Breaks in Sedentary Time and Glucose Regulation in Women (ACUTE)

December 9, 2014 updated by: University of Leicester

Does Breaking Sedentary Time Improve Glucose Regulation in Women With Impaired Glucose Tolerance? A Balanced Incomplete Block Design Study

The number of people diagnosed with Type 2 diabetes (T2DM) is increasing rapidly and about 2.9 million people in the UK currently have diabetes. There is increasing evidence suggesting that prolonged sedentary time may actually increase the risk of diabetes and other chronic diseases. Importantly, adults can meet public health guidelines on physical activity (150 minutes of moderate activity per week), but if they still sit for prolonged periods, their metabolic health is compromised. Going from sitting to standing and carrying out light-intensity activities (such as casual walking) may reduce diabetes risk. However, no one has investigated the effect of standing and walking on markers of cardio-metabolic markers in individuals with a high risk of T2DM. Therefore, the aim is to find out whether reducing the amount of time people spend sitting and replacing it with standing and light intensity activity (walking) reduces glucose, insulin and triglyceride levels, therefore reducing the risk of diabetes.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

22

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

  • United Kingdom
    • Leicestershire
      • Leicester, Leicestershire, United Kingdom, LE5 4PW
        • Leicester Diabetes Centre, Leicester General 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

Ages Eligible for Study

50 years to 74 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Sedentary
  • Overweight or obese (BMI>25kg/m2)
  • Post menopausal
  • Previous diagnosis of impaired glucose tolerance

Exclusion Criteria:

  • Regular purposeful exercise (≥150 minutes of MVPA per week)
  • Physical condition which limits full participation in the study
  • Active psychotic illness or other significant illness which, in the view of the investigators, would prevent full participation
  • Inability to communicate in spoken English
  • Steroid use
  • Known Type 2 Diabetes
  • Pregnancy
  • Male
  • Currently taking hormone replacement medication.

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: Sitting
During the sitting treatment condition, walking and standing will be restricted. Participants will be in a designated room with access to a computer, books/magazines throughout the day. Participants will have a cannula fitted and the first of the half-hourly blood samples will be taken (time point: -1hr). Participants will then be asked to sit quietly for 60 minutes to achieve a steady state. Following this, participants will have another blood sample taken and then be provided with a standardised mixed meal breakfast (09:00am) (time point: 0h). Blood sampling will continue at 30 minutes intervals for 3 hours following breakfast. A second, lunch meal (12:00pm), will be then be consumed over 15 minutes. Blood sampling will then continue at 30 minute intervals for 3 hours following lunch.
Behavioral: Sitting
Experimental: Standing
This is the same as the sitting condition, but participants will be asked to break their sitting time by standing close to their chair for 5 minutes, after 15 and 45 minutes of each hour following breakfast. The standing protocol will be repeated after lunch. Individuals will be asked to stand in the same position with no further instructions provided. In total, individuals will accumulate 12 bouts (60 minutes) of standing throughout the test period.
Behavioral: Standing
Experimental: Walking
This is identical to the standing condition, but the breaks in sitting time will be punctuated with 5 minute bouts of light-intensity treadmill walking (equivalent to around 4.0km•h-1) rather than standing. In total, individuals will accumulate 12 bouts (60 minutes) of light-intensity activity throughout the test period. The light-intensity walking activity undertaken here replicates the low-grade ambulatory activity associated with everyday life.
Behavioral: Walking

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Glucose area under the curve
Time Frame: 0 weeks and 2 weeks
Glucose area under the curve (AUC); Plasma glucose will be measured using a glucose oxidase method on the Beckman Auto Analyzer (Beckman, High Wycombe, UK). Glucose profile measurements will be undertaken in the same laboratory located within the Leicester Royal Infirmary.
0 weeks and 2 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Insulin area under the curve
Time Frame: 0 weeks and 2 weeks
0 weeks and 2 weeks
Triacylglycerol area under the curve
Time Frame: 0 weeks and 2 weeks
0 weeks and 2 weeks
Lipoprotein lipase activity
Time Frame: 0 weeks and 2 weeks
0 weeks and 2 weeks

Collaborators and Investigators

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

Sponsor

University of Leicester

Collaborators

National Institute for Health Research, United Kingdom
National Health Service, United Kingdom

Investigators

  • Principal Investigator: Melanie J Davies, MD, University of Leicester

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

Helpful Links

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

October 1, 2013

Primary Completion (Actual)

November 1, 2014

Study Completion (Actual)

November 1, 2014

Study Registration Dates

First Submitted

January 2, 2014

First Submitted That Met QC Criteria

May 6, 2014

First Posted (Estimate)

May 9, 2014

Study Record Updates

Last Update Posted (Estimate)

December 10, 2014

Last Update Submitted That Met QC Criteria

December 9, 2014

Last Verified

December 1, 2014

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 0376

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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