The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
so what heart rate variability is doing is asking the question how much variability is there between those beats and you might think well if you're just sitting there at rest how much variability can there be and the answer is it depends on what time scale you're using to measure it if you're just measuring it in seconds not much at all but if you're measuring it in one thousandth of a second or milliseconds there could be quite a bit
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
as you mentioned you're starting with this gold standard of okay we can accurately pinpoint where are these r r intervals and so we pull out what are called the RR intervals not you know surprisingly and we'll plot those now from there you do what's called correction basically you have to filter data there for filter ectopic beats which are Beats that don't actually arise in a signal atrial node you fill out if there is any noise in the signal or anything like that and you end up with this clean set of RR intervals
as you mentioned you're starting with this gold standard of okay we can accurately pinpoint where are these RR intervals and so we pull out what are called the RR intervals not you know surprisingly and we'll plot those now from there you do what's called correction basically you have to filter data there for filter ectopic beats which are Beats that don't actually arise in Signal atrial node you fill out if there is any noise in the signal or anything like that and you end up with this clean set of RR intervals
if anybody has seen an EKG everybody watching us has you've got your little p QR s t and you just line up a strip of those and you imagine you were doing this in the olden days you'd have a set of calipers you'd literally measure AC R to R to R to R