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Resting Heart Rate Differs Garmin Connect vs Mobile App vs 735xt

Hi,

I've been using my new 735xt 24x7 for over a week (love it). I've noticed that the resting heart rate numbers reported on GC web versus the mobile app versus the 735xt itself are all different, quite substantially.

For example, here's a snapshot of the last five days. My normal resting heart rate is typically in the mid-40s.

Date -> GC Web, GC Mobile, 735XT history graph
6/10 -> 51, 39, 55
6/11 -> 50, 33, 49
6/12 -> 51, 39, 52
6/13 -> 51, 38, 48
6/14 -> 51, 44 50

Is anybody else noticing this? I don't know what to make of it or which numbers to trust.

Thanks,
Don