Today was a wonderful speed run

I felt great during my 5-mile run this morning. The temperature was about 10 degrees (F) cooler than it has been. My wakeup HR was 50. I felt great and had a lot more endurance than I've had during the past couple of weeks. I was out an hour earlier than I've been getting out, and I enjoyed seeing ducks swimming in the river. When I left home, the shade temperature was in the mid 60s, and it was 78 when I returned.