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shawnz
on Sept 17, 2023
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Show HN: Every Breath You Take – Heart Rate Variab...
Isn't it possible to estimate breathing rate with any optical heart rate monitor? See
https://en.wikipedia.org/wiki/Photoplethysmogram#Monitoring_...
, afaik that's how Fitbit, Apple Watch etc do it
kbre93
on Sept 18, 2023
[–]
Yes it's common to estimate breathing rate based on the oscillations in the heart rate pattern. But estimating it from the chest expansion is a more direct method
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