My wakeup HR was 52 again this morning. Another sign that my body handled the 8 miles on Wednesday.
I had good running for 3+ months last fall from September to December, giving a good peak to my running. Then I pushed myself to too much distance in December and caught a bad cold. Then I had my gall bladder removed and a stomach flu. My body seems to have had a good recovery from all of this, and last week and this week have been good running and my pulse rate has stayed low. Tomorrow will be the "big test" :)
Here is a link if you want to read about peaks.