exercise既是可数名词，同时也是不可数名词。

exercise泛指“锻炼”时，做不可数名词，如：take exercise锻炼身体、take more exercise多锻炼；

exercise表示“体操”或“练习（题）”时是可数名词，要用复数形式。

扩展资料

如：do morning exercises 做早操；

do eye exercises 做眼保健操；

do English exercises 做英语练习。

例句：

For maximum effect do the exercises every day.

每天锻炼以取得最佳效果。

He was a man who exercised considerable influence over people.

他是个对别人有相当影响的人。

Regular exercise has a direct bearing on fitness and health.

经常性锻炼对于身体健康有直接影响。