Effect of Continuous vs Intermittent Aerobic Exercise on Glycemic Control in a Barbadian Population With Type 2 Diabetes

July 1, 2019 updated by: Kristyn Kirton, Springfield College

The Effect of Continuous Versus Intermittent Aerobic Exercise on Glycemic Control in a Barbadian Population With Type 2 Diabetes - A Crossover Randomized Control Trial

The purpose of this study will be to evaluate and compare the effect of a single 30-minute bout of moderate intensity aerobic exercise to the effect of three 10-minute pre-prandial bouts of energy-matched and volume-matched aerobic exercise on 2-hr post prandial and fasting blood sugar levels, in a sample of type 2 diabetes patients, aged 30-65 years, living in Barbados

Research Hypotheses:

The three bouts of pre-prandial moderate intensity aerobic exercise will result in lower post prandial blood sugar levels when compared to the single bout of moderate intensity aerobic exercise.

The three bouts of pre-prandial moderate intensity aerobic exercise will result in lower fasting blood sugar levels on the morning following the exercise intervention when compared to the single bout of moderate intensity aerobic exercise

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

With the background that there is increasing evidence that breaking up sedentary time with physical activity may be potentially associated with improved blood glucose levels (Francois et al., (2014) & van Dijk et al., (2013), this study aims to investigate and compare the effect of a single 30-minute bout of moderate intensity aerobic exercise to the effect of three 10-minute pre-prandial bouts of energy-matched and volume-matched aerobic exercise on 2-hr post prandial and fasting blood sugar levels in a sample of type 2 diabetes patients.

Different from previous studies, this research seeks to evaluate these effects in a Black Caribbean population, in a type 2 diabetes population on medication including insulin and also seeks to evaluate if either exercise regimen is indeed palatable to the target population by evaluating treatment acceptability.

The proposed study will be a crossover randomized controlled study. There will be two intervention groups - a single 30-minute bout of moderate intensity aerobic exercise before breakfast and three (3) 10-minute bouts of moderate intensity aerobic activity before breakfast, lunch and dinner. The primary outcome measure will be 2-hr post prandial blood sugar levels and fasting blood sugar levels on the day following the intervention. Neither subject nor investigator will be blinded to the intervention.

Subjects will include patients with a documented diagnosis of type 2 diabetes, that is a documented HbA1C ≥ 6.5%. Baseline data will include body mass and body composition and will be measured using the bioelectrical impedance technique (Tanita scale). Waist circumference will be assessed using a Gulick tape measure. Baseline sedentary behaviour and physical activity level will be assessed using the validated International Physical Activity Questionnaire.

All recruited subjects will be asked to complete two exercise interventions separated by a one-week washout period: 1) a single 30-minute bout of moderate intensity aerobic exercise before breakfast and 2) three (3) 10-minute bouts of moderate intensity aerobic activity before breakfast, lunch and dinner. Each subject will be randomized to one of two treatment sequences: single bout followed by multiple bouts (S-M) or multiple bouts followed by single bout (M-S). The randomization will be done using online statistical computing web programming (www.randomization.com) to generate a randomization schedule with balanced permutations.

Timing between exercise completion and commencement of meal intake will be approximately 15 minutes. A heart rate reserve range of 40-59% will be used to define moderate intensity. Heart rate will be measured using a validated Polar heart rate monitor. Rate of perceived exertion will be a secondary measure of exercise intensity.

Two-hour (2hr) post prandial blood sugar levels and fasting blood sugar levels on the day following the exercise intervention will be measured using a validated capillary blood glucose meter. Blood pressure will also be measured at the same times that blood glucose values are taken using a validated automated blood pressure machine.

Standardized meals of fixed nutrient content and individualized to the subject's calculated estimated daily caloric requirements will be provided to subjects on the day of the exercise interventions. Treatment acceptability will be assessed following each exercise intervention using an expert-designed questionnaire that will be piloted in this study.

Study Type

Interventional

Enrollment (Anticipated)

30

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

30 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Adults aged 30-65 years
  • Documented diagnosis of type 2 diabetes (HbA1C ≥ 6.5%)

Exclusion Criteria:

  • Subjects currently managed on prandial insulin
  • Subjects who have recently started insulin (within the previous month)
  • Subjects with a history of frequent hypoglycemic episodes within the previous 2 weeks,
  • Pregnancy
  • Subjects with a history of cerebrovascular accident, myocardial infarction, chronic kidney disease, autonomic and peripheral neuropathy
  • Subjects with contraindications to exercise according to ACSM 2018 guidelines

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Single Bout ('S') - 30 minutes of moderate intensity cycling
Subjects will perform a single 30-minute bout of moderate intensity cycling before breakfast
Behavioral: Single Bout ('S')
Each subject will perform a single bout of 30-minutes of moderate-intensity cycling before breakfast
Experimental: Multiple Bout ('M')
Subjects will perform three (3) 10-minute bouts of moderate intensity cycling before breakfast, lunch and dinner
Behavioral: Multiple Bout ('M')
Each subject will perform three (3) 10-minute bouts of moderate intensity cycling before breakfast, lunch and dinner

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
2 hour post prandial blood glucose level after breakfast
Time Frame: single point measurement taken 2 hours after breakfast consumption
blood glucose level 2 hours after breakfast consumption
single point measurement taken 2 hours after breakfast consumption
2 hour post prandial blood glucose level after lunch
Time Frame: single point measurement taken 2 hours after lunch consumption
blood glucose level 2 hours after lunch consumption
single point measurement taken 2 hours after lunch consumption
2 hour post prandial blood glucose level after dinner
Time Frame: single point measurement taken 2 hours after dinner consumption
blood glucose level 2 hours after dinner consumption
single point measurement taken 2 hours after dinner consumption
Fasting blood sugar level
Time Frame: single point measurement taken after 8 hours of fasting
blood sugar level after 8 hours of fasting performed on day following exercise intervention
single point measurement taken after 8 hours of fasting

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Springfield College

Investigators

  • Study Chair: Samuel Headley, PhD, Springfield College

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Anticipated)

July 1, 2019

Primary Completion (Anticipated)

February 1, 2020

Study Completion (Anticipated)

April 1, 2020

Study Registration Dates

First Submitted

June 29, 2019

First Submitted That Met QC Criteria

July 1, 2019

First Posted (Actual)

July 5, 2019

Study Record Updates

Last Update Posted (Actual)

July 5, 2019

Last Update Submitted That Met QC Criteria

July 1, 2019

Last Verified

July 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KCK00000001

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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