How much physical(身体的)activity do you do? In the past, your grandparents walked miles to school or to work. They cut wood, carried water or heavy things, washed clothes, worked in the fields, etc. Now we have washing machines, cars and buses. Most of us don't grow vegetables, and parents usually drive their kids wherever they want to go. But your body was designed(被设计)for physical activity, and without enough exercise it starts to slow down and become unhealthy. There are some ways to do physical activity for free.
Climb stairs instead of(而不是)using lifts.
Walk or ride your bike to school(Don't ask your mum or dad to drive you to school).
Play games after class or after school.
Practise skills like running, catching, throwing，kicking, hitting，or bouncing a ball.
Walk when you talk with a friend, instead of sitting down talking.
Walk or run with the dog(If you haven't got one, borrow one from a neighbour).
Make and fly a kite.
What other ideas can you come up with? You can do a lot of these things by yourself. There are lots of other things that you can do. They may cost some money, and you will have to keep that time free.
