The most weight that I have piggy backed is around 265 ish, but as far as a session goes, I would probably say that the maximum weight would be around 240. I know from experience that I can lift a 240 lb male for pretty much one full hour with very few breaks.
This is the stuff dreams are made of !!! I'm 133 lbs Rachel. How long could you piggyback ME for ? Hope you have a good weekend.