I waited a full 6 weeks, and even then I took it slow and easy until about 8 weeks post-op. Even now, 10 weeks post-op, I'm working through the stiffness of having kept my arms down for so long, and of course my upper body muscles are so weak from lack of use. But that paid off, my scars have minimal stretching, and I'll be able to recondition my muscles in no time.