Paul have you heard of any athletes using to stem cells to recover from minor injuries that change the shape of the muscle? Or perhaps even a more significant one like your pec tear? Have those injuries allowed the muscle to return to its previous shape after the injury?
Change in shape could be swelling. Have you consider PRP, very effective in soft tissues injuries.
These are real injuries, some are older, the shape isn’t coming back on its own.
Actually I have. I know one guy with a serious knee injury that did stem cell injection to no avail. I think we’re still super early in understanding how we can use stem cells to promote healing and recovery.