Night Shift Belly
HIGH EVIDENCEEating during your biological night drives insulin resistance and preferential fat storage around the viscera. The standard meal plan — built for a 9-to-5 gut — accelerates this.
Peer-reviewed · Evidence-based
The Science
Behind the Method.
The clinical and biological evidence underpinning everything Circadex does. For anyone who wants to understand the why, not just the what.
Five things your body does differently on a non-standard clock.
Insulin resistance peaks during the biological night, regardless of wakefulness.
Cortisol awakening response is blunted in chronic shift workers, impairing morning recovery.
Blue-light exposure after 23:00 suppresses melatonin by up to 50% for 90 minutes.
Protein synthesis efficiency drops by approximately 20% during the circadian nadir (03:00–05:00).
Social zeitgebers — meal times, daylight, alarm clocks — are primary circadian anchors. Misalignment compounds across a 3-day roster.
The scale of the problem.
0%
of the working population works non-standard hours
0×
metabolic syndrome incidence vs day workers
0%
higher cardiovascular risk in shift workers
0%
more musculoskeletal injuries than day-shift counterparts
The biology of the problem
Why shift work damages health. The clinical evidence.
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The 3 AM Wall
REPLICATEDThe nadir of the human circadian cycle hits between 03:00 and 05:00. Reaction time drops. Decision-making degrades. Performance coaching that ignores this window does not protect you.
Can't Sleep in the Daytime
MECHANISTICSleep pressure and circadian drive operate independently. After a night shift, both work against you in daylight. Light suppresses melatonin. Social noise fragments recovery.
Fitness Advice That Wasn't Written for You
HIGH EVIDENCEThe fitness industry was built by, and for, people who train at 6 AM or 6 PM. None of it was written for a 14-hour recovery window that starts at sunrise.
The biology of the solution
Why our method works. Three pillars explained.
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Light & Sleep
REPLICATEDThe circadian clock is entrained by light first, food second. We map your roster to identify the precise windows for light exposure, avoidance, and sleep opportunity.
Eating Around Your Shift
HIGH EVIDENCEMeal timing for shift workers is not about what you eat — it is about when biology allows you to process it efficiently.
Recovery That Actually Works
MECHANISTICRecovery is not passive. It is the highest-leverage training stimulus available to shift workers — and the most consistently neglected.