My 2 mile run this morning was done with a certain amount of caution. Due to the stiffness in my lower back earlier in the week, I wasn't sure how much I could push. I started out quite slow, I was not sure exactly how slow since I didn't get a 1 mile split time.I tried to keep my shape as they say in English football terms and I felt my breathing was good. I ran twice yesterday as per my training schedule and was happy to run 15:51. The temperature was 30F (-1C) and I tend to run a little slower when it is cold.