Athletes must stay in shape.

运动员一定要保持体型。

Tom always goes jogging in the morning and he usually does push-ups too to stay in shape.

汤姆总是在早上慢跑，也经常做俯卧撑来保持身材。

Do you exercise to stay in shape?

你们为了保持体形而锻炼吗？

I've got to stay in shape, you known.

我要保持身体健康，你知道。

Do you know what I do to stay in shape?

你做什么来保持身形？你知道我是怎么保持身形的吗？