I remain mystified at the range of difference in my experiences of running when I run the same mile every day. Why isn’t the experience more consistent? Of course, I’d love it if I were faster and could breathe more easily, if my knees didn’t wobble and my muscles stay tight, but honestly, it would be a more intelligible matter if at least if felt largely similar day-on-day. 5°, light breeze, 10:15.