You actually use energy when you laugh, you move your diaphragm, you expand your lungs, and both those things can be helpful.

在大笑时都会用力，肺部隔膜移动可以帮助扩大肺腔，这是有益健康的。

youdao

You actually use energy when you laugh, you move your diaphragm, you expand your lungs, and both those things can be helpful.

在大笑时都会用力，肺部隔膜移动可以帮助扩大肺腔，这是有益健康的。

youdao