What actually happens in the first ninety minutes after lights-out
The first sleep cycle is where the night is won or lost. A slow tour of the hour and a half most people treat as leftover time.
Mara Ellison · 21 April 2026
The first key · Key 01
Deep Sleep Zone
Photograph: Lies Thru a Lens / Wikimedia Commons · CC BY 2.0. See image credits.
The original Energy Field site put deep sleep first: not seven hours in bed, but the stretch of sleep in which a body actually repairs. This hub stays with that claim and tests it against circadian science, shift work and the climate we actually sleep in.
Bedroom heat, humidity and the tropical sleep problem
A fan pointed at a damp sheet is not a personality failure. North Australian nights ask different things of a bedroom than a Ballarat winter.
Priya Nadesan · 2 April 2026
Shift work, FIFO and the sleep debt the bush keeps quiet
Night roster, camp room, earplugs, and a body that still thinks it is a day animal. A field note for Australian shift workers.
Tom Reilly · 18 March 2026
An Australian circadian field guide
Latitude, late dinners and a bright kitchen at 9pm all tell the body a story. Here is how light and clock work in this country.
Mara Ellison · 4 March 2026
Why deep sleep, not total hours, decides tomorrow's energy
The original Energy Field site asked for two hours of deep sleep. Here is what that still means in an ordinary Australian bedroom, and what it does not.
Mara Ellison · 11 February 2026