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Show HN: Continous Heart Rate for Android Wear and Apple Watch

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Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#41

Post by fancyketchup »

DenisM wrote: post #9
brandonb wrote: post #2

Hey! I'm the OP. Let me know if you have any questions. Just for fun, this was my heart rate while launching this: https://twitter.com/AppCardiogram/status/591377862441046016

Is there any watch on the market that has enough battery to do real continuous HR monitoring? Last I checked, they all only measure continuously in the "sport" mode for an hour or two, and in the "regular" mode they measure HR once every 10 minutes or so.

Suunto's watches have done that for a while now (5-6 years?), though they use a capacitive chest strap, rather than the optical method used by smart watches.

Edit: And as far as I know, Suunto was really the first company to pursue measurement of HR variability. They have some interesting whitepapers, if you use the Google.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#42

Post by andrewjshults »

matco11 wrote: post #36
jhwhite wrote: post #34

Earlier quoted context omitted.

I thought the Up3 only measured resting HR.

You are right. A few months ago Jawbone UP3 definitely had HRV listed in the heart health features. That's specifically why I was looking to buy it. I guess that's close to impossible with an optical sensor.

Even the standalone optical HRMs (e.g., Scosche RHYTHM+) aren't good enough to do HRV[1] even though their accuracy compares favorably with the chest strap models[2]

[1] http://www.dcrainmaker.com/2014/05/scosche-antbluetooth-opti... about 10% down the page [2] http://www.dcrainmaker.com/2014/05/scosche-antbluetooth-opti...

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#43

Post by calvin_c »

_asummers wrote: post #40
ianstallings wrote: post #22

I'm curious about the privacy aspects of it. Can anyone elaborate on where and how the data is stored?

In a related question, does anyone know of any monitoring product (e.g. FitBit or whatever) that does NOT send your data to a centralized server outside of your control?

As far as I know the Apple Watch is the only one that doesn't sync to a server somewhere. All data is kept stored in HealthKit on your device.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#44

Post by bbarn »

OP - I love the concept, but the execution isn't there. I installed it on my Gear Live, and it pops up a "Heart Rate" notification, that until acknowledged leaves the heart rate sensor on. (the green light underneath). This would obliterate the battery. It needs to do it's thing, and go away, not wait for me to tell it to, or even notify me at all. I'm not sure with the API if this is possible or not, but for now, I'm sorry.. it's just not usable.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#45

Post by photonic29 »

saspect wrote: post #32

Capturing HR once a minute is of really limited use. More than benchmarking against resting HR, the interesting thing is to look at heart rate variability, and to do that you need to scan several times per second. For that using purpose-built devices is just better. I am thinking: https://jawbone.com/store/buy/up3 or http://www.getqardio.com/qardiocore-wearable-ecg-ekg-monitor...

Photoplethsymographic heart rate requires a lot of algorithmic compensation for noise and motion artifact. There are some pretty sophisticated strategies available for beat interpolation, but individual R-R intervals are tremendously more difficult to recover accurately against real-world noise. HRV measurements are also very intolerant to error in R-R interval, and even less so to dropped beats. There are certainly conceivable solutions to these problems, but no major manufacturer of PPG based consumer heart rate devices allows access at a level low enough to get R-R time series or understand R-R interval confidence. OEM module manufacturers for pulse ox devices do allow direct serial access to the PPG waveform for those interested in hacking at it.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#46

Post by Navarr »

brandonb wrote: post #2

Hey! I'm the OP. Let me know if you have any questions. Just for fun, this was my heart rate while launching this: https://twitter.com/AppCardiogram/status/591377862441046016

Does this report heart rate data back to Google Fit, or does it only read info from Google Fit?

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#47

Post by potomushto »

I use a fitness tracker called MIO Fuse - it's a great сontinious Heart Rate Monitor, but Mio has very painful and useless both Android and iOS app. I wish to have access to raw data or integrate it with something like Cardiogram because it's really insightful to see how your heart responds to various events.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#48

Post by blazingswrd »

Hey Brandon, I'm doing usability research at Virginia Tech on EEG's and EKG's. I'm trying to figure out how to do continuous heart rate for Apple Watch for an app/study.

How are you getting the Heart Rate on the watch? I've looked into WatchKit and I couldn't find anything about getting the heart rate back out of the device. I was thinking about using Healthkit to try to do something similar. If there's any chance, we could talk/skype sometime, please let me know!

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#49

Post by brandonb »

photonic29 wrote: post #45
saspect wrote: post #32

Capturing HR once a minute is of really limited use. More than benchmarking against resting HR, the interesting thing is to look at heart rate variability, and to do that you need to scan several times per second. For that using purpose-built devices is just better. I am thinking: https://jawbone.com/store/buy/up3 or http://www.getqardio.com/qardiocore-wearable-ecg-ekg-monitor...

Photoplethsymographic heart rate requires a lot of algorithmic compensation for noise and motion artifact. There are some pretty sophisticated strategies available for beat interpolation, but individual R-R intervals are tremendously more difficult to recover accurately against real-world noise. HRV measurements are also very intolerant to error in R-R interval, and even less so to dropped beats. There are certainly…

This is really useful! Would you mind emailing me at brandon@cardiogr.am? I'd love to know more.

Re: Show HN: Continous Heart Rate for Android Wear and Apple Watch

#50

Post by brandonb »

blazingswrd wrote: post #48

Hey Brandon, I'm doing usability research at Virginia Tech on EEG's and EKG's. I'm trying to figure out how to do continuous heart rate for Apple Watch for an app/study. How are you getting the Heart Rate on the watch? I've looked into WatchKit and I couldn't find anything about getting the heart rate back out of the device. I was thinking about using Healthkit to try to do something similar. If there's any chance, w…

Sure, email me at brandon@cardiogr.am.
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