Blimey thank for all the replies! Apologies but I've not explained myself well enough from the outset, what I meant was that I'm wearing the oximeter while sleeping only. Why?: There is school of thought to say that when average resting pulse rate increases, the body is not well rested/the athlete i...

Hi, I've recently started using an oximeter (Contec CMS-50E) I don't have any conditions (apnea etc) I use the oximeter to record any elevation in average HR to monitor over-training for endurance sport. Having used the record function for a week or so I've noticed that my "Low Pulse Rate(bpm)" is.....