Quote:
Originally Posted by ///d
I think it has to do with heart rate. While sleeping our heart rate is quite low, even the slightest alertness raises it.
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If I had one of those watches, mine would be confused. I have clocked a resting heart rate of 54 bpm before. LOL. My buddy asked me..bro are you fucking dead!? LOL He couldn't get anything less than 70 IIRC