Comparison of PPG data collected from the Hera Leto Two earphones and a Polar chest strap for heart rate variability (HRV) analysis
All data are available in the /data folder and were collected using the sensors mentioned above and the HRV Logger app for iOS (https://itunes.apple.com/us/app/heart-rate-variability-logger/id683984776?mt=8)
More info on the setup and analysis can be found on the HRV4Training Blog at this link: https://www.hrv4training.com/blog/hera-leto-two-earphones-for-hrv-analysis
Example of results for RR intervals:
and heart rate variability (rMSSD):
