One knee, bothering me on hills (walking/hiking as well) and near the end of the run yesterday. It may twinge a bit when I bend at other times. Just sitting here, I note that something feels a bit "off" in that knee, but I wouldn't say pain, really. None of it is terrible.
The sensation is on the out side of the knee.
What do you think?
I'm going to take a break from running(obviously), but for how long? Days? weeks?

Do you guys think I can do a brisk walk on flat? I'm quite upset about the prospect of no cardio, and regular gym visits are not feasable.
Thoughts?