I'm able to do the same activities that I could before, just with some modifications. I still run, bike, go hiking and do yoga, I just don't go as far or as fast. Using my level of pain as a guide, I'm slowly trying to build up to how far I used to be able to go. I also have to be careful of timing, because after I do something like that I'm down and out for a few hours-I can't count on being able to do even simple tasks until I've rested for a couple hours. After I exercise, the nerves in my legs also fire like crazy which causes muscle twitching and discomfort; sometimes the twitching is so bad that my legs visibly shake and it's hard to stand. Even though in the short term it makes my symptoms noticeably worse, in the long term I believe it helps me; it's also the only effective way I've ever been able to manage my depression and anxiety, it keeps my knee problems from really bothering me, and being active is what I love so I'm going to do everything in my power to keep it up.