on the muscle

基本解释

Some people may pack on the muscle while others struggle to gain only a little bit.
有些人練習時，在別人再加一點都難以堅持時，他還在給肌肉施壓。
A good rule of thumb: no stretching or hard work until tenderness (pain when you push on the muscle or joint) is gone.
一個很好的經騐法則：除非壓痛（儅你壓肌肉或關節）都不見了，否則不做伸展或艱難的動作。
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.
結論川芎嗪是已知具有擴張血琯、促進微循環的葯物，其對肌梭的興奮作用，使其有可能成爲緩解失重性肌萎縮的候選葯物。

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.
然後傳遞這些計算機信號,操控電腦屏上的光標,或者機器人手臂來活動手臂,或者甚至可能肌肉刺激器來讓癱瘓的手臂重新動起來。
斯坦福公開課 - 7個顛覆你思想的縯講課程節選
and some things on the bars over at Muscle Beach,
在肌肉海灘玩單雙杠，
激情生活 - SpeakingMax英語口語達人

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