Effect of two 30-minute naps during the night - a randomized, crossover, controlled trial

Effect of two 30-minute naps during the night - a randomized, crossover, controlled trial - Effect of two 30-minute naps during the night - a randomized, crossover, controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000054983

Enrollment

Registered

2024-07-17

Start date

2024-08-20

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

Take a 30-minute nap during the night. Take two 30-minute naps during the night. Not sleeping during the night.

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: There are no abnormalities found on the medical examination.

Exclusion criteria

Exclusion criteria: The participants were not obvious morning type or evening type on the "Morningness-Eveningness Questionnaire".

Design outcomes

Primary

Measure	Time frame
A psychomotor arousal task (PVT) was used to assess neurobehavioral function. PVT was measured every hour from 16:00-09:30.	—

Countries

Japan

Contacts

Public ContactSanae Oriyama

Hiroshima University Graduate School of Biomedical and Health Sciences Division of Nursing Science

oriyama@hiroshima-u.ac.jp082-257-5355

Outcome results

None listed

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