running with 'dead legs'

My legs are trashed. I ran this evening at Fort Ben State Park, really just wanting to get out and go nice and easy. As soon as I started I could tell my legs were needing some rest, so I took it "extra" easy. It wasn't nearly as humid or hot as it had been, but not by much - I had plenty of sweat pouring off of me. My splits were surprisingly faster than I expected or wanted... Mile 1: 9:47/mile Mile 2: 8:50/mile Mile 3: 8:36/mile Oops...I am taking it easy tomorrow. Looking forward to this weekend's 13 miler...