What Sleep Science Says You Should Actually Do in the Hour Before Bed

The average Australian adult gets just under seven hours of sleep a night, falling short of the eight-hour minimum most sleep researchers recommend for sustained cognitive and physical health. That gap matters. Poor sleep is linked to elevated cortisol, impaired glucose regulation, and increased risk of cardiovascular disease, conditions that Barwon Health clinicians routinely manage across its Geelong campus on Ryrie Street. The question most people get wrong is not how long they sleep, but what they do in the 60 to 90 minutes before they try.

Sleep science calls it "sleep hygiene," which is an unfortunate term for a genuinely useful set of behaviours. Circadian rhythm research published through institutions including the Sleep Health Foundation, an Australian not-for-profit, points to a consistent finding: the nervous system requires a deliberate deceleration period before it can transition effectively into sleep. You cannot sprint through your evening and expect to fall asleep the moment your head hits the pillow. The body needs cues.

That context is sharpened right now by a broader cultural conversation about wellbeing. Hormonal health, mental load at work, and the psychological cost of a relentlessly connected news cycle are all feeding a renewed public interest in restorative sleep. GPs at practices across Geelong's inner suburbs, from Newtown to Belmont, report sleep-related complaints among the most common reasons patients book appointments.

The Routine That Actually Works

Sleep researchers identify three consistent pillars of an effective wind-down: light management, thermal regulation, and cognitive offloading. Each one has a practical Geelong application.

Light is the most powerful circadian signal the brain receives. Dropping overhead lighting and switching to warm, low-lux lamps about 90 minutes before bed signals to the suprachiasmatic nucleus, the brain's internal clock, that darkness is coming. Screen-based blue light suppresses melatonin production, which is why late scrolling delays sleep onset even when you feel tired. The fix is boringly simple: phone face-down, main lights off, and if you're going to watch television, lower the brightness by at least half.

Thermal regulation is the one most people ignore. Core body temperature needs to drop by roughly one degree Celsius to initiate sleep. A brief outdoor walk in Geelong's winter air, the waterfront promenade between Steampacket Gardens and Eastern Beach is exactly this kind of environment, creates precisely that cooling effect. The walk also handles the third pillar, cognitive offloading, by giving your mind low-stakes sensory input that interrupts rumination. Geelong Waterfront parkrun participants, who gather at Eastern Beach every Saturday morning, frequently report that their best sleep follows an active outdoor evening the night before.

For those who prefer a more structured approach, the Barwon River walking trail between Breakwater and Fyansford offers a 9.5-kilometre route that can be shortened to a 20-minute evening loop near the Queens Park precinct in Newtown. Low lighting, flat terrain, and proximity to residential streets make it accessible even in the cold. Wrap up, walk at a comfortable pace, and you've handled light reduction, thermal cooling, and mental decompression in a single 25-minute effort.

What to Do When You Get Home

The re-entry matters as much as the walk. Sleep researchers recommend what is sometimes called a "buffer zone" activity, something absorbing but not arousing. Reading a physical book is the gold standard; it requires focus but generates no notifications and emits no blue light. A warm shower or bath about 40 minutes before bed triggers a paradoxical cooling response as the body radiates heat after you step out, accelerating the temperature drop that sleep requires.

Writing a brief to-do list for the following day, not a journal, just three to five items, has measurable effects on sleep onset time. A 2018 study published in the Journal of Experimental Psychology found that participants who spent five minutes writing a specific next-day task list fell asleep significantly faster than those who wrote about completed tasks. The act externalises mental load and, in effect, gives the brain permission to stop processing.

Anyone experiencing persistent sleep difficulties, more than three nights per week for longer than a month, should book an appointment with a GP rather than self-managing. Barwon Health's community health services can provide referrals for formal sleep assessment. Wind-down routines are a starting point, not a substitute for clinical support when something more is going on.