My knee feels fine today. I went out for a run and didn't have any trouble with it. Mummybot has bad knees so I am a bit wary of hurting mine. My quads are pretty fucked from just what I did. I'm feeling a lot better for getting back into it though. The feeling afterwards is wonderful and the urge to get your rest days done with so you can get in the gym is good. You really do need goals to be happy.