So I can't run seriously anymore due to knee injuries. It's not really an option. I'm sure there are others out there who were in a similar situation. Just curious what sport you moved onto? I've been doing alot of low impact cardio work at the gym but it's nowhere near the satisfaction that running brings. Mainly, I miss the training and being outside. I tried swimming for awhile but find it to be depressing. Rock climbing was another option to consider but falling to the ground even if in a gym wouldn't be good for the knees. Alot of ex runners post about going into lifting weights to build up some muscle but I'm not into that. Options anyone?