Peter Attia· MD
it turns out when the sympathetic system is revved up hrv goes down and when the parasympathetic system is in control hrv goes up
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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.
it turns out when the sympathetic system is revved up hrv goes down and when the parasympathetic system is in control hrv goes up
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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