Circadian-informed Optimal Bedtime
Public ClinicalTrials.gov record NCT07889466. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
New Personalized Smart Bedtime Intervention Based on the Data Collected From Samsung Galaxy Watch.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The goal of this interventional study is to test whether circadian-informed bedtime recommendations can improve sleep, next-day psychomotor vigilance, and subjective well-being among healthy adults. The main questions it aims to answer are: * Can Optimal Bedtime derived from data collected by a consumer smartwatch increase the objective total sleep time? * Can Optimal Bedtime derived from data collected by a consumer smartwatch reduce the count of lapse in a next-day Psychomotor Vigilance Task? * Can Optimal Bedtime derived from data collected by a consumer smartwatch increase subjective sleep quality? Researchers will compare Optimal Bedtime with a placebo bedtime and an unguided baseline in a cross-over design. Participants will: * Be randomized 1:1 to either Optimal Bedtime then placebo or placebo then Optimal Bedtime. * Wear a consumer smartwatch for 6 weeks, 2 weeks in each of baseline, Optimal Bedtime, and placebo. * Complete a Psychomotor Vigilance Task and a subjective well-being survey every morning.
Study identification
- NCT ID
- NCT07889466
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 203 participants
Conditions and interventions
Eligibility (public fields only)
- Age range
- 18 Years to 60 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jun 11, 2025 (Actual)
- Primary completion
- Jan 30, 2026 (Actual)
- Completion
- Jan 30, 2026 (Actual)
- Last update posted
- Oct 22, 2026
2025 – 2026
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Massachusetts Institute of Technology | Cambridge | Massachusetts | 02139 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT07889466, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 22, 2026 · Synced Oct 22, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT07889466 live on ClinicalTrials.gov.