I tore my right medial meniscus about three weeks ago (we'll call it a sparring accident), and am currently waiting to figure out whether it needs to be scoped. I am finally at the point where I can walk up and down stairs without much pain, but I have limited range of motion in the knee and my lateral stability is suspect. I'm trying to figure out how to get some cardio in, given that I can't jog and have no access to a pool. Anyone have some bright ideas? I'm trying to do the best I can not to turn into a sofa slug in the next three weeks.