Why exercise?

1. READ/play the text
2. CLICK the picture (and video)
3. TRY this:

Q1: What is an example of part of the body that needs exercise if it is to work well?

[Answer]

You might think that the less work we do, the slower our bodies will wear out and the longer we might live.

In fact it is the exact opposite. Many things in our bodies, from bones to heart, need strong exercise to stay healthy.

So we can't afford not to exercise if we want to live to a ripe old age.