Standard fitness advice fails at 3 AM. We build circadian and metabolic protocols for the people who keep the world running.
7 pages. Nutrition, hydration, caffeine, and post-shift decompression. No spam.
Four concrete ways that standard health and fitness frameworks break down under shift-work conditions. This is biology, not motivation.
ERR_1.0
Eating 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. It is not your fault. It is your schedule.
ERR_2.0
The nadir of the human circadian cycle hits between 03:00 and 05:00. Your reaction time drops. Your decision-making degrades. Performance coaching that ignores this window does not protect you — it exposes you.
ERR_3.0
Sleep pressure and circadian drive operate independently. After a night shift, both work against you in daylight. Light suppresses melatonin. Social noise fragments recovery. Most advice tells you to "just sleep when you can." That is not a protocol. That is surrender.
ERR_4.0
The fitness industry was built by, and for, people who train at 6 AM or 6 PM. Pre-workout at 2 AM. Fasting windows that assume a dawn-to-dusk biology. Progressive overload programmes that do not account for a 14-hour recovery window that starts at sunrise. None of this was written for you.
OUTPUT // CIRCADEX AUDIT: Shift workers represent approximately 20% of the working population in developed economies. They show 2× the metabolic syndrome incidence, 40% higher cardiovascular risk, and 33% more musculoskeletal injury rates than day workers. They are the largest underserved cohort in health and performance. We exist to change that.
Our methodology is built on circadian medicine, metabolic science, and applied recovery physiology. Three pillars. One integrated system.
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.
Managing light exposure and sleep architecture
The circadian clock is entrained by light first, food second. We map your specific roster to identify the precise windows for light exposure, avoidance, and sleep opportunity. No generic blackout curtain advice. A tailored light protocol — morning anchor, evening wind-down, and shift-break management.
Protocol Outputs
The 3 AM fasting window and bridge meals
Meal timing for shift workers is not about what you eat — it is about when biology allows you to process it. We define your biological eating window, your 3 AM fasting protocol, and your bridge meals: small, low-insulin-load foods that sustain performance without triggering the fat-storage cascade.
Protocol Outputs
Tactical decompression post-shift
Recovery is not passive. It is the highest-leverage training stimulus available to shift workers. We prescribe decompression protocols for the post-shift window: nervous system down-regulation, sleep-onset acceleration, and a physical training schedule that works with — not against — your biological recovery curve.
Protocol Outputs
BSc (Hons) Sports Rehabilitation
Circadex Performance started with a question Jon could not stop asking: why do the people who work the hardest hours get the worst health advice?
After a decade in retail, hospitality, and tourism — and watching the same pattern of fatigue, weight gain, and broken sleep play out in colleagues, family members, and people close to him working in aviation — Jon redirected his clinical focus. The intersection of Sports Rehabilitation, HRV data, and Circadian Biology became the foundation of everything Circadex builds.
The goal is not to help shift workers cope. It is to give them the same quality of biological support that professional athletes take for granted — adapted to a roster, not a training camp.
[ Photo — Jon Goodbourn ]
BSc (Hons) Sports Rehabilitation
Clinical grounding in how the body recovers from sustained stress and physical load.
Circadian & HRV Specialist
Connects Heart Rate Variability data to roster patterns to map real biological state — not estimated wellness.
10 Years Outside the 9-to-5
A decade working in retail, hospitality, and tourism. The physical toll is not theoretical.
Professional Registrations
A one-off audit, ongoing coaching, or the platform in development. Every service is built around one thing: your roster.
Your roster decoded. Your biology mapped.
A dedicated digital consultation in which we break down your specific shift pattern — the days on, the days off, the rotation cycle — and map it against your circadian biology. You leave with a bespoke meal timing schedule, sleep architecture plan, and light exposure protocol. Not a template. A protocol built for your exact roster.
Includes
Continuous support. Adjusted to your roster as it changes.
For those who want sustained support beyond the initial audit. Ongoing coaching adapts your protocols as your roster changes, your metrics shift, and your goals develop. Contact frequency and depth of support are agreed at the start — no fixed package that does not fit your situation.
Includes
Circadex in your pocket. Built for the 3 AM reality.
A dedicated mobile platform for anyone working non-standard hours: roster-synced protocols, meal timing alerts, sleep windows, HRV tracking, and progress analytics — all built around your specific shift pattern. Currently in development. Join the waitlist to shape the beta and receive founding-user access.
Includes
Hands-on support. On-location delivery.
Training sessions, sports massage, manual therapies, and education resources delivered in and around Manchester — including hotel visits. Bookable as standalone sessions or integrated into an ongoing coaching plan.
Includes