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If you're keeping track of what and when someone is eating/drinking, Apple can make active suggestions for postprandial glycemic management. There's a small window where you can lower peak sugar after eating without a hormone (insulin) response. Searching or asking AIs about postprandial exercise science will show the new research on this topic. Many YouTubers have excellent presentations on this topic.

You don't need any device to tell you what to do metabolically, but it could certainly be helpful.

Are they able to do this accurately? If so, it could be useful. If not 100% accurate, then it is not useful. Just like the Sleep function, one night I woke up multiple times and had problems in falling asleep. On the next day, my Watch 11 reported that I got a very high excellent sleep score! Seeing that and also the announcement from Apple killing many watches, I immediately returned the watch.
Please. The current fitness circles are not 100% accurate. OTOH, many users have reported dramatic results from regularly completing the fitness circles.

Postprandial exercise is effective. It can have a dramatic impact on your body composition and overall health. If Apple has found a way to monitor and effectively suggest movement during that postprandial window, power to them. My point: we don't need to buy anything from Apple to benefit from their studies on this quite new exercise technique. This is a very young area of study: most of the papers have been written in the past 5 years.

If you're searching for 100% for anything about our bodies and health, you're going to be frustrated for a long time. Nothing is 100%

BTW: keep working on the sleep thing. There is a bunch of new research on circadian cycles and specific recommendations about it. There are things that can be monitored with a wearable device -- see the MiEye. I'm fondly hoping that Apple moves in this direction in the future; we are rather ignorant about the complex dynamics of lighting and circadian cycles. The photobiomodulation database has now grown to over 10,000 science papers, and most of us know absolutely nothing about what's been found in that vast body of science on red- and near-infrared (NIR) radiation. If you want to get a high-level view, this query to the AIs is a good place to start.

You won't find "100% accurate" -- 100% effective -- results about physiology and metabolism anywhere. Seriously question anyone who ever told you to search for 100% effective results in your health habits.
 
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if this is really where Apple is taking the watch, I will need to re-think, had AWs since 2015 and as of now it's still my favorite device. But if the focus is going to shift to "AI", not sure.
And, it will make me want to stay on watchOS 26 ...
We shall know in a couple hours or so
 
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And yet another thread full of people with a “I don’t need it, so no one does therefore it is useless” nonsense (granted, not everyone, but many people).

I clicked this news story because it specifically would be a key reason, if not the only reason, to consider an upgrade.

My life is so outstandingly hectic and busy, that I literally do NOT know what I’ve done at the end of many days. If this system actually worked (and there I am dubious) then it could be exceptionally useful to me, and I am sure many others.

Granted, it would be far more useful if it summarised what people had said and listed my targets and new tasks etc based on those conversations (as some products claim to do) but sadly the privacy focus seems to mean this won’t be the case.
 
More "features" = Better justifications for higher prices when presented in front of average Joe. To them, any product with the word "AI" in it is good as it empowers them to help them to cheat and raise their social status.
Average Joe = dumb.
MacRumors Commenter = smart, and their excrement doesn't stink like everyone else's. Did I get that right? Everyone wants to be in the in-crowd. This place is not it.
 
This is such a non-feature they're trying to use to sell a new device. Even if you found this kind of summary to be useful, there's no reason architecturally this wouldn't be much better to have done on your phone- and your watch is likely mirroring your phone notifications.
 
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