One is a true test of endurance, in which only those with exceptional physical and mental stamina will make it to the end.

Just practicing it takes tremendous mental and physical stamina.

"I started working out for conditioning in law school, to improve my mental and physical stamina, and never stopped training," she said.

"Complex procedures are long and require considerable physical and mental stamina."

But we think of it as a public service, to improve the mental stamina and subtlety of America.

Tyson still has his knockout punch but hasn't shown the mental stamina he might need in order to land it.

It's whether or not I have the stamina, both mental and physical.

But this competition looks at mental stamina as well as physical.

But he pointed out that it required both physical and mental stamina to play 100 games a week, as he does.

Fortifying one's mental stamina with drugs of various kinds has a long history.