With watch OS4, Apple Watch now measures also HeartRateVariability in mS ??
But what's a normal value and can someone please explain a little bit more about this HRV, like when and how often it's measured. And most important, like I asked before, what are normal values. My watch now says that my HRV is 46 ms.
Apple Watch Series 2, watchOS 4
Hi I had the exact same question... and was actually a little concerned my readings seemed to appear quite low to what google search results suggested were "normative"
I found a really good website (hrvcourse.com) which has a gender/age chart. iOS records SDNN (std deviation of HRV over short time samples) so if you want to compare your readings from iOS look at the SDNN (ms) column.
FWIW I did speak to apple support about this.. if the trend is provide ever more technical health data they need to put more effort into directing users to "the science" so we can interpret what we're being told.
In your iphone health app
Health Data Tab > Heart
I have found that It is recorded most accuracy when you use the breath application - it updates it to the same location
A trainer by the name of Joel Jamieson has done extensive research on HRV for athletes to prevent overtraining and enhance recovery. Google him for the most updated research.
This site now charges $250 for a “course” in HRV. Jeez. I come here to learn and get asked for $. Did you pay?
heart rate variability
