I wanna go mountain biking but my right leg doesn't like weight bearing when i get out of the saddle

*sniff* *sniff* snork bewwaaaaaaaa... poooooo..

My mountain bike misses me & i miss it

I might have a solution to this though...I'm pondering the idea of going to visit a gym & use a stationery bike to work on jumping out of the saddle. Physio said that might be worth a shot..He's as confused as I am about how to solve this conundrum.