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23 Jul
12:46am, 23 Jul 2024
27,910 posts
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Dvorak
Bit late to this discussion, but my 5K and 10K predictions are around 4:30/9:00 faster than anything I've run recently. I think the VO2 max figure is a bit optimistic, although the current FE figure is only one less.
On another metric, my stress reading was zero a few minutes ago. Anyone else get that?
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23 Jul
9:55am, 23 Jul 2024
19,736 posts
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Gooner
My body battery has regularly gone down that low, but never my stress 🙈😂
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23 Jul
10:42am, 23 Jul 2024
32,685 posts
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Rosehip
my stress reading feels completely random - playing computer scrabble seems to send it very high. It does go down to zero sometimes.
I had a couple of very odd dreams last night and woke from each feeling quite stressed. Garmin says I have good restorative sleep with lots of REM and should feel good today. I feel crap.
Usually feel much better when it tells me sleep was poor quality.
Think I should turn the sleep metrics off.
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23 Jul
2:01pm, 23 Jul 2024
63,856 posts
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alpenrose
Or take the watch off at night.
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23 Jul
2:56pm, 23 Jul 2024
3,847 posts
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Bowman 🇸🇪
I don’t want to upset anyone here. 
But my Garmin usually is pretty spot on.
Update in race predictions made it a bit better and more accurate for me. Sleep is most of the time spot on. Stress/HRV and so on usually fit well with what I have done and how I feel.
If I feel crap and Garmin also sense something, I sometimes can perform pretty well anyway, and if I feel great and Garmin acknowledge the same I can have crap runs anyway
But overall feeling and metrics is mostly very consistent and similar.
But it never dictates what I do.
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23 Jul
3:14pm, 23 Jul 2024
1,478 posts
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Sam Jelfs
My Garmin Fenix 6X sleep score was rubbish, many times I would have had broken nights having woken up many times, and it would say I had slept well. Until I broke it yesterday that was...
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23 Jul
3:14pm, 23 Jul 2024
56,190 posts
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EvilPixie
Oh dear
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23 Jul
3:16pm, 23 Jul 2024
25,276 posts
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larkim
I think it's the usual bell curve stuff. For some lucky people, the guesstimates from the race predictions, stress scores etc etc will work. And for a lot of people the calculations will be pretty close, or good enough. But then there'll be people on the outside of the bell curves for whom it is wildly wrong, and everyone else between too.
I'm with Bowman, even the "old" tech race predictors are pretty reliable for me (with the exception of the marathon), I got 100% accurate HR readings from my Garmin and things like stress scores / VO2Max are about right. But I appreciate I'm unusual!
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23 Jul
3:17pm, 23 Jul 2024
6,190 posts
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K5 Gus
Rumours of the Fenix 8 coming out in August if you want the latest, shiny, fabby-dozzy one
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23 Jul
3:17pm, 23 Jul 2024
45,392 posts
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SPR
I think if the watch starts to affect you negatively then turn the data off or sleep without it. Garmin already doesn't show you the data in the morning report on the day of a race as an acknowledgement that it can have an effect.
As Bowman alluded to, it should be a useful tool not a dictator and we know it's not going to work perfectly for everyone.
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