- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03484858
The Effects of Exercise on Glycaemic Response of Low or High Glycaemic Index Meals
March 26, 2018 updated by: JeyaKumar Henry, Clinical Nutrition Research Centre, Singapore
The aim of the current study is to determine the effect of sprint interval training (SIT) in conjunction with either high or low glycaemic index meals (breakfast, lunch and dinner) on the 24-hour glycaemic profile and glucoregulatory hormones in Asian males.
Study Overview
Status
Completed
Conditions
Detailed Description
The study will recruit 20 young healthy Asian men of Chinese descent.
Subjects will visit our Clinical Nutrition Research Centre (CNRC) on 5 occasions: once for consenting, screening and familiarization with the exercise and testing equipment (screening), and four additional times, interspaced by a minimum of 3 days, to undergo a total of four study conditions.
The four study trials combine SIT or rest and low or high GI diet in a 2 x 2 design, and will be assigned in randomized order: (RL) Rest and low GI, (SL) SIT and low GI, (RH) Rest and high GI, and (SH) SIT and high GI.
The test conditions will have comparable foods with RL and SL diets comprising local foods of low glycaemic index and RH and SH diets comprising local foods of high glycaemic index.
Randomization of study trials will be carried out using an online randomizer (www.randomizer.org/).
In the SL and SH trials, subjects will perform a SIT bout consisting of alternating periods of low-resistance cycling (4 ½ minutes) and maximal effort all out cycling (30 sec Wingate test) for a total of 30 min (i.e. a total of 6 Wingate tests)*, whereas in the RL and RH trials, subjects will rest for the equivalent period of time (i.e. 30 min).
For screening, potential subjects will come in the morning after an overnight fast.
After obtaining informed consent, a series of screening tests will be conducted, including questionnaires (general health, physical activity and eating behaviour), anthropometry (height, weight, waist and hip circumference), blood pressure, resting heart rate, fasting blood glucose, HbA1c and body composition by air displacement plethysmography (BodPod, Cosmed, Rome, Italy).
Following enrolment, subjects will undergo assessment of resting metabolic rate (RMR) for 30 minutes using a ventilated hood system (Quark CPET, Cosmed, Rome, Italy).
RMR will be multiplied by a factor of 1.5 to approximate total energy requirement for weight maintenance.
This will allow for tailoring the caloric content of the test meals to each subject's energy requirements.
Thereafter, subjects will eat a small standardized breakfast and they will perform a 30-min SIT session to get familiarized with the exercise and the equipment.
The total time required for screening will be around 2 hours.
After the screening, subjects will be provided with a food diary to record all food intake on Day 1 and an activity diary to record all activities on Days 1 and 2 of the actual study trials (see below).
Although only sedentary subjects will be recruited (=60 min of moderate-intensity exercise weekly), they will also be instructed to refrain from any vigorous activities during the three days before each study trials and throughout its duration.
On Visits 2 to 5 (four experimental trials, in random order): Each of the four study visits will last for approximately 12 hours (spanning over 3 days), during which the following will take place: On Day 1, subjects will come to the Lab at around 4:00 pm to have the continuous glucose monitoring system (CGMS) inserted.
CGMS will be used to measure 24 hour blood glucose concentrations.
The sensor records interstitial blood glucose concentrations every five minutes.
This will involve the insertion of a small sensor under the skin in the abdomen, which will be carried out by using a device that produces minimal pain and discomfort.
After insertion, the stabilizing and calibration procedures will take 2 hours after which the subjects will go home with a standardized dinner to eat at around 7:00pm.
Subjects will have to refrain from eating after 10:30pm and return to the CNRC the following morning (Day 2).On Day 2, subjects will report to the lab at 8:15 am following an overnight fast for the first of the four study conditions.
Upon arrival, an indwelling catheter will be inserted into the antecubital fossa or forearm vein of one arm and will be kept patent.
Blood samples will be obtained after the insertion of the catheter at 8:30 am (time = -30 min).
Between 8:30 am and 9:00 am, subjects will either rest for 30 minutes or perform the SIT bout which will start with 4 ½ minutes of low-resistance cycling followed by 30 seconds of maximum effort, repeated for a total of 6 times*.
During the SIT, subjects' ratings of perceived exertion (RPE) will be measured periodically using the Borg scale.
At 9:00 am, blood samples will be collected (time = 0 min), after which breakfast (low or high GI) will be provided.
After finishing breakfast, at 9:15 am, blood samples will be collected every 10 minutes for the first half hour and every 30 minutes for the remaining 3 hours at 15, 25, 35, 45, 75, 105, 135, 165, and 195 minutes.
Before lunch is served at 12:45pm (time = 225 min), blood will be collected and again after lunch at 1:00 pm (time = 240 min), followed by blood collection every 10 minutes for the first half hour and every 30 minutes for the remaining 3 hours at 250, 260, 270, 300, 330, 360, 390, 420 and 450 minutes.
After the last blood sample is collected at 4:30 pm, the catheter will be removed and the subjects will be discharged from the Lab.
Subjects will be provided with the last test meal of the day (dinner) to eat at home at around 7:00pm.
Throughout the day and at specific times, subjects will complete computerized visual analogue scales (VAS) on hunger and fullness.
Blood samples will be used to measure fasting and postprandial concentrations of glucose and major glucoregulatory hormones like insulin and glucagon.
C-peptide concentrations will be used to provide estimates of insulin secretion with mathematical modelling.
Blood lactate will be determined before and after exercise to verify maximal exercise effort.
On Day 3, subjects will come to the Lab at 8:30 am for final calibration and removal of the CGMS sensor.
Subjects will come to the Lab for visits 3, 4, and 5 to perform the other 3 experimental trials, with at least 3 days wash-out in-between visits.
Study Type
Interventional
Enrollment (Actual)
16
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
-
-
-
Singapore, Singapore, 117599
- Clinical Nutrition Research Centre
-
-
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
21 years to 40 years (Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
Male
Description
Inclusion Criteria:
- Male
- Age between 21-40 years
- Chinese Ethnicity
- Body mass index between 17 - 25 kg m2
- Fasting blood glucose (< 6 mmol/L)
- Normal blood pressure (< 140/90 mmHg)
- Do not have metabolic diseases (such as diabetes, hypertension etc.)
- Do not have glucose-6-phosphate dehydrogenase (G6PD) deficiency
- Do not take prescription medication that may affect metabolism
- Low activity level (≤ 60 min of moderate-intensity exercise weekly)
- Do not intentionally restrict food intake
- Do not have intolerances or allergies to test foods
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: Other
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: High glycaemic index meal and exercise
|
|
Other: High glycaemic index meal and rest
|
|
Other: Low glycaemic index meal and exercise
|
|
Other: Low glycaemic index meal and rest
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Glycaemic response
Time Frame: up to 24 hours
|
Measured using continuous glucose monitoring system
|
up to 24 hours
|
Glycaemic response
Time Frame: up to 8 hours
|
Venous blood obtained through cannula, analysed using COBAS Analyzer
|
up to 8 hours
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Blood biochemistry
Time Frame: up to 8 hours
|
Measure of plasma insulin, triglyceride, C-peptide, non-esterified fatty acid (NEFA) and lactate.
|
up to 8 hours
|
Hunger and satiety
Time Frame: up to 8 hours
|
Assessed using Visual Analogue Scale (VAS)
|
up to 8 hours
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
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
December 17, 2015
Primary Completion (Actual)
March 1, 2018
Study Completion (Actual)
March 1, 2018
Study Registration Dates
First Submitted
March 26, 2018
First Submitted That Met QC Criteria
March 26, 2018
First Posted (Actual)
April 2, 2018
Study Record Updates
Last Update Posted (Actual)
April 2, 2018
Last Update Submitted That Met QC Criteria
March 26, 2018
Last Verified
March 1, 2018
More Information
Terms related to this study
Other Study ID Numbers
- 2015/01092
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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