Recruiting

Sleep Extension

Sponsor:

University of Arizona

Code:

NCT07345767

Conditions

Short Sleep Duration

Eligibility Criteria

Sex: All

Age: 18 - 60

Healthy Volunteers: Accepted

Interventions

Sleep Diary

Fitbit

Study Details

Brief summary:

The main goal of this study is to evaluate whether a manually determined sleep extension intervention is effective at improving sleep and related outcomes among adults who find it difficult to get enough sleep.

Conditions

Short Sleep Duration

Study ID

NCT07345767

Start date

Aug 1, 2026

Status verified date

May, 2026

Completion date

May 31, 2027

Anticipated

Primary completion date

May 31, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 60

Healthy Volunteers: Accepted

Inclusion Criteria:

1. Be between the ages of 18-60 years old
2. Have a typical sleep schedule of <=6 hours per night
3. Must have a FitBit device (any model) with Heart Rate Monitor
4. Must have bedtime between 8 pm and 1 am
5. Must have a waketime between 5 am and 10 am
6. Must not have insomnia as determined by diagnosis or score on the Insomnia Severity Index (ISI), or must be treated.
7. Must not have sleep apnea as determined by diagnosis or STOP-BANG scale, or must be treated.
8. Must have a computer or smartphone device for daily sleep diaries.
9. Must have an initial sleep efficiency of at least 85% as determined by sleep diaries and actigraphy.

Exclusion Criteria:

1. Any condition that the PI considers would significantly impede participation in the study.
2. Participant is under 18 years of age or older than 60 years of age
3. Does not own a FitBit device with Heart Rate Monitor
4. Sleep >6 hours per night.
5. Typical bedtime before 8 pm or after 1 am
6. Typical waketime before 5 am or after 10 am
7. Diagnosed with sleep disorders including insomnia or sleep apnea
8. Diagnosed mental health disorder which may impact sleep (i.e. Bipolar Disorder)
9. Taking medications that may affect sleep.
10. Baseline sleep efficiency less than 85%.

Study Design

Enrollment

1038 participants

Anticipated

Allocation

Randomized

Intervention Model

Single group

Primary purpose

Other

Interventions and Outcome Measures

Arms

no intervention: Control

The control group receives standard feedback, where they will be asked to maintain a consistent sleep schedule irrespective of what the Fitbit data or sleep diary report.

experimental: Intervention: Sleep Diary

This arm receives weekly feedback on their sleep schedule based on sleep diary data.

experimental: Intervention: Fitbit

This arm receives weekly feedback on their sleep schedule based on Fitbit data.

Interventions

Sleep Diary

Based on the participant's sleep diary data, a new weekly sleep schedule will be prescribed as follows: if sleep efficiency is <85%, the prescribed time in bed is reduced by 15 minutes (reducing sleep opportunity by 15 minutes); if sleep efficiency is 85-90%, the schedule remains unchanged; if sleep efficiency is >90%, the prescribed time in bed is increased by 15 minutes, allowing an extra 15 minutes of sleep opportunity.

Fitbit

Based on the participant's Fitbit data, a new weekly sleep schedule will be prescribed as follows: if sleep efficiency is <85%, the prescribed time in bed is reduced by 15 minutes (reducing sleep opportunity by 15 minutes); if sleep efficiency is 85-90%, the schedule remains unchanged; if sleep efficiency is >90%, the prescribed time in bed is increased by 15 minutes, allowing an extra 15 minutes of sleep opportunity.

Primary outcome measure

  • Sleep Duration [ Time Frame: 9 weeks from enrollment to the end of the study ]

Central Contacts and Locations

Central contacts

Annie Chen, Bachelors of Science

520-621-5850sleeptechstudy@arizona.edu

Denisse Armenta

520-626-1737armentamd@arizona.edu

Locations

University of Arizona

Recruiting

Tucson, Arizona, United States, 85719

More Information

Sponsor

University of Arizona

Last update posted

May 14, 2026

Last verified

May, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-19. This information was provided to ClinicalTrials.gov by University of Arizona on 2026-05-14.