Body clock study reveals when we lose track of time

NCT ID NCT07294781

Recruiting now Knowledge-focused Sponsor: University of Aarhus Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how the body's internal clock changes our perception of time when we stay awake for 36 hours. Thirty healthy adults will remain awake in a controlled lab, with constant light, posture, and food. Every two hours, they complete tests on time estimation, reaction speed, and mood, while saliva samples track melatonin levels. The goal is to identify when during the day-night cycle people are most prone to time distortions and reduced alertness, which could help improve shift-work scheduling.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this study could help design better shift schedules to reduce errors and accidents caused by distorted time perception and sleepiness.
What could go wrong: This is a small, early-stage observational study in healthy volunteers, so findings may not apply to real-world settings or people with sleep disorders.

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder Sleep Deprivation

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CIRCADIAN RHYTHM HEALTHY VOLUNTEERS SLEEP DEPRIVATION TIME PERCEPTION

Contacts and locations

Locations

Aarhus University, Department of Psychology and Behavioural Sciences
RECRUITING

Aarhus, 8000, Denmark

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