exercise做锻炼可数吗

exercise泛指“锻炼”时,做不可数名词；exercise表示“体操”或“练习（题）”时是可数名词。

Swimming is a good form of exercise.

游泳是很好的锻炼方式。

I should exercise more.

我应该多锻炼。

Running on the spot is good exercise.

原地跑步是一种很好的锻炼。

Diet and exercise are equally important.

饮食和锻炼同样重要。

You shouldn\'t exercise on a full stomach.

你不应该吃饱了就运动。

Diet and exercise are obviously important.

显然，饮食和运动是重要的。