2 sentences for 筋 (jīn — muscle)

1. 我的手开始抽筋了。

   wǒ​de shǒu kāi​shǐ chōu jīn le.

   My hand's starting to cramp up.

   Source: AI Challenger 2017

2. 混凝土和大理石地板，以及其他坚硬的表面，会导致你的脚抽筋。

   hùn​níng​tǔ hé dà​lǐ​shí dì​bǎn, yǐ​jí qí​tā jiān​yìng de biǎo​miàn, huì dǎo​zhì nǐ de jiǎo chōu jīn.

   Concrete and marble floors, as well as other hard surfaces, can cause your feet to cramp.

   Source: CCMatrix