Evening exposure to differing spectral composition of light on human sleep and energy metabolism

Evening exposure to differing spectral composition of light on human sleep and energy metabolism - Evening exposure to differing spectral composition of light on human sleep and energy metabolism

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000042654

Enrollment

Registered

2020-12-04

Start date

2018-10-01

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

Light exposure 4h prior to sleep Light exposure 4h prior to sleep No light exposure 4h prior to sleep

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Healthy young males and females 2. PSQI < 6 3. Intermediate chronotypes

Exclusion criteria

Exclusion criteria: 1. Individuals with current or past diagnoses in the following: a. Heart, liver, kidney, cardiovascular disease, and diabetes b. Allergic to the equipments in the laboratory 2. Claustrophobic 3. Sleep disorders 4. BMI < 18 or BMI > 25 5. Night shift workers 6. Transmeridian travel 1 month prior to the experiment day 7. Drinks alcoholic beverages on a regular bases 8. Smoking habits 9. Color blindness (Ishihara color blindness test) 10. Pregnant 11. Difficulty hearing in the past

Design outcomes

Primary

Measure	Time frame
1. Electroencephalography 2. Energy metabolism index	—

Countries

Japan

Contacts

Public ContactAsuka Ishihara

University of Tsukuba International Institute for Integrative Sleep Medicine (WPI-IIIS)

s1630529@u.tsukuba.ac.jp029-859-1858

Outcome results

None listed

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