He 'muscled his way' through the crowd. [=he moved ahead by pushing and forcing people to move out of the way]
an athlete practicing to develop 'muscle memory' [=the ability to repeat a bodily movement exactly]
To clean that floor you have to 'put some muscle into' it. [=you have to make a forceful effort]
(..) Jackie met his demise. Last known photograph. Costello uses three key guys. That's Fitzy. Off-the-boat psycho, lives in Brockton with his mother. Delahunt, muscle. French, the number one. But of course, the rock star, you-know-who. We've done a briefing book, so read up. I want all ideas... (..)2006 The Departed