- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04679051
Long Sleep Duration and Vascular Function
January 11, 2023 updated by: Joaquin U Gonzales, PhD, Texas Tech University
Effect of Pulsatile Pressure and Long Sleep Duration on Cerebral Vascular Function
Sleep duration has received much attention in recent years due to strong evidence that not enough sleep can increase risk for a number of diseases and disorders.
Research is emerging that too much sleep also has a negative impact on health, particularly higher risk for myocardial infarction and stroke.
The investigators hypothesize that long duration sleep has the ability to impair peripheral and cerebral vascular function in middle-aged to older adults.
Study Overview
Detailed Description
The aim of this study is to compare the effect of long duration sleep (>9 hours) to recommended levels of sleep (7-8 hours) in a crossover designed study requiring adults to maintain each prescribed sleep duration for one week.
Ambulatory brachial and central aortic blood pressure will be measured during sleep, while cerebrovascular reactivity, carotid artery hemodynamics (e.g., flow pulsatility), aortic pulse wave reflections, cognitive function, and peripheral vasodilatory function will be measured before and after each sleep protocol.
A secondary objective of this study is to understand whether aerobic exercise can improve vascular function under conditions of different sleep durations.
This information will shed light upon the impact of sleep parameters on exercise-induced improvements in vascular function.
Study Type
Interventional
Enrollment (Actual)
23
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Texas
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Lubbock, Texas, United States, 79409-3011
- Texas Tech University
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
40 years to 79 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- recreationally active
- reporting no recent history of sleep problems
- not taking sleep-inducing medication
- not diabetic (fasting blood glucose <126 mg/dL)
Exclusion Criteria:
- show symptoms of insomnia
- smoke
- have a personal history of stroke or diabetes
- take birth control pills
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: 8 hours time in bed
Participants will be asked to spend 8 hours time in bed with the aim of achieving one week of normal sleep duration (7 to 8 hours).
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Participants will be asked to alter time in bed to achieve specified sleep durations.
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Experimental: 11 hours time in bed
Participants will be asked to spend 11 hours time in bed with the aim of achieving one week of long duration sleep as defined as 9+ hours of sleep.
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Participants will be asked to alter time in bed to achieve specified sleep durations.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change From Wake in Central Aortic Pulse Pressure After 11 Hours in Bed
Time Frame: One night during each time in bed condition
|
Central aortic pulse pressure was measured one night during the week of 8 hours in bed, then again one night during the week of 11 hours in bed.
Blood pressure was measured using an Oscar2 ambulatory blood pressure device.
The device started recordings one hour prior to sleep and was programmed to take measurements once every 30 minutes during sleep until 10:00pm then every 45 minutes after 10:00pm until participants arose from bed.
The change in central aortic pulse pressure from being awake to being asleep was compared between 8 and 11 hours in bed conditions.
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One night during each time in bed condition
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Change in Cerebral Vascular Reactivity After 11 Hours in Bed
Time Frame: Morning after one week of 8 and 11 hours in bed
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Blood flow measured in the middle cerebral artery during hypercapnia was measured after one week of 8 hours in bed, then again after one week of 11 hours in bed.
Cerebral blood flow was measured using transcranial Doppler during 3 minutes of transient hypercapnia induced by rebreathing.
Cerebral vascular reactivity was considered as the percent increase in cerebral blood flow at the end of 3 minutes of rebreathing relative to the Torr change in end-tidal carbon dioxide (percent change/Torr).
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Morning after one week of 8 and 11 hours in bed
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Change in Peak Reactive Hyperemia After 11 Hours in Bed
Time Frame: Morning after one week of 8 and 11 hours in bed
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Peak forearm blood flow was measured after one week of 8 hours in bed, then again after one week of 11 hours in bed.
Peak reactive hyperemia in the forearm (ml/100ml/min) was measured using venous occlusion plethysmography after 10 minutes of forearm ischemia resulting from blood pressure cuff inflation at the upper-arm.
Peak blood flow was considered the highest blood flow measurement after the blood pressure cuff was deflated.
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Morning after one week of 8 and 11 hours in bed
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Change in Arterial Stiffness After 11 Hours in Bed
Time Frame: Morning after one week of 8 and 11 hours in bed
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Arterial stiffness was measured after one week of 8 hours in bed, then again after one week of 11 hours in bed.
Carotid-femoral pulse wave velocity was used as the measure of arterial stiffness.
Radial arterial tonometry was used to derive a central aortic blood pressure wave.
Wave separation analysis of the aortic pressure wave was then used to calculate pulse wave velocity from transit time and carotid-femoral path length.
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Morning after one week of 8 and 11 hours in bed
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Spatial Orientation After Aerobic Exercise
Time Frame: Baseline and after exercise
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Score from a Manikin test of spatial orientation that participants took using a computer with automated software (Automated Neuropsychological Assessment Metrics, known as ANAM).
Scores reflect "throughput scores" which is a continuous variable that is the ratio of correct answers per minute during the Manikin test.
Higher throughput scores mean better outcome, in this case, better spatial orientation ability.
Participants took the Manikin test after one week of 8 and 11 hours in bed (i.e., baseline) then the morning after one day of aerobic exercise.
Exercise consisted of three sessions of 10 minutes brisk walking at a heart rate considered to be moderate intensity (50-70% of age-predicted maximal heart rate).
Results reported reflect the change in throughput scores after exercise (morning after exercise minus baseline).
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Baseline and after exercise
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Change in Executive Function After Aerobic Exercise
Time Frame: Baseline and after exercise
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Executive function was assessed using a Stroop color-word test that participants took using a computer with automated software (Automated Neuropsychological Assessment Metrics, known as ANAM).
Score reported are number of correct answers.
A higher score means a better outcome, in this case, better executive functioning.
Participants took the Stoop color-word test after one week of 8 and 11 hours in bed (i.e., baseline) then the morning after one day of aerobic exercise.
Exercise consisted of three sessions of 10 minutes brisk walking at a heart rate considered to be moderate intensity (50-70% of age-predicted maximal heart rate).
Results reported reflect the change in score after exercise (morning after exercise minus baseline).
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Baseline and after exercise
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Change in Mental Flexibility After Aerobic Exercise
Time Frame: Baseline and after exercise
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Mental flexibility was assessed using a Switching task that participants took on a computer with automated software (Automated Neuropsychological Assessment Metrics, known as ANAM).
Scores reflect "throughput scores" which is a continuous variable that is the ratio of correct answers per minute during the Manikin test.
Higher throughput scores mean better outcome, in this case, better mental flexibility.
Participants took the Switching task after one week of 8 and 11 hours in bed (i.e., baseline) then the morning after one day of aerobic exercise.
Exercise consisted of three sessions of 10 minutes brisk walking at a heart rate considered to be moderate intensity (50-70% of age-predicted maximal heart rate).
Results reported reflect the change in throughput scores after exercise (morning after exercise minus baseline).
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Baseline and after exercise
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Joaquin U Gonzales, PhD, Texas Tech University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
October 16, 2019
Primary Completion (Actual)
June 30, 2021
Study Completion (Actual)
June 30, 2021
Study Registration Dates
First Submitted
December 11, 2020
First Submitted That Met QC Criteria
December 16, 2020
First Posted (Actual)
December 22, 2020
Study Record Updates
Last Update Posted (Estimate)
January 13, 2023
Last Update Submitted That Met QC Criteria
January 11, 2023
Last Verified
January 1, 2023
More Information
Terms related to this study
Other Study ID Numbers
- 19IPLOI34760579
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Yes
IPD Plan Description
All data collected or generated from the project will be made available on ClinicalTrials.gov
within 12 months from the primary completion date
IPD Sharing Time Frame
All data collected or generated from the project will be made available on ClinicalTrials.gov
within 12 months from the primary completion date.
IPD Sharing Access Criteria
Open access
IPD Sharing Supporting Information Type
- Informed Consent Form (ICF)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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