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Aug 2018
12:40pm, 31 Aug 2018
9,257 posts
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Garfield
I bought a new strap for my Fenix 5 and now it fits better - last time, the bar between the smallest and next to smallest hole broke, so the readings were sometimes out...including no reading at all!
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Aug 2018
3:44pm, 31 Aug 2018
26,952 posts
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SPR
While I'd normally agree that DCR's experience counts above normal users, but if lots of normal users are not getting correct stats then unless they can fix the issue then it doesn't matter if DCR gets good results. There's probably testers out there with different experiences to DCR as well.
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Aug 2018
4:00pm, 31 Aug 2018
1,346 posts
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J2R
SPR, I agree. An optical HR sensor may work perfectly on DCR's wrist but not on someone else's - it's not a question of his expertise or otherwise. My partner has a TomTom Runner 3 with optical HR, and it behaves much better on my wrist than hers (although it still misreads often).
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Aug 2018
4:03pm, 31 Aug 2018
5,469 posts
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larkim
Equally I'm sure fitbit are well aware of what is and what isn't a valid set of data and you'd expect them to sort out some of that noise. I've not used an optical sensor much, but I'd be very surprised if it gave, say, a consistent resting heart rate of 55 when it was actually 60, or 45 when it was actually 50. The issue that runners have with optical sensors are that they from time to time end up recording cadence instead, or not reading at all, but day to day use doesn't have the same shocks or changes in temperatures of the wrist etc, so I'd suspect for that sort of data readout they do give reasonably reliable output.
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Aug 2018
6:12pm, 31 Aug 2018
13,204 posts
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Chrisull
Hmm my optical HR starts off great and then drifts off, so as I'm slogging hard up a hill it sometimes shows my HR dropping to 120s even though I can feel it's not true and also my cadence remains high. Conversely it starts runs at 90-100 which is wrong as well, and then settles after a 100m. Neither time cadence is to blame. Sometimes it can be excellent. Sometimes not.
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Aug 2018
6:27pm, 31 Aug 2018
6,315 posts
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The_Saint
The problem with the average punter's experience over an experienced person who has used countless different devices and critically reviewed them is my experience with other runners coming to me usually just before a race with Garmin issues and in less than 10 seconds it is clear to me that they have not spent 5 minutes trying to read any instructions and only have the vaguest clue what the watch does.
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Aug 2018
6:32pm, 31 Aug 2018
1,347 posts
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J2R
The_Saint, you put a GPS watch on your wrist. If the heart rate doesn't read correctly, it's not because you haven't followed the instructions, and no great expertise isn't going to help. What more would you explain?
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Aug 2018
7:39pm, 31 Aug 2018
873 posts
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DavidFenlandRunner
Nice one, J2R. Technology, or should I say GOOD technology, just works.
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Aug 2018
8:01pm, 31 Aug 2018
5,470 posts
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larkim
How do you use an optical HRM? You just use an optical HRM!
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Aug 2018
8:14pm, 31 Aug 2018
37,718 posts
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GlennR
Well you might want to check the strap is tight enough. 
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