Rest is bringing my wakeup heart rate downI

I mentioned in my post yesterday that I had a great 100 minute run. I didn't check my wakeup heart rate before I ran, but I felt good before, during, and after the run. I checked my wakeup heart rate this morning, and it was 54. It has been close to 60, so 54 is a big drop. This illustrates the effect of good sleep at night and the use of wakeup heart rate as a check on ones physical condition.