I know you can export the sleep data into a CSV, is it possible to extract HRV data from this? I looked at the file; though unable to determine which metric relates to hrv.
Hello Bull, HRV measurements are stored as Events in the sleep record, you will see them in the exported CSV. “SDNN” events contain SDNN readings at 5minute intervals, “SDANN” event contains SDANN statistic for the entire night.
https://en.wikipedia.org/wiki/Heart_rate_variability#Time-domain_methods[36]
Jan
Awesome thanks. I’ll take a look in the morning 
Dan