04/14/2026
Testing 1, 2, 3… curlers in, cortisol up, and another midlife mystery to solve: why are so many women waking at 3am?
There is a pattern I see often in midlife that doesn’t get talked about enough.
You wake between 2–3am, heart racing, fully alert. The next day feels flat …low energy, off appetite, cravings that don’t quite make sense. Nothing in your diet looks extreme, yet something is clearly off.
I was recently listening to Sims discuss this with , emphasizing how front-loading calories earlier in the day—and avoiding large late-evening intake—can improve sleep efficiency and reduce fragmentation. Just as critical: eating enough. Low energy availability, especially earlier in the day, is associated with more awakenings, shorter sleep, and impaired recovery.
This mirrors what I see in practice. One perimenopausal client came in with this exact pattern—undereating through the day, then relying on evening intake. Her circadian rhythm had shifted later, and her cortisol pattern reflected it. We didn’t overhaul everything; we adjusted timing and rebuilt her morning appetite:
• small amounts of food in the morning
• progressing to a protein-based breakfast
• anchoring lunch
• moving to a lighter, earlier dinner
As her intake aligned with her physiology, her sleep consolidated and the early wake-ups resolved.
This is the foundation of circadian fasting—eating in sync with light-driven biological rhythms, earlier in the day, and allowing the body to rest overnight. It’s not restriction; it’s alignment.
I expand on this in my recent article on eating with the sun. Linkinbio
Have you noticed your sleep change depending on when you eat?
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