I am coming from a GARMIN Venu and before that I used a Fitbit Ionic. Both of those watches measure heart rate approximately once per second, all through the day. I have been reading up on the Apple Watch and I see that it only measures it every ten minutes when not working out. My question is, how can this provide accurate data? There is a lot that can happen between the start and end of ten mimutes. I could get up, walk around the block, and come back in and sit down, and it would miss all of that. I am confused how others can truly consider this a fitness watch and trust the metrics given when it measures one of the most important aspects of day to day life so I frequently. I do a lot of different things when I am not working out.