My wakeup heart rate this morning was 53. That is a good sign, because it illustrates the effect of sufficient sleep at night. When I get insufficient sleep, my wakeup heart rate is higher, typically 60 or above. In addition, with insufficient sleep, my heart skips a beat every so often. With sufficient sleep, my wakeup heart rate is lower and my heart doesn't skip beats. In addition, with sufficient sleep at night, I feel stronger, have more endurance, and really enjoy my running. In this mortal life, sleep rules!!