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Does snoozing actually give you more rest?

Last updated: May 26, 2026

No. The minutes you gain by snoozing are spent in light, fragmented sleep that does not refresh your body or brain. You wake up just as tired, sometimes more so.

What the research actually shows

Sundelin et al. (2024) compared 31 habitual snoozers across a snoozing night and a non-snoozing night in a sleep lab. The snoozing morning gained 6 extra minutes of slept time, but cortisol, mood, and overnight sleep architecture showed no meaningful difference. The "rest" was illusory. The control group, who got up immediately on the first alarm, performed identically on cognitive tests once both groups were fully awake.

Earlier research (Tassi & Muzet, 2000) reached the same conclusion using different methodology: cognitive performance after a snooze cycle is worse than performance after waking on the first alarm and engaging in any cognitive task. The snooze button is a behavior in search of a benefit.

A 2022 University of Notre Dame study of 21,000 alarm users found that 57 percent of mornings end with at least one snooze, and the average snoozer hits the button 2.4 times. The same study showed that subjective "feeling rested" did not correlate with the number of snoozes.

Why fragmented sleep does nothing for you

A complete sleep cycle averages 90 minutes and passes through light sleep, deep sleep, and REM. Deep restorative sleep (N3 slow-wave and REM) requires uninterrupted cycles. A 9-minute snooze window cannot deliver any deep stage. You stay in N1 or N2 light sleep, which is the least restorative phase. Then you wake again, this time from a partial cycle, which is the worst possible launch into the day.

To put numbers on it: in a 9-minute snooze, you might spend 3 minutes drifting back into N1, 5 minutes in N1, and 1 minute drifting out. There is no measurable physical or cognitive restoration possible in that window.

What you are actually gaining

• The pleasant feeling of choosing to stay in bed. This is dopaminergic, not restorative. Your brain rewards the act of avoidance.
• Warmth. Real, but addressable by turning the heat up.
• A few minutes of light dozing. Subjectively cozy, objectively useless.

What you are losing

• The cortisol awakening response window. The natural cortisol surge starts when you first wake. Going back to sleep blunts the curve.
• Sleep inertia compounds. Every snooze adds 5 to 15 minutes to the time it takes to feel alert.
• Habit formation. The brain treats the snooze as the "actual" wake-up, so the body fights you harder on subsequent mornings.
• Schedule discipline. Snoozers run late more often. Mason et al. (2022) found a 23-minute average lateness gap between snoozers and non-snoozers.

The placebo of "I needed those extra minutes"

If you genuinely needed extra minutes, you would set the alarm for the time you actually have to wake up, not 30 minutes earlier so you can "afford" 3 snoozes. The snooze ritual is not a sleep strategy. It is a way to negotiate with yourself in the early-morning fog. The brain wins that negotiation every time because it is the only party that is fully awake (it does not want you to be).

The honest alternative

If you sleep 5 cycles (7.5 hours), wake on the first alarm, and immediately do a single cognitive task, you will be more alert in 5 minutes than after 30 minutes of snoozing. Cutting the snooze entirely and waking on the first alarm with a forced mission (like ByeBed's photo or push-up tasks) shortens grogginess faster than the snooze ever could.

Common counterarguments

"But it feels good." So does scrolling social media at 2am. Feeling good is not evidence of benefit.

"I get more vivid dreams in those snooze cycles." Yes, because you are jumping into REM. This is a sign of fragmented sleep, not a feature.

"My doctor said it is fine." Read the Sundelin paper or share it with your doctor. The clinical recommendation in sleep medicine is to avoid snoozing.

"I cannot help it." That is the actual problem. Use an alarm that removes the easy option.

Sources

1. Sundelin et al., Journal of Sleep Research, 2024. Is snoozing losing? Why intermittent morning alarms are used and how they affect sleep, cognition, cortisol, and mood.
2. Mason et al., University of Notre Dame, 2022. Snooze button behavior study (21,000 users).
3. Trotti, Nature and Science of Sleep, 2017. Sleep inertia: current insights.
4. Tassi & Muzet, Sleep Medicine Reviews, 2000. Sleep inertia and its impact on cognitive performance.