strain **
mental strain
nervous strain

Even the best rookies have not had much experience with the mental strain of a 500-mile race.

What's more, he was under some kind of mental strain and almost in tears.

"It was just the mental strain of pitching with men on base all the time."

Add a few more, and I collapse from mental strain.

There had been a certain amount of physical activity, and some mental strain.

The game's mental strains have already begun, at least for the coaches.

It is the mental strain that tells in the end.

But the mental and physical strain on Jordan was heavy.

Undoubtedly, they had been under considerable mental strain for several hours.

One day, she will grow tired of the mental strain.