Technology is crazy these days. Sure heart rate alone isnt indicative. But this is where AI (artificial intelligence) kicks in and begins to learn you. How many steps till and increased heart rate? Were you sitting still while blood pressure increased indictated eating? Is it the time you normally have all the same stats, hence dinner time? Were you at a new location? Higher elevation? I could go on, but basically these devices "learn you" - it's not just storing numbers. I have no doubt it could tell not only a different person wearing it, but also based off tons of past study data, determine your age/sex/race pretty quickly.
This is basically the case. It’s taking all your health data and making a pattern. Think off all the things you do that you don’t think about that are small physical movements.
How do you clean your teeth? Do you hold your breath when you brush? What kind of brusher are you-do you wiggle the brush, brush straight up and down, go circles all the way, some combination? Do you brush your tongue or tear a tongue scraper? How often? Do you floss? How often? What’s your flossing method-do you start in the lower right, left, upper right, left? Do you use floss that you need to wind on your finger or those take and toss ones? Where do you throw away your floss? Do you gargle? Spit? Do you rinse? Wash your face before or after? Wipe your face on a cloth?
Now think about your loved ones. They probably don’t have the exact same rhythm. My kid won’t floss unless I ask him if he did. He also uses too much toothpaste and will do two rounds of brushing so he can use more toothpaste. I’m a foamy brusher and like lots of toothpaste, too. My husband uses a single pearl of toothpaste. He also can finish brushing without wiping his face. I have toothpaste on my chin, so I wash my face right after brushing. I also clean the sink after I’m finished, every time. I floss twice a day. My husband flosses at night only. He uses mouthwash at night and hates it, so he holds his breath and winces.
Just that activity alone shows how different we all are. All of that info? Stored on your Apple Watch. It knows that you physically move this way, your heart rate speeds up when you use mouthwash, you hold your breath when you brush, you gargle for ______ seconds, because your body keeps the score. It also knows when you’re doing something out of the ordinary. When something scared you. When you were interrupted. Those things cause biological responses, and the Apple Watch records all that.
If you were to have your child put on an Apple Watch and brush their teeth, it wouldn’t create the same biological signature. Their heart rate isn’t the same. They don’t breathe the same way or hold their breath at the same time. They don’t have the same movements, their rhythm is different.
I love data like this because you can’t fool it. You can’t lie and have it explained away. No one will believe you, and Apple has plenty of R&D from people that are far smarter than I’ll ever know. It isn’t perfect, but you can’t trick it. The series 5 watches can give you a real time egc. It isn’t going to believe someone else is you while they’re wearing your watch.
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