on the muscle

基本解释

Some people may pack on the muscle while others struggle to gain only a little bit.
有些人练习时，在别人再加一点都难以坚持时，他还在给肌肉施压。
A good rule of thumb: no stretching or hard work until tenderness (pain when you push on the muscle or joint) is gone.
一个很好的经验法则：除非压痛（当你压肌肉或关节）都不见了，否则不做伸展或艰难的动作。
Conclusion It is known that ligustrazine can expand blood vessels and agitate microcirculation, and this effect on the muscle spindle makes it helpful for persons with muscle atrophy.
结论川芎嗪是已知具有扩张血管、促进微循环的药物，其对肌梭的兴奋作用，使其有可能成为缓解失重性肌萎缩的候选药物。

For years, researchers blamed muscle tension from tightening in the face, neck and the skin on top of the head.
And then deliver those computer signals either to guide the computer cursor on the screen or onto robotic arm to move the arm or perhaps even muscle stimulators to re-animate the paralyzed arm.
然后传递这些计算机信号,操控电脑屏上的光标,或者机器人手臂来活动手臂,或者甚至可能肌肉刺激器来让瘫痪的手臂重新动起来。
斯坦福公开课 - 7个颠覆你思想的演讲课程节选
and some things on the bars over at Muscle Beach,
在肌肉海滩玩单双杠，
激情生活 - SpeakingMax英语口语达人

In the late 1800s English physiologist John Langley discovered the muscular nicotinic receptor when he tied a frog muscle to a round drum, put nicotine on the muscle and saw it contract.
FORBES: The Nicotine Cure