Do Weighted Blankets Actually Work?
The evidence is better for anxiety than for sleep itself — which is still a reason they help some people, just not the reason usually given.
Sleep is the north star
You get 24 hours.
Sleep decides what you do with them.
Every hour of your day is downstream of the night before. 24 North is a field guide to the full cycle — how you wake, train, eat, wind down, and breathe while you sleep — and how to set each one so the next hour gets easier instead of harder.
Evidence-first. No supplements to sell you. No sleep hacks that need a $3,000 mattress.
The premise
One day, four windows
Nothing in your day stands alone. Light in the morning sets the clock that releases melatonin at night. How you breathe at 2am sets the heart rate you wake up with. Treat the 24 hours as one system and the levers get obvious.
01
~6am — 12pm
Morningset the clock
Light, timing, and the first hour. What actually anchors a circadian rhythm, and how long you have to do it before the day drifts.
Morning protocols
02
~12pm — 6pm
Dayspend the energy
Caffeine half-life, training windows, the afternoon dip. Where your output actually comes from and what quietly borrows against tonight.
Daytime performance
03
~6pm — 10pm
Eveninglower the ramp
The last four hours decide how fast you fall asleep. Light, food, alcohol, temperature, and the wind-down that doesn't require an app.
Wind-down
04
~10pm — 6am
Nightthe north star
Eight hours you don't consciously control, that control everything else. Breathing, architecture, HRV, and the interventions with real evidence behind them.
Sleep and recoveryLatest
From the field guide
Should Couples Sleep in Separate Beds?
The research on shared sleep is more mixed than either side of this argument admits, and the honest answer depends on which problem you are solving.
Is It Bad to Sleep With the TV On?
Two separate problems — the light and the sound — and the light one has more evidence behind it than most people expect.
What Time Should You Actually Go to Bed?
There is no universal right answer, but there is a right way to work out yours — and it starts from the wrong end of the night to what most people assume.
The Hot Bath Trick: Why Warming Up Cools You Down
One of the better-evidenced sleep interventions there is, and it only works if you get the timing right — which most people do not.
White Noise or Silence: Which Is Better for Sleep?
Silence wins on the evidence, white noise wins on the practicalities, and the recent research is less flattering to white noise than the market suggests.
Why "24 North"
North is the fixed point you steer by. Sleep is that point for everything else — energy, training, mood, body composition, focus. Get it right and the other 16 hours cooperate. Get it wrong and no amount of optimizing the day makes up the difference. We write about all 24 hours, but we always navigate from the same star.
About 24 North