和一个朋友在场上打打球会使你得到锻炼的。

You can get some exercise by knocking a ball about a field with a friend.

youdao

当你在水上玩耍的过程中，其实你正在消耗你的卡路里并得到好的锻炼，相信我：和孩子们玩耍会使你筋疲力尽的！ ！

When you are happy and playing in the water you are burning calories and getting a good workout, believe me you will tire out before the kids do!

youdao