I'm now 6 weeks post op, so still too early really.
I'm now doing basics like pouring a full kettle and slow washing up etc. I can still feel quite abit of pulling on the scar tissue however if attempting anything more exertive, this is very unnerving.
So I guess the answer is: no real heavy lifting just yet.
I can probably estimate that I pick up approx 5lbs in weight and then experience the muscles pulling which can then lead to tenderness.
SLOWLY, SLOWLY goes it.