To reduce or avoid it, researchers have examined the effect of smoking,diet, brain-challenging games, exercise and other strategies.

VOA: standard.2010.06.17

So I need to do something intelligent to exercise my brain.

所以我得做点开动脑筋的事情让大脑也得到锻炼。

I feel like 实战 - SpeakingMax英语口语达人

When you touch boiling water, for example,get a cut, or even exercise too much, a special receptor on the neuron is activated, sending a signal to the brain - that hurts!.

VOA: standard.2010.05.04