is not about smbd being so ill, is about an app that is not working properly based on Health readings, as I read in different articles on internet. It is states there: with several readings during a night as Apple Watch does, HRV might not be accurate due to different factors. So, Apple should read them as often as necessary to be accurate I suppose, not because people are ill. People do not have to go to doctor because health apps that are not accurate, don't you think?
https://medium.com/@altini_marco/how-to-make-sense-of-your-apple-watch-heart-rate-variability-hrv-data-89bf4a510438
"it would be foolish to pick a single data point (or just a few) and use those as something representative of the physiological stress level for this person."
"HRV is highly influenced by acute stressors (because your autonomic nervous system is!), hence the importance of the ‘morning routine’, measuring as soon as you wake up (or using the whole night of data, something that currently only the Oura ring does)."
"we have seen that night data automatically collected is of little use, "
