What is the real benefit of rotating sites (ie quads, glutes, delts, etc) aside from the obvious fact that the area needs healing time and you don't want scar tissue to build up etc . . . I was always under the impression that an injection site wasn't necessarily affected more growth wise due to the fact that the injection has a systemic effect . Is this correct? Will injecting delts cause them to grow more so than just injecting glutes?

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