Exercise Training in Type 2 Diabetes and Hypertension (SHAPE2)

January 18, 2013 updated by: Kerry Stewart, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
The coexistence of diabetes and hypertension is damaging to cardiac and peripheral vascular structure and function. Although several health organizations endorse exercise training as a treatment for type 2 diabetes, most studies of exercise and diabetes have focused on controlling blood sugar but not on cardiovascular health. The aim of this study is to determine if exercise training reduces blood pressure and improves cardiovascular health in persons who have both type 2 diabetes and hypertension. An equal number of men and women will be enrolled, and another aim of the study is to examine gender differences in response to exercise training.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Type 2 diabetes is associated with damage, dysfunction, and failure of various organs. The coexistence of diabetes and hypertension is particularly damaging to cardiac and peripheral vascular structure and function. These diseases, either alone or combined, result in increased left ventricular mass and wall thickness, left ventricular diastolic dysfunction, impaired endothelial vasodilator function, and increased vascular stiffness. Although several health organizations endorse exercise training as a therapeutic modality for type 2 diabetes, most studies of exercise and diabetes have focused on glycemic control but not on cardiovascular health. Although exercise lowers blood pressure in persons without diabetes, there are profound gaps in knowledge about the effects of exercise training on blood pressure and cardiovascular health in persons with type 2 diabetes. The primary specific aim of this study is to determine if exercise training reduces blood pressure in persons who have both type 2 diabetes and high normal blood pressure or mild hypertension prehypertension or Stage 1 (mild) hypertension. Subjects will be randomized to 6-months of exercise training, consistent with established guidelines for diabetes and for hypertension, or to a usual care control group. The second specific aim is to identify the effects of exercise training on parameters of cardiac and peripheral vascular structure and function related to cardiovascular disease in diabetes and hypertension. We will assess left ventricular mass, left ventricular diastolic function, endothelial vasodilator function, and vascular stiffness using high-resolution ultrasound, Doppler echocardiography, and magnetic resonance imaging. We will also examine interleukin-6 and high-resolution C-reactive protein as novel risk factors for cardiovascular disease and diabetes to determine the effects of exercise training on the inflammatory process. Because exercise training improves fitness and may improve body composition and regional fat distribution, the associations of change in these parameters with change in blood pressure and cardiac and peripheral vascular structure and function will be analyzed. An equal number of men and women will be enrolled, and a third specific aim of the study is to examine gender differences in response to exercise training. This study will expand the scientific knowledge that defines exercise guidelines and will provide new insight into the mechanisms by which exercise reduces blood pressure and improves cardiovascular health in persons with type 2 diabetes and hypertension.

Study Type

Interventional

Enrollment (Actual)

115

Phase

  • Phase 4

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 States
    • Maryland
      • Baltimore, Maryland, United States, 21224
        • Johns Hopkins Bayview Medical Center

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

40 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

ages 40-65 years type 2 diabetes BP between SBP 120-159 or DBP 80-99 mm Hg sedentary

Exclusion Criteria:

cardiovascular disease abnormal exercise stress test smoking insulin use major illnesses that would preclude exercise training pregnancy in women engaged in regular exercise or weight loss diet program substance abuse morbid obesity BMI > 42

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: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Exercise training
Exercise training, 3 times per week, for 6 months.
Behavioral: Exercise training for 6 months
Exercise 3 times/week for 6 months. Exercise consists of aerobic and resistance exercise
No Intervention: Control
Usual care no active exercise intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Blood pressure at 6 months
Time Frame: 6 months
6 months

Secondary Outcome Measures

Outcome Measure
Time Frame
Cardiac and peripheral structure and function at 6 months
Time Frame: 6 months
6 months
Fitness and body composition at 6 months
Time Frame: 6 months
6 months
Cardiac and diabetes risk factors at 6 months
Time Frame: 6 months
6 months
Systemic inflammation at 6 months
Time Frame: 6 months
6 months

Collaborators and Investigators

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

Sponsor

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

  • Principal Investigator: Kerry J Stewart, EdD, Johns Hopkins School of Medicine

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

May 1, 2004

Primary Completion (Actual)

December 1, 2010

Study Completion (Actual)

December 1, 2010

Study Registration Dates

First Submitted

September 13, 2005

First Submitted That Met QC Criteria

September 13, 2005

First Posted (Estimate)

September 21, 2005

Study Record Updates

Last Update Posted (Estimate)

January 23, 2013

Last Update Submitted That Met QC Criteria

January 18, 2013

Last Verified

January 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DK62368 (completed)
  • DK62368

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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