Race 2 heart rate issues
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Same here, first activity with new firmware. First 11 minutes of OHR reading is incorrect. I had same pace from begining on closed lap. My HR was higher from beggining. Between 30-40min lower HR is fine as i went slower in that part.

But i experienced something like that rarely with old firmware too.
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Came here to see if anyone else was seeing this. Had a few workouts and suspected this but on a new programming and 2nd guessing. Today, I wore this and bicep strap with AmazFit app sync. WILDLY different results for the first 10 mins or so.
First 3 mins or so is a warmup and expected the lower rates there, but after an initial spike, you see the strap lock on at least 5 mins sooner to my cadence.


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I have a similarly suspicious HR output from a pool swim yesterday.

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Another two workouts with very broken HR, the HR is locked until my first rest, then begins to climb.
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@Anrich-Potgieter Ok. I did a repeat of the same workout with the Vert 2 instead of my Race 2 and was back within normal ranges of the bicep strap. Not sure if this is something just with the Race 2 update as they supposedly share the same sensors. I’ll keep testing.
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@dimitrios-kanellopoulos @pavel.samokha is there any known issue to suunto with HR too low for around first 10 minutes of excercise with latest firmwareon Race2 ?
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I have a similar problem with my Race and Polar H10, where it gets stuck at 70-80bpm sometimes.

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I had the same issue yesterday and today the heart monitor stopped working. After a hard reset, the HM came back and it is not working
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I recently got a Vertical 2 and today I did a comparison with a chest strap on the indoor trainer. I am coming from a Garmin Instinct, which always underread my heart rate so much that it was useless. I was very disappointed when I looked at the Vertical 2 during warm-up, where I was already breathing harder and the watch only gave me around 80 bpm, which is what I usually have for an easy walking pace on the flat. I started thinking that there is something wrong with my blood flow because it also doesn’t work! After 10 minutes give or take it was however spot on and matched the strap even up to a heart rate approaching 180 bpm.

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@Daniel-Thomas cycling is always hit or miss due to arm tension/grip etc. Frequently discussed here.