Pǎobù qián duō lāshēn xiǎotuǐ, kěyǐ jiǎnqīng gēnjiàn de fùdān.
Stretching your calves more before a run eases the load on your Achilles tendons.
Tips
memory
跟 "heel", as in 高跟鞋 high heels, + 腱 "tendon": the heel tendon, the thickest tendon in the body. A rupture is 跟腱断裂, a classic injury in basketball and badminton.