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.
The ultradian rhythms that occur during sleep are hardwired, unerring. You don't get the option of making your sleep cycles 120 minutes or five minutes. You don't get that option. But if you decide that you want to apply ultradian rhythms to work and performance, you can set a clock and decide, okay, now the focus begins.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
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.
ultradian rhythms are any rhythms that are shorter than 24 hours. And typically when people ask about or talk about ultradian rhythms, they are referring to 90-minute rhythms.
Typically when you wake up is the beginning of the first 90-minute cycle, but it's not down to the minute.