[ttul]

I’d love to see whether you could tease out heart rate and respiration from this data. If you already wear an Apple Watch or Fitbit, that data is continually collected. Shoving everything into a time series model with enough samples might do the trick.

[nradov]

Heart rate will probably be tough without a dedicated sensor. Sennheiser now sells earbuds with an optical HR sensor but accuracy is bad.

https://www.dcrainmaker.com/2024/05/sennheiser-momentum-temp...

Respiration rate is harder. It requires precise heart rate variability data to detect the start of a breath.

[pedalpete]

I wonder if "accurate enough" hr could be achieved through filtering accelerometer data? You'd have to be quite still, but if the device knows you're doing push-ups, and what range your heart-rate could be in, it may be able to filter out other movements.

Respiration can be measured with microphones, and again, movement, but I suspect this may be more challenging than filtering HR.

[cleverbit]

I’ll see what I can do, thanks for the feedback!