2 sentences

1. 在锻炼之前先热身，以避免受伤。

   zài duàn​liàn zhī​qián xiān rè shēn, yǐ bì​miǎn shòu shāng.

   Warm up before exercising to avoid injuries.

   Source: CCMatrix

2. 每次走路，在前五分钟慢慢走，准备热身。

   měi​cì zǒu lù, zài qián wǔ fēn​zhōng màn​màn zǒu, zhǔn​bèi rè shēn.

   Each time you walk, walk slowly for the first five minutes to warm up.

   Source: CCMatrix