首先，根据医学研究，当我们运动的时候，我们的大脑会分泌出一种化学物质，这种物质会让人感觉愉悦和放松。

Firstly, According to medical research, while we exercise, our brains will release some chemical substances. Such substance will make people feel pleasure and relaxation.

youdao

首先，根据医学研究，当我们运动的时候，我们的大脑会分泌出一种化学物质，这种物质会让人感觉愉悦和放松。

Firstly, According to medical research, while we exercise, our brains will release some chemical substances. Such substance will make people feel pleasure and relaxation.

youdao