Sorry you got injured. I hope you heal quickly! At the end of September last year I tore my knee MCL when I was at the height of my fitness for hiking, scrambling, and climbing.  I didn't want to lose all of my fitness so I bought a pull up bar and started working on the upper body and core. As soon as I felt better walking, I started going to the indoor climbing gyms which was not too bad because I had to think of some clever ways to not bend or extend my knee.  Eventualy I did some very slowwwww hiking with poles and avoided any sort of knee twisting and extension. My knee is much better now and my rock climbing, although still a little clunky, continues to improve. My stubborness to keep my knee moving in a safe manner has also paid off as I just summitted Mount Baker the other weekend. Good luck and be smart about your injury. ... View more