If your job involves heavy labor, think about changing the kind of work you do.

It wasn't that setting the lines was particularly heavy labor.

For now, he definitely needed to get involved in some heavy physical labor.

It was going to be a lot of heavy labor.

In 1989 65% of Chinese had jobs that required heavy labor.

Won't be much use for heavy labor around here.

There's a few thousand jobs that don't require any kind of heavy labor.

Why is he being forced to do this heavy labor?

As the authors put it: people used to be paid to exercise, since most work involved heavy physical labor.

Yet it would be a very heavy labour to read one of these books right through.