Nowadays,more and more people know the importance of keeping healthy.Without a healthy body,they can do nothing.For me,there are three main ways to keep healthy.First,it is necessary to keep a balanced diet,which is the basis of good health.It is better for us to have more fruit and vegetables every day.Secondly,it is important to take regular exercises,such as swimming,jogging and so on.Thirdly,it is essential to stay in a good mood.If people follow these three ways of keeping fit,they'll greatly improve their health.