I am no doctor, but isn't your heart rate dependant upon your weight? I thought the maximum heart rate decreases if you lose weight. Why not check for the users weight in this page itself, otherwise wouldn't there be a lot of false alarms??
You're a fool if you actually believe what you wrote - thank GOD you're not a doctor.
Your heart rate is dependant on:
Heart muscle health and strength
viscosity of your blood (you'd be VERY surprised how many people do not drink enough water and how this affects the blood in their veins),
Heart conditions have a DRASTIC affect here: example angina or growth murmurs for which I've experienced for 2yrs at the age of 13-15yr old. This affected not just track and field performance (passing out top speed mid stride face FIRST into the ground) but also even just walking.
Valves ... if your heart valves do NOT close properly no matter how healthy the rest of your heart is, your weight, how you eat, low cholestrol or blood cholesterol serum ... you're going to be VERY weak in energy, breathe and movement!!
Irratic heart beat ... main focus of this article (or how it occured) will mess you up as well.
NOTE: I've never been overweight in my youth and only this past 6mths eating like a pig daily eating out (Cinnabons, Burgers, fries ... and just pure junk not going to the gym in 3mths)! I've always been very skinny until I was 37yr and I'm 45 in 2wks.
Over the course of 3wks 4mths ago when I was consistently going to the gym yet eating a LOT more calories to gain muscular density (bodybuilding the traditional 80's way) ... sitting down listening to tribal music surfing the next signigicantly bumped my resting heart rate to 141 bpm ... I didn't even feel it until a half second after AppleWatch S2 detected and reported it. it's like my heart registered a tap dance in my chest causing a sinking feeling my my throat for a moment and it's very scary!
The watch looks at your resting heart rate ... comparing slow movement, brisk movement, elevation changes between them as well as your full sleeping heart rate with barely any movement over the course of a few weeks. i know this for a fact as I've not had an Apple Watch for 2mths when I sold mine and bought an AW3 just 2wks ago and I've yet to receive any warnings yet ... I know I will in about a week.
A benefit of volunteering to participate in the study. Glad to see it paying some dividends.
Imagine if this study was opened up across the world?!!
Great benefits and I applaud Apple for it. This and the Watch alone has solidified my loyalty to iOS & Watch OS for some time to come. I'm hoping for better competition to really push Apple further. Example I'd love to see a sudden elevation change to sudden stop in movement detected by gyroscope, along with drop in vitals to immediately suggest and dial 911 if not cancelled in 10 seconds: ederly, those with a stroke would seriously benefit from this.
This technology could already save millions of lives a year if it was widespread. And imagine, say, the AW 10.
Most likely this has already prevented many such as myself from having a severe event by taking notice of the condition ... then changing exersize habits, sleeping, breathing (stress reduction / focus), and eating habits.