Show HN: Every Breath You Take – Heart Rate Variability Training

Re:Show HN: Every Breath You Take – Heart Rate Variability T... by kbre93 on Saturday September 16, 2023 @05:35PM (#37538944)

I've it's quite common for fitness trackers to predict the onset of sickness from heart rate variability. I've found they don't offer much real-time feedback, and don't have breathing detection though which was what I wanted to explore for this project, to train hrv

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Re:Show HN: Every Breath You Take – Heart Rate Variability T... by lloeki on Saturday September 16, 2023 @06:45PM (#37539555)

> don't have breathing detection

FWIW my Garmin watch reports a breath per minute metric. Dunno if this is what you were alluding to.

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Re:Show HN: Every Breath You Take – Heart Rate Variability T... by kbre93 on Monday September 18, 2023 @04:08AM (#37553555)

Right, but I don't think they measure it directly (could be wrong), I think they measure it based on change in heart rate

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Re:Show HN: Every Breath You Take – Heart Rate Variability T... by nharada on Saturday September 16, 2023 @09:34PM (#37540605)

Is this a feature that some trackers offer? When I worked at Fitbit I noticed this correlation (along with resting heart rate) and developed a model that could predict onset of illness a few days in advance with fairly good accuracy. But unless the accuracy is perfect it can be difficult to offer it as a product feature without a lot of validation and experiments showing that your health related claim is accurate.

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Re:Show HN: Every Breath You Take – Heart Rate Variability T... by gcanyon on Saturday September 16, 2023 @09:44PM (#37540659)

I can tell I'm sick by looking at my resting heart rate. If it goes up (generally by 5-10 bpm) and I didn't do a hard workout in the past 12-18 hours, I'm pretty likely to be coming down with something.

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