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Matt Walker@drmattwalkerInstagram

This week, we explore the science of bedtime procrastination. Unlike insomnia—where sleep is desired but

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what it claims

Bedtime procrastination is not insomnia: it is the deliberate choice to delay going to bed in order to reclaim personal time. Because this behavior stems from an exhaustion of willpower at the end of the day and a 'night owl' biological profile, it requires adjustments to one's life organization rather than conventional sleep-aid remedies.

holds up

Matthew Walker makes a very accurate distinction, validated by research, between the inability to sleep and the conscious choice to delay bedtime.

noli's read

Matthew Walker makes a very accurate distinction, validated by research, between the inability to sleep and the conscious choice to delay bedtime. Observational studies, notably the pioneering work of Floor Kroese's team (2014) who theorized bedtime procrastination, confirm that it is primarily a conflict of self-regulation. Furthermore, a study by Kamphorst et al. published in *Frontiers in Psychology* supports the idea that the exhaustion of cognitive resources in the evening (decision fatigue) reduces our ability to put down screens. The link with the evening chronotype is also corroborated by observational data: 'night owl' profiles struggle more against the constraints of the day and sacrifice their sleep to afford themselves free time. Although recent observational research highlights that chronic procrastination can eventually promote the onset of real sleep-onset problems, differentiating between the two phenomena is essential. Walker's observation is therefore scientifically robust and encourages reviewing one's time management during the day rather than doubting one's biological capacity to sleep.

the sources

  1. 1Kroese FM, De Ridder DTD, Evers C, Adriaanse MA. 2014

Claimed by Matt Walker. Noli grades the claim, never the person.

Decoded by Noli · July 13, 2026 · the original post

What the graded evidence says

Evidence
C

Linked to, not proven to cause.

Effect
association of bedtime procrastination with insufficient sleep and self-regulation (survey study) — bedtime procrastination predicted self-reported insufficient sleep beyond demographics and self-regulation; lower self-regulation linked to more procrastination
Measured on
community adults (cross-sectional survey)

What’s uncertain

The evidence is cross-sectional and self-reported, so it shows a link, not proof that curbing the habit adds hours. Still, targeting the decision to stay up is low-risk and intuitive.

Matt Walker in the Register108 claims graded · solidity 93/100See their record →

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