Clinical Trials Logo

Clinical Trial Summary

The aim of this study is to examine the neurobehavioural and glucose metabolic responses to two successive cycles of sleep restriction and recovery in adolescents, and to determine the benefits of napping on cognitive performance, alertness, mood and glucose metabolism. Using a split-sleep design, 60 participants, aged 15 to 19 years old, are divided into a nap and a no-nap group. Both groups undergo two cycles of sleep restriction and recovery over a period of 15 days. The no-nap group receives a 6.5-hour sleep opportunity on sleep restriction nights, with no daytime nap opportunity. The nap group receives a 5-hour sleep opportunity on sleep restriction nights, and has a 1.5-hour nap opportunity the following afternoon.


Clinical Trial Description

The present study investigates whether a continuous stretch of night time sleep (6.5 hours) will lead to better neurobehavioural outcomes relative to nocturnal sleep restriction (5 hours) and daytime nap (1.5 hours) of the same total duration, and how sleep restriction affects glucose metabolism. The 15-day protocol is conducted in a dormitory on 60 high school students, aged 15 to 19 years old. Participants are assigned to a nap or no-nap group. Both groups start with two 9-hour adaptation and baseline nights, followed by two successive cycles of sleep restriction (5-h time in bed (TIB); 01:00-06:00 or 6.5-h TIB; 00:15-06:45) and recovery (9-h TIB; 23:00-08:00). Following each sleep-restricted night, the nap group receives a 1.5-h nap opportunity, while participants in the no-nap group watch a documentary. Throughout the protocol, sleep-wake patterns are assessed with actigraphy and polysomnography. Sleepiness levels, mood, vigilance, working memory / executive functions, and speed of processing are assessed 3 times daily (10:00, 16:15, and 20:00). Other cognitive functions such as memory and mindfulness levels are investigated through computer-based tasks. Glucose metabolism is measured using oral glucose tolerance tests in the mornings after the second baseline night, the third night of sleep restriction and second recovery night in the first cycle, as well as the last sleep restriction night in the second cycle.

All participants stay in air-conditioned, twin-share bedrooms with en-suite bathrooms. Bedroom windows are fitted with blackout panels to ensure participants are not woken up prematurely by sunlight. Earplugs are provided, and participants are allowed to adjust the temperature of their bedrooms to their personal comfort. Three main meals are served each day, with snacks being provided for upon request. Caffeinated drinks, unscheduled sleep, and strenuous physical activities are prohibited.

Outside of scheduled sleep, meal, and cognitive testing times, participants spend the majority of their free time in a common room that is illuminated by natural and artificial lighting. They are allowed to read, play non-physically exerting games, watch videos, and interact with research staff and other participants. Participants are under constant supervision by the research staff. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03333512
Study type Interventional
Source Duke-NUS Graduate Medical School
Contact
Status Completed
Phase N/A
Start date November 28, 2017
Completion date January 20, 2018

See also
  Status Clinical Trial Phase
Completed NCT04044495 - Sleep, Rhythms and Risk of Alzheimer's Disease N/A
Recruiting NCT06079853 - Nurse Suicide: Physiologic Sleep Health Promotion Trial N/A
Completed NCT05017974 - Research on Improving Sleep During Pregnancy N/A
Recruiting NCT05206747 - Ottawa Sunglasses at Night for Mania Study N/A
Enrolling by invitation NCT04253054 - Chinese Multi-provincial Cohort Study-Beijing Project
Completed NCT04513743 - Ultra Long-Term Sleep Monitoring Using UNEEG™ Medical 24/7 EEG™ SubQ N/A
Completed NCT03251274 - Bath Machine on Sleep Quality in Nursing Home N/A
Completed NCT04102345 - Lavender vs Zolpidem Sleep Quality During Diagnostic PSG Early Phase 1
Completed NCT03725943 - Comparison of Dreem to Clinical PSG for Sleep Monitoring in Healthy Adults N/A
Active, not recruiting NCT05062161 - Sleep Duration and Blood Pressure During Sleep N/A
Completed NCT04562181 - Consistency Evaluation of the qCON, qNOX Indices and Bispectral Index N/A
Completed NCT05576844 - Ai Youmian (Love Better Sleep) for People Living With HIV N/A
Completed NCT05102565 - A Dyadic Telehealth Program for Alzheimer's Patients/Caregivers N/A
Completed NCT04688099 - Synovial Fluid Sleep Study
Recruiting NCT04171245 - Prescribing Laughter for Sleep and Wellbeing in UAE University Students N/A
Completed NCT03758768 - The Effects of a Blue Monochromatic Light Intervention on Evening-type Individuals' Sleep and Circadian Rhythms N/A
Completed NCT03163498 - Evaluation of Sleep Pattern and Mood Profile in Hypertensive Patients
Completed NCT04093271 - Investigating the Efficacy of Rest-ZZZ Formula in Healthy Participants With Difficulty Falling Asleep or Staying a Sleep Phase 1
Completed NCT03673397 - The Acute Effect of Aerobic Exercise on Sleep in Patients With Depression N/A
Completed NCT04120363 - Trial of Testosterone Undecanoate for Optimizing Performance During Military Operations Phase 4