我同意丽丽的想法，我也觉得你一个星期至少运动三次。每次至少30分钟。

Wǒ tóngyì Lìli de xiǎngfǎ, wǒ yě juéde nǐ yí gè xīngqī zhìshǎo yùndòng sāncì. Měicì zhìshǎo sānshí fēnzhōng.

I agree with Lili's opinion; I think each week you (should) work out at least 3 times, for 30 minutes each time.