The mental exertion had taken a lot out of him, and for very little gain.

Notwithstanding every mental exertion the task was a severe one.

The Saudi major was at the point of collapse, the physical and mental exertions like nothing he'd ever known.

Early morning was the only time for physical as we; as mental exertion.

His wide mouth grimaces at the physical and mental exertions.

They also suggested that mental exertion would make them unfit for physical labor.

That little bit of extra mental exertion was enough to eliminate hypocrisy.

You rely on what you already know so it's hard to make the mental exertion to learn.

The mental exertion is just incredible,'' Bernstein said hours after crossing the finish line.

It was chore that pleased him, requiring little physical or mental exertion.

The books taken together are evidence of mental exertions unimaginable in any other contemporary politician.

Moderate to severe symptoms following physical or mental exertion.

Once a child has been symptom-free for several days, I develop a plan with the family to gradually increase both physical activity and mental exertion.

The analysis of a book is a matter of time and of mental exertion.

This led to investigations into telekinesis, or the movement of physical objects through mental exertions.

And as for thinking, thinking isn't necessarily mental exertion.

Assists in times of physical and mental exertion, general fatigue and stress.

These symptoms can be extreme and are often worsened by trivial physical or mental exertion.

Through great mental exertion, Hydro-Man can also turn into steam.

For his mental exertions, Kreskin, 70, said he would accept a salary of one dollar a year.

This element measures the mental exertion required to cope with psychologically demanding work.

There are moments in the fortune of states when particular men are called to make improvements by great mental exertion.

Through sheer mental exertion Eberly endured the hours of weightlessness.

One surprise was the mental exertion required.

Beads of sweat formed on his brow in response to his mental exertions.