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ClinicalTrials.gov public records Last synced Oct 23, 2026, 9:00 PM EDT

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Showing 169–192 of 258 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Circadian Rhythms Clear all
Completed No phase listed Observational Accepts healthy volunteers

The Incidence of Breast and Other Cancers Among Female Flight Attendants

NCT00342407
View directory record Official record
Conditions
Thyroid Cancer, Breast Cancer, Non-Melanoma Skin Cancer, Melanoma
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 100 Years · Female only
Enrollment
6,093 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2020
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 10, 2020 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Results available

The Effects of Light Therapy on Circadian Rhythms, Sleep, and Mood in Postpartum Depression

NCT02769858
View directory record Official record
Conditions
Depression, Postpartum
Interventions
Light therapy
Device
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 22, 2021 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Phase 4 Interventional

Lemborexant in Delayed Sleep Phase Syndrome

NCT05463861
View directory record Official record
Conditions
Delayed Sleep Phase Syndrome
Interventions
Lemborexant, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Terminated Not applicable Interventional Results available

Transcranial Direct Current Stimulation Therapy for Sleepiness Related to Shift Work Disorder (tDCS-SWORD)

NCT03879044
View directory record Official record
Conditions
Shift-Work Sleep Disorder
Interventions
Transcranial Direct Current Stimulation
Device
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 25, 2021 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Interaction of Chronic Sleep Restriction and Circadian Misalignment on Sleep and Neuro-cognitive Performance

NCT00438438
View directory record Official record
Conditions
Healthy
Interventions
forced desynchrony protocol with sleep restriction
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 35 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 2, 2011 · Synced Oct 23, 2026, 9:00 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Diurnal Variation of Tear Meniscus and Tear Osmolarity

NCT01206244
View directory record Official record
Conditions
Dry Eye
Interventions
Not listed
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 13, 2013 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Phase 1 Interventional

Sleep Enhancement Training Study for Experienced Shiftworkers

NCT00786357
View directory record Official record
Conditions
Shift-Work Sleep Disorder
Interventions
NIOSH shiftwork booklet, Sleep Enhancement Training System
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
40 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 23, 2010 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Phase 1 Interventional

Sleep Enhancement Training Study for Novice Shiftworkers

NCT00786266
View directory record Official record
Conditions
Shift-Work Sleep Disorder
Interventions
Sleep Enhancement Training System, NIOSH shiftwork booklet
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 23, 2010 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Circadian Rhythms and Sleep-Wake Cycles in Parkinson's Disease

NCT01742182
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Light exposure
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
55 Years to 85 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 18, 2020 · Synced Oct 23, 2026, 9:00 PM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Evaluating the Efficacy and Safety of PROSOMNIA Sleep Therapy™ in Patients With Sleep Deprivation and Chronic Insomnia

NCT06644573
View directory record Official record
Conditions
Chronic Insomnia, Sleep Deprivation, REM Behavior Disorder, REM Sleep Behavior Disorder, REM Sleep Measurement, Insomnia, Insomnia Related to Specified Disorder, Insomnia Due to Other Mental Disorder, Insomnia Comorbid to Psychiatric Disorder, Insomnia Due to Anxiety and Fear, Insomnia Related to Another Mental Condition, Insomnia Disorders, Idiopathic Hypersomnia, Sleep Disorders, Circadian Rhythm, Post Trauma Nightmares, PTSD - Post Traumatic Stress Disorder, Sleep Quality, Anesthesia, Anxiety, Depression, Mental Health, Alzheimer Disease or Associated Disorder, Parkinsons, Circadian Rhythm, Circadian Dysregulation, PTSD, Post-Traumatic, Post-Traumatic Stress Disorder Complex, Military Combat Stress Reaction, Sleep, Military Activity, Veterans, Shift Work Sleep Disorder, Menopause Related Conditions, Pain, Cancer Pain, Athletes
Interventions
PROSOMNIA Sleep Therapy™ (PSTx), Anesthesia-Induced Sleep Therapy, Diprivan (propofol), Astra-Zeneca, Continuous EEG Monitoring
Procedure · Drug · Device
Lead sponsor
Nyree Penn
Industry
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Aventura, Florida
Source: ClinicalTrials.gov public record
Updated May 28, 2025 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Phase 2 Interventional

Effects of Hydrocortisone, Melatonin, and Placebo on Jet Lag

NCT00097474
View directory record Official record
Conditions
Jet Lag
Interventions
Hydrocortisone, Melatonin, Placebo
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tech4Rest Trial With Team Truck Drivers

NCT03108599
View directory record Official record
Conditions
Sleep, Sleep Disturbance, Sleep Disorder, Shift Work, Health Knowledge, Attitudes, Practice, Health Behavior, Fatigue, Vibration; Exposure
Interventions
Enhanced Cab, Fit4Sleep
Other · Behavioral
Lead sponsor
Oregon Health and Science University
Other
Eligibility
21 Years and older
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 25, 2024 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Light Exposure Tracker Designed to Improve Circadian Rhythms - Aim 1

NCT06356337
View directory record Official record
Conditions
Alzheimer's Disease, Mild Cognitive Impairment
Interventions
Light goggles, Daily reminder test message
Device · Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
55 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Menands, New York
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional

Systematic Light Exposure for Fatigue in Breast Cancer Patients

NCT03217201
View directory record Official record
Conditions
Cancer-related Problem/Condition, Fatigue, Circadian Rhythm Disorders
Interventions
Light Glasses (Experimental), Light Glasses (Comparison)
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older · Female only
Enrollment
194 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
3
States / cities
Duarte, California • New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 23, 2023 · Synced Oct 23, 2026, 9:00 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Sleep Profiles in REM Sleep Behavior Disorder

NCT04886076
View directory record Official record
Conditions
Rapid Eye Movement Sleep Behavior Disorder
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
40 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Oct 23, 2026, 9:00 PM EDT
Suspended No phase listed Observational Accepts healthy volunteers

Restoring Molecular Circadian Rhythm

NCT04086589
View directory record Official record
Conditions
Healthy Young, Healthy Elderly
Interventions
Observational study without intervention
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
20 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 23, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Active, not recruiting Not applicable Interventional Results available

Effect of Time-restricted Eating on Catecholamine-sensitivity of Adipose Tissue in Obese Adults

NCT04916730
View directory record Official record
Conditions
Obesity
Interventions
Standard of Care, Time Restricted Eating
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 19, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparison of Time-Restricted Feeding Versus Grazing

NCT01895179
View directory record Official record
Conditions
Prediabetes, Insulin Resistance, Vascular Diseases
Interventions
Time-Restricted Feeding, Grazing
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
35 Years to 70 Years · Male only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 16, 2018 · Synced Oct 23, 2026, 9:00 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

TREAD: Time Restricted Eating Intervention for Alzheimer's Disease

NCT06548191
View directory record Official record
Conditions
Mild Cognitive Impairment, Alzheimer Disease, Alzheimer's Disease
Interventions
Time-restricted eating
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
60 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Impact of Circadian Misalignment on Colonic Barrier Homeostasis in Ulcerative Colitis

NCT05180279
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
7-day sleep lab
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 50 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 19, 2025 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Experimental Manipulation of Sleep and Circadian Rhythms and the Role Played on Reward Function in Teens

NCT04792697
View directory record Official record
Conditions
Delayed Sleep Phase Syndrome
Interventions
Increase morning bright light, Decrease evening blue light, Sleep Scheduling, Monitor sleep, mood, and substance use
Other · Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
13 Years to 15 Years
Enrollment
115 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Oct 23, 2026, 9:00 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Facilitating Adjustment to Simulated Jet Lag

NCT05382923
View directory record Official record
Conditions
Circadian Rhythm Sleep Disorder, Jet Lag Type
Interventions
Bright Light, Bright Light + Exercise + Melatonin, Control
Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 45 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated May 19, 2022 · Synced Oct 23, 2026, 9:00 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

The Nuvigil and Provigil Pregnancy Registry

NCT01792583
View directory record Official record
Conditions
Narcolepsy, Obstructive Sleep Apnea, Shift Work Sleep Disorder
Interventions
Modafinil/armodafinil
Drug
Lead sponsor
Cephalon, Inc.
Industry
Eligibility
Female only
Enrollment
191 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2023
U.S. locations
1
States / cities
West Chester, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 5, 2024 · Synced Oct 23, 2026, 9:00 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Clinical Trial of Propranolol for Seasonal Affective Disorder

NCT00016666
View directory record Official record
Conditions
Seasonal Affective Disorder, Healthy
Interventions
Propranolol
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 50 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 23, 2026, 9:00 PM EDT