Read the following passage and then choose the questions.
Nowadays, there are more and more dangerous diseases. As a result, it is very important to stay healthy. Firstly, you should have a balanced diet. For example, you had better eat more vegetables, fruits and avoid fast food. In addition, you should not drink coffee, beer or wine because they are very harmful. Secondly, doing exercise regularly is also a way to keep fit. For instance, you can play volleyball, walk or go swimming every morning. Moreover, doing exercise will help you become stronger, more active and prevent a lot of diseases. Last but not least, you should get enough sleep. Especially, do not go to bed late or watch TV overnight. In conclusion, there are many ways to stay healthy but the above ones are the most popular and easiest to follow.

What impact does regular exercise have on health?