TweetI think if you inject into a muscle enough there will be some fascia stretching over time...i.e. if you used shoulders say Mon and Thur injection schedule and alternate everytime you will see some over a period. Also some scar tissue will buils up causing some growth or change in shape. I know this cause my left bicep has a slightly bigger pronounced peak that my right. This is due to frequent injections in teh past. Im not sure over time it will stay, but during cycles and doing spot injection (bis, tris, chest, delts) I have noticed some localized growth. Doubt it will stay there when not using them for a period of time...So I would say yes and no...lol