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Showing 1–24 of 76 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: NAP Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Longitudinal Investigation of Sleep, Memory, and Brain Development Across the Nap Transition

NCT06351098
View directory record Official record
Conditions
Memory
Interventions
nap
Behavioral
Lead sponsor
University of Maryland, College Park
Other
Eligibility
36 Months to 60 Months
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
2
States / cities
College Park, Maryland • Amherst, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Sleep Length and Circadian Regulation in Humans

NCT00843843
View directory record Official record
Conditions
Sleep Disorders
Interventions
Bright light box
Device
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 45 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 7, 2016 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility of Insomnia Tracking and Treatment in IBD

NCT04132024
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Insomnia
Interventions
Cognitive Behavioral Therapy for Insomnia (CBT-I)
Behavioral
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
Not listed
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated May 10, 2021 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Impact of Reactivation During Sleep on the Consolidation of Abstract Information in Humans

NCT05746299
View directory record Official record
Conditions
Memory Consolidation
Interventions
Congruent vs. Incongruent, Immediate vs. Awake vs. Asleep, Targeted memory reactivation (TMR)
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 35 Years
Enrollment
194 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 13, 2025 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Pilot Study Evaluating Go NAP SACC's Web-based Nutrition Tool for Child Care

NCT02889198
View directory record Official record
Conditions
Environment Related Disease
Interventions
Go NAP SACC
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2017 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Bioequivalence Study Comparing Organic Phosphate (Sodium Glycerophosphate Injection) to Inorganic Phosphate (Sodium Phosphates Injection, USP)

NCT06842121
View directory record Official record
Conditions
Parenteral Nutrition
Interventions
Sodium Glycerophosphate Injection, Sodium Phosphates Injection
Drug
Lead sponsor
Baxter Healthcare Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 28, 2025 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Phase 3 Interventional Results available

Withdrawal Study to Demonstrate the Maintenance Effect in the Treatment of Non-24-Hour Sleep-Wake Disorder

NCT01430754
View directory record Official record
Conditions
Non-24-Hour Sleep-Wake Disorder
Interventions
tasimelteon, Placebo
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
22
States / cities
Phoenix, Arizona • Orange, California • Palo Alto, California + 19 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2014 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fire Fighter Fatigue Management Program: Operation Fight Fatigue

NCT01672502
View directory record Official record
Conditions
Shift-Work Sleep Disorder, Insomnia, Restless Leg Syndrome, Obstructive Sleep Apnea, Impaired Driving
Interventions
Sleep health education provided via a web-based program, Sleep disorder detection and treatment, Optimization of Sleep in Fire Station
Behavioral · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
620 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 16, 2016 · Synced Sep 3, 2026, 11:18 AM EDT
Not listed Not applicable Interventional

Investigating How Sleep After Training Can Affect the Learning of a Motor Skill in Individuals With Brain Injury

NCT04810442
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Nap
Other
Lead sponsor
Kessler Foundation
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Mar 22, 2021 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Intra-Shift Napping on EMS Cardiovascular Health

NCT04469803
View directory record Official record
Conditions
Blood Pressure, Heart Rate Variability
Interventions
Intra-Shift Napping
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 100 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 3, 2026, 11:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Function of Biphasic Sleep in Infants

NCT06399939
View directory record Official record
Conditions
Sleep Deprivation
Interventions
Nap, Wake
Behavioral
Lead sponsor
University of Massachusetts, Amherst
Other
Eligibility
9 Months to 15 Months
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2029
U.S. locations
1
States / cities
Amherst, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 7, 2024 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Rapid Eye Movement Restoration and Enhancement for Sleep-deprived Trauma-adaptation

NCT06547086
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Transcranial electrical stimulation with Temporal Interference (TES-TI)
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 50 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Learning of New Structured Information Across Time and Sleep

NCT05910762
View directory record Official record
Conditions
Learning, Humans, Consolidation, Sleep
Interventions
Associative inference, Category learning, Sleep
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 35 Years
Enrollment
119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Results available

Reducing Cannabis Use for Sleep Among Adults Using Medical Cannabis

NCT03964974
View directory record Official record
Conditions
Insomnia Chronic, Cannabis Use
Interventions
Cognitive Behavioral Therapy for Insomnia in Cannabis Users (CBTi-CB), Sleep Hygiene Education (SHE)
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
21 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 13, 2022 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Night Shift Work, On-shift Napping, and Endothelial Function: A Pilot Study

NCT05436951
View directory record Official record
Conditions
Blood Pressure, Endothelial Dysfunction
Interventions
Brief on-shift nap
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 100 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 7, 2024 · Synced Sep 3, 2026, 11:18 AM EDT
Recruiting Phase 1 Interventional

Regulation of Emotion, Sleep Extension, and mTBI

NCT06883006
View directory record Official record
Conditions
Mild Traumatic Brain Injury
Interventions
Sleep Extension
Behavioral
Lead sponsor
Merrimack College
Other
Eligibility
18 Years to 35 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
North Andover, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Sep 3, 2026, 11:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Power Nap With TES-TI

NCT07090135
View directory record Official record
Conditions
Non-restorative Sleep, Healthy Volunteer
Interventions
Transcranial electrical stimulation with Temporal Interference (TES-TI)
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 75 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Infant Behavioral Sleep Intervention: Comparative Efficacy

NCT03447665
View directory record Official record
Conditions
Insomnia
Interventions
Bedtime routine, Sleep schedule, Intervention (bedtime), Intervention (after night wakings)
Behavioral
Lead sponsor
Indiana University
Other
Eligibility
6 Months to 18 Months
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 17, 2019 · Synced Sep 3, 2026, 11:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Neurobehavioral Changes Following Spaceflight Stressors

NCT07293494
View directory record Official record
Conditions
Stressor, Individual, Alcohol Impairment, Sleep Deprivation, Impairment, Cognitive
Interventions
Alcohol Administration, Sleep Deprivation, Control
Other · Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 60 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Phase 3 Interventional Results available

A Study Comparing the Sodium Picosulfate, Magnesium Oxide and Anhydrous Citric Acid Oral Solution With PREPOPIK® for Colon Cleansing in Preparation for Colonoscopy

NCT03017235
View directory record Official record
Conditions
Bowel Preparation
Interventions
Sodium Picosulfate, Magnesium Oxide and Anhydrous Citric Acid Oral Solution, Sodium Picosulfate, Magnesium Oxide and Anhydrous Citric Powder
Drug
Lead sponsor
Ferring Pharmaceuticals
Industry
Eligibility
18 Years to 80 Years
Enrollment
917 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
12
States / cities
Huntsville, Alabama • Anaheim, California • Chula Vista, California + 9 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Sep 3, 2026, 11:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Baby Nutrition and Physical Activity Self-Assessment for Child Care (NAP SACC) Intervention Study

NCT01890681
View directory record Official record
Conditions
Obesity
Interventions
Baby NAP SACC, Back to Sleep
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
3 Months and older
Enrollment
960 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
3
States / cities
Baltimore, Maryland • Chapel Hill, North Carolina • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 28, 2019 · Synced Sep 3, 2026, 11:18 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Enhancing Memory Consolidation in Older Adults

NCT03657212
View directory record Official record
Conditions
Aging
Interventions
Zolpidem
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
60 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Feb 4, 2025 · Synced Sep 3, 2026, 11:18 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Breath Biomarkers for Sleep Loss and Circadian Timing

NCT03980340
View directory record Official record
Conditions
Shift-Work Sleep Disorder, Shift Work Type Circadian Rhythm Sleep Disorder, Sleep Disorders, Circadian Rhythm, Sleep Disorders, Intrinsic, Advanced Sleep Phase Syndrome (ASPS), Advanced Sleep Phase Syndrome, Advanced Sleep Phase, Delayed Sleep Phase, Delayed Sleep Phase Syndrome, Non-24 Hour Sleep-Wake Disorder, Irregular Sleep-Wake Syndrome
Interventions
Short Nap Intervention, No Nap Intervention
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 2, 2025 · Synced Sep 3, 2026, 11:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Impact of Hyperarousal on Simple and Complex Cognitive Task Performance Among Insomnia Sufferers

NCT02290405
View directory record Official record
Conditions
Insomnia, Primary Insomnia, Chronic Insomnia
Interventions
Multiple Sleep Latency Test (MSLT)
Behavioral
Lead sponsor
Jack Edinger, PhD
Other
Eligibility
21 Years to 80 Years
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Sep 3, 2026, 11:18 AM EDT