muscle

Lifting weights at the gym is an effective way to build muscle mass and strength.

(Chinese) 在健身房举重是增加肌肉量和力量的有效方法。

He pulled a muscle in his leg while sprinting during the final lap of the race.

(Chinese) 他在比赛最后一圈冲刺时拉伤了腿部肌肉。