OHR accuracy of owners of Race 2
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@jsmno OHR on any watch for me is problematic. I’ve tried most of them. Because ZoneSense is so useful I use the Suunto belt most of the time and when running ultra races. I think OHR is highly variable based on individuals because of the underlying technology.
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@Brad_Olwin fully agree, OHR for me is always spot on with Vertical 1 with the velcro-band and a quite tight fit.
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3 days now with Race 2. OHR seems very accurate in 24x7, walking and a 30 minute Zwift ride today.
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I am starting to think that some Race 2 got OHR problems, software or hardware ?
I ran a first and perfect 10k with a fresh new Vertical 2, spot on from start to finish, with the same nylon stretch band than Race 2, same individual.
For reminder, for me with this Race 2
8k 5:35mn/km 160 average most often 165/170
Then
8k 4:43mn/km 138 average with some 120 at 4:00mn/k -
Here is comparison of Suunto 5 (with Suunto Smart Sensor) vs Suunto Race 2 (OHR). I had Race 2 tight enough but still comfortible. It is possible to tighten it one hole more but than it is not comfortable to wear anymore.

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