根据医学研究，定期进行锻炼可以减轻压力。
According to medical research, doing exercise on a regular basis can release pressure.
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.
首先，根据医学研究表明，当我们运动的时候，我们的大脑会释放出某种化学物质，这将会让我们更加快乐、放松。
Firstly, according to medical research, when we exercise, our brains release certain chemical substances which bring feelings of happiness and relaxation.
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