Jan 06, 2020 at 01:04 AM
They put quite a bit of R&D into how and when HRV is measured. Apparently the HRV value is calculated during the end of your last deep sleep state of every night. From what i understand this is the time where your body is most relaxed, meaning you are in a near-dead state of sleep and your body isn't using any resources for digestion, recovery, etc.

