，take more exercise！We will not go on a diet to maintain health.First,we should make a plan,give a goal yourself.Then,you should look for some best sports for you.Next,carry out your plan, for your goal！At last,you must remember this:persevere！Do you know how to keep healthy know？Go for it！