The Acute Effect of Physical Activity on Postprandial Blood Glucose in Pregnant Women

April 20, 2021 updated by: University of Aarhus

The aim of the project is to investigate the acute effect of exercise on blood glucose after food consumption. Thereby the investigators wish to achieve knowledge that can improve prevention and treatment of gestational overweight and gestational diabetes mellitus (GDM). This will prevent serious complications during pregnancy and birth, but also long term complications like type 2 diabetes mellitus (T2DM) for both the mother and the offspring.

Inclusion will be 60 pregnant women divided into three groups - normal weight, overweight and obese and women with gestational diabetes. Participants will receive a fixed diet and go through an intervention period with physical activity immediately after each main meal and a control period with inactivity after the meals. Blood glucose will be the main outcome.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Design: Crossover controlled study. Cases: 60 pregnant women recruited at the Department of Obstetrics and Gynecology, Aarhus University Hospital (AUH). Subjects will receive both written and oral information before entering the trial. According to their prepregnancy BMI, subjects will be recruited for three different groups: i) normal weight (BMI 18,5-24,9), ii) overweight and obese (BMI ≥ 25) and iii) GDM. 20 women in each group. Group i and ii will be recruited at the routine ultrasound scan at gestational week 19. Group iii will be recruited after the Oral Glucose Tolerance Test (OGTT) that diagnoses gestational diabetes mellitus. The routine OGTT is done at gestational week 28. When diagnosed with GDM the women are referred to Department of Obstetrics and Gynecology, AUH, and the investigators will recruit participants from here. Participants will be examined during gestational week 30-34 where insulin resistance peaks during pregnancy.

Intervention: Participants will receive a fixed diet for a total of 8 days. The 8 days of fixed diet are split into a 4 days intervention period and a 4 days control period separated by two days of regular food intake. The two days of regular food intake will function as a "wash out period" to avoid carry over effect. During the 4 days intervention period the participants will perform 30 minutes of interval walking immediately after each main meal. The interval walking consists of alternating fast and slow intervals (3 minutes each) aiming at > 70% and < 40% of peak energy expenditure measured by the Sensewear Armband. During the 4 days control period the participants will be normally active, not performing any set physical activity. Participants will be randomized to the order of the two periods.

Study variables: Fasting blood samples will be taken on the first day of both the intervention and control period and on the morning after the last day of each period. Blood samples will be analyzed for blood glucose, HbA1c, C-peptide and lipid profile (triglycerides, HDL and LDL).

During the entire experimental period, movement data will be collected using the Sensewear Armband. Blood glucose will be monitored continuously using the IPro2 Continuous Glucose Monitor (CGM) from Medtronic.

The diet will consist of three main meals and three snacks and will be calculated to match their metabolic need. The calculations will be done by a nutrition specialist and will include weight, height, BMI and energy need during 3rd trimester pregnancy.

Data on demography, family history of diabetes, prepregnancy BMI, gestational weight gain and complications during pregnancy are collected from medical records of the patients and their offspring.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
18

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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

  • Denmark
      • Aarhus, Denmark, 8200
        • Department of Obstetrics and Gynecology, Aarhus University Hospital

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Pregnant women over age of 18
  • according to each group: BMI: 18,5-24,9; BMI: >25; women with GDM.

Exclusion Criteria:

  • women with a physical disability that affects their movement will be excluded from the study

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
  • Masking: NONE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
EXPERIMENTAL: Experimental intervention
Fixed diet and physical activity.
Behavioral: Physical activity
Interval walking performed after each main meal.
Other: Fixed diet.
Participants will receive a fixed diet through out the intervention period and control period.
OTHER: Control intervention
Fixed diet and inactivity.
Other: Fixed diet.
Participants will receive a fixed diet through out the intervention period and control period.
Behavioral: Inactivity
Inactivity after each main meal.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Blood glucose
Time Frame: Through intervention periods of 4 days.
Differences in blood glucose between experimental intervention (physical activity) and control intervention (inactivity).
Through intervention periods of 4 days.

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Aarhus

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Per Ovesen, MD, Prof., Aarhus University Hospital / University of Aarhus

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 (ACTUAL)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 3, 2018

Primary Completion (ACTUAL)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 31, 2021

Study Completion (ACTUAL)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 31, 2021

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 9, 2018

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 20, 2018

First Posted (ACTUAL)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 21, 2018

Study Record Updates

Last Update Posted (ACTUAL)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 21, 2021

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 20, 2021

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Diet study

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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