Why the snooze button makes you more tired

Nine minutes is a strange number, and it is a strange number for a reason. It is roughly what the gearing of a mechanical alarm clock produced, and it stuck around long after the gears did. Nobody decided it was the right amount of extra sleep. Nobody decided any amount was.

Which is worth knowing, because the snooze button is the only part of an alarm clock that was designed without any theory of what it was for.

Nine minutes is not a nap

Falling asleep is not instant and it is not free. There is an onset period, and the first stage you enter is the lightest one. Nine minutes is roughly enough time to get into that stage and be pulled back out of it, which is why the second alarm so often feels worse than the first: you are not being woken from the end of a night, you are being woken from the beginning of a sleep.

Do it three times and you have not had twenty-seven extra minutes of rest. You have had three failed attempts at sleep, and you have spent the last half hour of your night in the shallowest sleep available to you.

Sleep inertia is the thing you are actually fighting

The grogginess in the first stretch after waking has a name — sleep inertia. It is normal, it happens to everybody, and it passes. The important part is that it passes *on a clock that starts when you get up*, not on a clock that starts when the alarm first rings.

Every snooze restarts it. You are not waiting out the fog; you are refreshing it. And because sleep inertia is at its worst when you are woken out of deeper sleep, the snooze cycle is a machine for producing the exact conditions that make getting up hardest.

This is why the morning can feel worse at 7:30 after four snoozes than it would have at 6:45 on the first ring. Nothing has gone wrong with your sleep. You have simply restarted the hardest ten minutes of the day, four times.

The real problem is who is making the decision

Set the sleep science aside for a moment, because it is not the strongest argument against snoozing. The strongest argument is that the snooze button moves a decision from a person who can think to a person who cannot.

At eleven at night you know exactly what tomorrow needs, and you are capable of weighing it. At six in the morning, half a second after a noise, you are not weighing anything. You are running whatever the cheapest available action is, and pressing a large button next to your head is the cheapest available action there has ever been.

The alarm was supposed to carry a decision across the night, from the version of you who made it to the version of you who has to act on it. A snooze button hands it back. Every night, you write a note to yourself, and every morning, a stranger throws it away before reading it.

What to do instead

The useful moves are all boring, and they all work on the night before rather than the morning after.

1. Set one alarm, for the time you actually have to be up. Not an optimistic one with three fallbacks. A single alarm you have already decided is non-negotiable is easier to obey than four alarms that are all provisional.
2. Move the bedtime, not the alarm. If you cannot get up at six, the problem is almost never six o’clock. It is that the night before ended at one.
3. Put the decision out of reach. Move the phone across the room, or better, make stopping the alarm require something a half-asleep person cannot do lying down.
4. Get light on your face early. Open the curtains before anything else. Light is the strongest signal your body clock has, and the first few minutes of it do more for the fog than the extra nine minutes ever did.
5. Keep the wake time fixed, including at the weekend. A wake time that moves by two hours on Saturday is a small time-zone change you inflict on yourself every week.

Closing the door properly

Moving the phone across the room works until the morning you learn you can walk over, press the button, and get back into bed. The gap is that stopping the alarm is still one action, and any single action can be performed by somebody who is not really awake.

What actually holds is an alarm that cannot be stopped by an action at all — only by finishing something. That is what Roosta does: you choose the mission the night before, and the alarm rings until it is done. Push-ups counted by the camera, a photograph of the bed you just made, sums read out loud. By the time any of those is finished, the argument about whether to get up is over, because you already have.

If you have tried the phone-across-the-room trick and everything after it, the next piece is about why willpower at six in the morning is the wrong tool.