I ran an hour at what I thought was a restful pace, but my splits were faster than I had expected. My first mile is usually 11:30 - 11:45. Maybe I'm getting stronger and can handle the 5 mile distance better than I have in the past.
My wakeup HR was 51, and I felt pretty good during my stretches before I left home. The temperature was in the high 30s (F) when I began the run. I ran in shorts and a T-shirt, and after the first mile, I was starting to sweat and felt fine.