He always begins his lessons with a warm-up exercise.

他讲课前总是先让学生做预备练习题。

《牛津词典》

If you give up exercise, your muscles shrink and fat increases. By the same token, if you expend more energy you will lose fat.

如果你放弃锻炼，肌肉就会萎缩，脂肪会增多。同样地，如果你消耗较多的体能，你就会减掉脂肪。

《柯林斯英汉双解大词典》

First let's do the warm-up exercise.

首先让我们做热身练习。

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Taking a warm bath or sitting by a fire or doing some exercise can also help the body warm up.

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If I go on doing this exercise again, and again, and again what am I going to end up with?

如果我不断重复这个过程呢,最后结果会是怎么样的

耶鲁公开课 - 博弈论课程节选

You're never cleaning up after yourself. You never exercise.

你从来不把自己收拾干净，你从来不做运动。

That's why 实战 - SpeakingMax英语口语达人

But Lord Kirkwood, who proposed the motion, said it was simply a "tidying up exercise".

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Staci Lambert-Westcott of Stephens City, Virginia, took up exercise and fitness to help manage the diabetes she was developing.

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But remember that these revisions are always to some extent a catch-up exercise.

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