"The physical and mental fatigue are fighting each other at the same time."

A schedule is maintained that causes physical and mental fatigue.

So call it a combination of mental and physical fatigue.

This was the physical fatigue that came after a long, arduous journey and little sleep.

At times, early on especially, they allowed the physical fatigue to affect them mentally, so their execution stopped.

Every mental effort was, however, succeeded by great physical fatigue.

Sailors had terrible working conditions with low wages, no rest, and great physical fatigue.

Mental and physical fatigue increase with the setting of the sun.

It was not physical fatigue, but rather the rush of experience.

The film follows their physical and mental fatigue as the days pass and they try to get home again.