I had been dilligently working on my turnover. Making sure I get those 180 plus foot falls a minute. The thing is, that it's a bit of work to move the legs like that. At least until I get used to it.
Anyways I've been slacking on it the past few weeks and today I got to experience the effects of over striding. Hip strain.
So I'm off the legs for a few days. We'll see how it goes.