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How does snoozing affect your mental state?

Last updated: October 15, 2026

The evidence is mixed. A 2024 lab study found 30 minutes of snoozing did not worsen mood or morning sleepiness. But habitual snoozing goes with more disturbed sleep and a later body clock, and poor sleep is a strong risk factor for depression.

Snoozing and mood

In a lab study of habitual snoozers, 30 minutes of snoozing did not change mood or sleepiness compared with getting up at once, and cognitive test results were the same or slightly better (Sundelin et al., 2024). So snoozing itself may not be what sours your mood; sleep inertia is there either way.

The depression link

Insomnia predicts later depression: in a 2019 meta-analysis, people with insomnia had 2.8 times the odds of developing depression (Hertenstein et al., 2019). In a large US survey, sleep problems flagged 47% of the people who developed major depression in the following year (Eaton et al., 1995). Snoozers report more disturbed sleep than non-snoozers (Mattingly et al., 2022), so habitual snoozing can be a sign of the kind of sleep problem worth fixing.

Fix the cause

Treating the snooze symptom is easy (ByeBed). Treating the cause — chronic short or low-quality sleep — requires schedule and hygiene changes.

Sources

1. Sundelin et al., Journal of Sleep Research, 2024. Is snoozing losing?
2. Hertenstein et al., Sleep Medicine Reviews, 2019. Insomnia as a predictor of mental disorders: a systematic review and meta-analysis
3. Eaton et al., American Journal of Psychiatry, 1995. Prodromes and precursors: epidemiologic data for primary prevention of disorders with slow onset
4. Mattingly et al., SLEEP, 2022 (University of Notre Dame). Snoozing: an examination of a common method of waking (450 working adults)