How long after a BBL is it OK to put pressure on your butt? Is snow skiing 7 weeks after a BBL a bad idea?

I'm 2 weeks post op and my butt looks good but has been shrinking a lot. I only got 500 cc's per side and have not sat after sx. Please advise if it is safe to go skiing at 7 weeks after after bbl? You have to sit on the chair lift besides the risk of falling when skiing....is it too soon and my results can be compromised or is it safe after 7 weeks since the fat that 'took' should be there for good? Also, can pressure from a fall, create dents or irregularities at 7 weeks?