The effect of daytime napping under two different light conditions after simulated night work on biological rhythm in healthy human

The effect of daytime napping under two different light conditions after simulated night work on biological rhythm in healthy human - The effect of daytime napping under two different light conditions after simulated night work on biological rhythm in healthy human

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000020642

Enrollment

Registered

2016-02-01

Start date

2016-02-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adults

Interventions

[Bright light condition] Taking a daytime nap under bright light condition after a simulated night work [Dim Light condition] Taking a daytime nap under dim light condition after a simulated night

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Healthy adult male

Exclusion criteria

Exclusion criteria: 1) Mental diseases 2) Extreame morningness-type 3) Extreame eveningness-type 4) Sleep disorder 5) Smorker

Design outcomes

Primary

Measure	Time frame
Delta of Dim Light Melatonin Onset between baseline and next day	—

Countries

Japan

Contacts

Public ContactTomoko Wakamura

Graduate School of Medicine, Kyoto University Human Health Sciences

wakamura.tomoko.5v@kyoto-u.ac.jp075-751-3974

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026