I'm another freak.... my resting HR in the AM is usually around 58-63. I would think it would be lower with 25 years of aerobic exercise! It stays around 66-72 during the day if I am sedentary, but goes up to 80-90 pretty quickly when I start moving around. It also goes down quickly when I sit. I stopped wearing my hr monitor while riding because I know my hr is always high for the first 30 minutes I ride. Then it settles in at around 75-80 % unless I am climbing. This bothered me until I realized it's just my pattern. It's always the same. But I still get the "lowHR" comments from my physicians, or mostly the nurses who think a hr in the 60's is low.