Here is my little story about how much how soon! about two weeks after my RRP I went in for a cystogram (if I am remembering correctly) which is where they fill your bladder with a solution to check for leaks before the cathiter is removed. Anyway, I was situated where I could see the screen the radiologist was looking at. I saw all these black jagged lines and asked what that was? She said "those are all the stitches". Seeing that made a believer out of me. I did nothing for 6 weeks.
I would listen to your doctor and your body and take it easy for a while,
Good Luck, KW