他肌肉发达。

Tā jīròu fādá.

He’s very muscular.

你的肌肉线条很美啊！

Nǐ de jīròu xiàntiáo hěn měi a!

Your muscle definition looks great!

我今天想举重，举重对我的肌肉好。

Wǒ jīntiān xiǎng jǔzhòng, jǔzhòng duì wǒde jīròu hǎo.

I want to lift weights today. Weight lifting is good for my muscles.