Maybe I'm recalling the wrong term because a forum search for "shearing" doesn't turn up much. But I thought that I read that people who got a pec minor tenotomy had problems later with surrounding muscles being overstrained as they pick up the slack. You'll have to search the forums and google for "pec minor tenotomy" and maybe some other terms to find out more. I haven't had one and don't know much about them.

I have had problems with my pec minor on my left being unusually tight. I've been stretching that sucker for 4 months and it's improved, but needs more.