Coffee improves energy and mental performance.

咖啡能够提高我们的能量和精神表现。

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Any sleep disturbance will diminish mental performance.

任何的睡眠问题都会使精神减退。

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If you need peak mental performance, then stop drinking alcohol.

如果你想要有顶尖的精神表现，那么停止喝酒吧。

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For that reason, the researchers designed a study that examined results from a mental-performance test of older Asian adults.

VOA: special.2009.05.19

For this reason, the researchers designed a study that examined results from a mental-performance test of older Asian adults.

VOA: special.2010.06.01

This shrinkage, though universal, affects people's mental performance in very different ways.

ECONOMIST: The ageing brain

Recent studies conducted by scientists in Israel showed that even losing an hour of sleep a night can have a noticeable effect on a child's mental performance.

BBC: Children losing out on sleep

By injecting the genetically engineered hormone, antiaging doctors seek to restore growth-hormone levels to those seen in adults in their 30s, in the hopes of maintaining peak physical and mental performance.

FORBES: Sweet syringe of youth