Nowadays more and more people are concerned about their health.But how to keephealthy?Different people may give different answers to this question.In my opinion,it is essential to do the following.First,it is absolutely necessary to take some exercise every day.Research shows that getting plenty of exercise make the heart beat faster and the lungs work harder.This strengthens the heart,reduces the chance of heart attack,and helps lower blood pressure.That's why more and more people are becoming active in various kinds of sports and exercises.