When you are used to physical Labour, you feel uncomfortable if you're idle.

劳动惯了，闲着就不舒服。

We often take part in physical Labour.

我们经常参加体力劳动。

He can't bear the heavy physical Labour.

他无法忍受农村那繁重的体力劳动。

She takes an active part in physical Labour.

她积极参加体力劳动。

We should often take part in physical Labour.

我们应该经常参加体力劳动。