If it's really cold outside, you might even try a quick shower to get you warm before you do exercise.

如果外面真的很冷，你甚至可以试着在运动前快速冲个澡让自己暖和起来。

youdao

youdao

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》

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

VOA: special.2009.12.30

So the advice we give to all pregnant women during pregnancy is to try and avoid getting too hot, whether it's just during exercise or swimming in a warm pool.

BBC: Exercising during pregnancy

It is alright when it is warm, but gives your gums a good exercise when cold.

NPR: Discovering Afghan Cuisine, a World Away

The colors make the space exuberant, the bamboo makes it warm, and together they make the building as much an exercise in sensuous comfort as in structural bravado although the swaggering structure is there, too, replete with glass and natural light and a sense of grand space everywhere.

NEWYORKER: Situation Terminal