I'm very impressed, your heart rate at the end of a workout is 54. You must be in really good shape!
Ha! Thank you, but it could be related to the wonky wrist HR unit and/or total lack of exertion. ;-). I don't believe it was working correctly today since the last couple of walks never exceeded 89, and I was breathing hard going up the hill.
Anyway, I am working on getting in shape. :)