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Cardio Fitness Score changes dramatically

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How can your Cardio Fitness drop/increase wildly in a day?  I do more or less that same exercise each week, when I had a Charge 3 it was pretty stable, only changing by a few points if I was on holiday and out of my usual routine?  Anyone else with this?  I had my second replacement device a few weeks ago.  I did find a topic about this, but comments had been disabled LOL 😉 

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Hi, @Chudders, you may be interested in this article What is my cardio fitness score? - Fitbit Help Center I apologise if you have already seen it. My experience is a stable score, I wear my Fitbit 24/7 and exercise daily.

I hope this helps.

Cheers

Gr4ndp4 | UK
AWAKE! for morning in the bowl of light has cast the stone that set the stars to flight.

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Thank you - I had read some of those, one mentions needing to track runs to get a better estimate using GPS, my GPS doesn't work properly either LOL, plus a week or so ago my device stopped tracking my distance, I found some info on the boards about turning the auto stride length off - I did that and now distance is tracked again.  My device is a 2nd replacement that I have had for about 3 weeks - I have had problems before, but not as many as this.  My previous devices were pretty stable with Cardio Fitness score.

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