An introduction to insomnia, sleep apnoea, restless legs and circadian rhythm disorders, with signs that it is time to seek professional help.
When poor sleep isn’t a lifestyle issue: a guide to sleep disorders
Sleep hygiene: what the evidence actually supports
Explore the evidence behind sleep hygiene, including regular routines, light, temperature, caffeine, exercise and sound.
Sleep debt: is it real, and can you pay it back?
Explore how sleep debt builds, what it does to concentration and mood, and what the evidence says about recovery sleep and weekend lie-ins.
Your internal clock: how the circadian rhythm works
Learn how your circadian rhythm shapes sleep, how light and daily routines affect it, and what can disrupt your internal clock.
The architecture of a night’s sleep: why not all sleep is equal
Understand sleep stages and cycles, what REM and deep sleep do, and how cutting sleep short or drinking alcohol can disrupt your night.
What’s actually happening to your body while you sleep
Sleep supports memory, emotional processing, hormone regulation and immunity. Learn what happens overnight and how sleep loss affects you the next day.
Sleep earbuds, headbands or wearable-free: what actually fixes your sleep?
Short answerStart with what’s keeping you awake.If it’s noise, a snoring partner or the street outside, sleep earbuds are the best tool for it. Nothing else here blocks sound as well.If the problem is falling asleep or lying awake at 3am, blocking noise won’t touch it. That’s a different job, and it’s the one EEG…
Does sound healing actually work? What the science says
Short answer “Sound healing” is a broad label, so the answer depends on what you mean by it. There is reasonable evidence that listening to calming, structured sound (music in particular) helps people relax and can improve subjective sleep quality. There is weak and preliminary evidence for specific “healing frequencies” such as 432 Hz or…
Do Sleep Sound Apps Work? What a New RCT Found
A new randomised trial of 495 adults found generic sleep-sound apps don’t meaningfully improve sleep disturbance. Here’s what the evidence shows.
Independent study links audio neuromodulation to improved sleep quality in adults
New independent pilot data presented at World Sleep 2025: SleepEngine™ improved PSQI sleep quality scores, with gains sustained eight weeks after use.
