- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05464342
Integral Physiological Adaptations to Carbohydrate Periodization (IPACP)
June 2, 2023 updated by: Giorgos K. Sakkas, University of Thessaly
The purpose of this study is to examine the effect of long-term carbohydrate periodization protocols on sleep architecture, sleep quality, daytime sleepiness, physical performance, body composition, gut microbiome, and miRNA in healthy trained individuals.
Study Overview
Status
Completed
Detailed Description
Athletic populations have been particularly susceptible to sleep inadequacies, experience several sleep issues, and fall below the age-specific sleep recommendations.
However, it is well demonstrated that exercise does not impair sleep by itself, and furthermore, acute post-exercise nutrition could elevate the exercise-induced sleep-optimizing effect, with further benefits for the next physical performance.
In line with these findings, in a metanalysis of clinical trials, it was shown that pre-bed carbohydrate availability resulted in significant alterations in sleep architecture.
It is of utmost importance to highlight that throughout this metanalysis, it was revealed that no long-term nutrition intervention for sleep optimization has been studied yet.
These data raise the question of whether a long-term carbohydrate periodization protocol could optimize sleep and alter gut function in a way that athletic performance will be also enhanced.
This would allow elucidating further potential interrelations and biological pathways underlying these adaptations.
Study Type
Interventional
Enrollment (Actual)
45
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.
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
18 years to 50 years (Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Both sexes, Age between 18 and 50 yrs old, Regularly participating in sports activities.
Exclusion Criteria:
- Any kind of history of major diseases or medication, Excessive amounts of alcohol and caffeine consumption
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: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Evening LGI Carbohydrate Consumption
Dietary Intervention: Consumption of Low Glyceamic Index (LGI) carbohydrates intake post-workout/evening.
|
Participants will receive in the evening food with low glycemic index
|
Experimental: Evening HGI Carbohydrate Consumption
Dietary Intervention: Consumption of High Glyceamic Index (HGI) carbohydrates intake post-workout/evening.
|
Participants will receive in the evening food with high glycemic index
|
Experimental: Evening NO-CHO Carbohydrate Consumption
Dietary Intervention: No consumption of carbohydrates intake post-workout/evening.
|
Participants will receive in the evening a meal with no carbohydrates at all.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Sleep Efficiency
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes sleep efficiency assessed by the gold-standard method of polysomnography.
Sleep efficiency is the percentage of time spent asleep while in bed.
It is calculated by dividing the amount of time spent asleep (in minutes) by the total amount of time in bed (in minutes).
A normal sleep efficiency is considered to be 85% or higher.
|
Assessed at 0-month (pre) and at 1-month (post)
|
Quality of Sleep Score
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in Quality of Sleep will be assessed by the Pittsburgh Sleep Quality Index.
The Pittsburgh Sleep Quality Index (PSQI) is a self-report questionnaire that assesses sleep quality over a 1-month time interval.
The measure consists of 19 individual items, creating 7 components that produce one global score.
The sleep component scores are summed to yield a total score ranging from 0 to 21 with the higher total score (referred to as the global score) indicating worse sleep quality.
|
Assessed at 0-month (pre) and at 1-month (post)
|
Daytime Sleepiness
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in Daytime sleepiness will be assessed by Epworth Sleepiness Scale (ESS).
The Epworth Sleepiness Scale (ESS) measures the general level of daytime sleepiness.
It is a subjective scale that asks the respondent to rate his or her propensity to doze or fall asleep during 8 common daily activities to determine the level of daytime sleepiness.
The score varies between 0-24 with 0-5 Lower Normal Daytime Sleepiness, 6-10 Higher Normal Daytime Sleepiness, 11-12 Mild Excessive Daytime Sleepiness, 13-15 Moderate Excessive Daytime Sleepiness, 16-24 Severe Excessive Daytime Sleepiness.
|
Assessed at 0-month (pre) and at 1-month (post)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Body Composition
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in Body composition.
The changes in body composition will be assessed by the skinfold measurements and BIA
|
Assessed at 0-month (pre) and at 1-month (post)
|
Exercise Performance
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in Exercise Performance will be assessed by a VO2max test.
A VO2 max test is a maximal exercise test performed on a treadmill or bike while connected to a machine capable of analyzing your expired air.
Your test provides data on how much oxygen you use as you exercise and determines the maximal oxygen you can consume during exercise.
|
Assessed at 0-month (pre) and at 1-month (post)
|
Gut Microbiome
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in Gut Microbiome.
Participants' gut microbiome will be studied by analyzing stool samples DNA will be extracted, and the presence of selected gut bacterial populations will be examined qualitatively and quantitatively using specific primers and quantitative Real-Time PCR.
|
Assessed at 0-month (pre) and at 1-month (post)
|
miRNA levels
Time Frame: Assessed at 0-month (pre) and at 1-month (post)
|
Changes in miRNA levels.
miRNA levels that are associated with hypertrophy or cardiovascular function will be analyzed by blood sample collection at baseline and at one month.
|
Assessed at 0-month (pre) and at 1-month (post)
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Study Chair: Georgios Sakkas, PhD, University of Thessaly
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)
July 5, 2022
Primary Completion (Actual)
April 1, 2023
Study Completion (Actual)
May 31, 2023
Study Registration Dates
First Submitted
July 4, 2022
First Submitted That Met QC Criteria
July 14, 2022
First Posted (Actual)
July 19, 2022
Study Record Updates
Last Update Posted (Actual)
June 5, 2023
Last Update Submitted That Met QC Criteria
June 2, 2023
Last Verified
June 1, 2023
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- EEBK/EΠ/2018/10
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
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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