Evaluating Two Exercise Training Programs to Reduce Leg Pain in People With Peripheral Arterial Disease (The EXERT Study)

This study is currently recruiting participants. (see Contacts and Locations)
Verified February 2013 by University of Minnesota - Clinical and Translational Science Institute
Sponsor:
Collaborator:
Information provided by (Responsible Party):
University of Minnesota - Clinical and Translational Science Institute
ClinicalTrials.gov Identifier:
NCT00895635
First received: May 6, 2009
Last updated: February 20, 2013
Last verified: February 2013
  Purpose

Peripheral arterial disease (PAD) is a disorder that affects more than 8 million people in the United States. As a result of decreased blood flow to the legs, people with PAD may experience leg pain and difficulty with walking. This study will examine the effectiveness of two exercise programs—a treadmill walking program and an aerobic arm exercise program—at increasing walking distance and decreasing leg pain in people with PAD.


Condition Intervention Phase
Intermittent Claudication
Peripheral Vascular Diseases
Behavioral: Treadmill Exercise Training
Behavioral: Arm Ergometry Exercise Training
Behavioral: Usual Care
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Exercise Training to Reduce Claudication: Arm Ergometry Versus Treadmill Walking

Resource links provided by NLM:


Further study details as provided by University of Minnesota - Clinical and Translational Science Institute:

Primary Outcome Measures:
  • Maximal walking distance [ Time Frame: Measured at baseline and Weeks 6, 12, and 24 ] [ Designated as safety issue: No ]
  • Pain-free walking distance [ Time Frame: Measured at baseline and Weeks 6, 12, and 24 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Limb blood flow [ Time Frame: Measured at baseline and Weeks 6, 12, and 24 ] [ Designated as safety issue: No ]
  • Cardiovascular function [ Time Frame: Measured at baseline and Weeks 6, 12, and 24 ] [ Designated as safety issue: No ]
  • Quality of life [ Time Frame: Measured at baseline and Weeks 6, 12, and 24 ] [ Designated as safety issue: No ]

Estimated Enrollment: 150
Study Start Date: January 2009
Estimated Study Completion Date: April 2013
Estimated Primary Completion Date: April 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Treadmill Exercise Training
Participants will take part in a 12-week supervised treadmill exercise training program.
Behavioral: Treadmill Exercise Training
60-minute sessions of supervised treadmill exercise training three times a week for 12 weeks
Experimental: Arm Ergometry Exercise Training
Participants will take part in a 12-week supervised aerobic arm ergometry exercise training program.
Behavioral: Arm Ergometry Exercise Training
60-minute sessions of supervised aerobic arm exercise training using an arm ergometer three times a week for 12 weeks
Active Comparator: Usual Care Control Group
Participants will receive usual care for PAD from their doctor.
Behavioral: Usual Care
Usual care for PAD

Detailed Description:

PAD is a condition that occurs when atherosclerotic plaque builds up in the peripheral arteries and restricts blood flow. People with PAD often experience reduced blood flow to the legs, which may cause painful leg cramping while walking, known as intermittent claudication. Claudication affects over 4 million people in the United States, and many people with this condition can walk only ½ to 2 blocks before leg pain begins to occur. Regular treadmill walking has been shown to be effective at increasing walking distance and reducing claudication in people with PAD. However, walking on a treadmill may prove difficult for some people with PAD and usually causes increased leg pain, both of which may reduce exercise frequency. Aerobic arm exercises do not cause leg pain and may be an effective way for people with PAD to improve overall cardiovascular fitness and increase the amount of exercise they do. The purpose of this study is to compare the effectiveness of a treadmill exercise program and an aerobic arm exercise program at reducing symptoms of claudication and improving walking ability in people with PAD.

This study will enroll people with PAD and claudication. At a baseline study visit, participants will complete a treadmill walking test; a blood collection; and questionnaires to assess walking status, daily activity levels, quality of life, and mood. One week after the baseline visit, participants will attend a study visit for an assessment of forearm and leg muscle blood flow and a hand-bike test that will measure upper body strength using an arm cycle ergometer. The ergometer is a device with bicycle pedals that people move using their arms. Participants will then be randomly assigned to either a treadmill exercise training program, an arm ergometry exercise program, or a control group.

Participants in the treadmill exercise training program will attend a supervised program at one of four study sites and exercise on a treadmill for 1 hour three times a week for 12 weeks. Participants in the arm ergometry exercise program will attend a supervised program at one of four study sites and exercise using an arm cycle ergometer (hand-bike) for 1 hour three times a week for 12 weeks. Participants in both groups will also receive written instructions about exercising on their own. Participants in the control group will continue to receive usual care from their regular doctor for the treatment of PAD and will be provided with written exercise instructions. Once a week for 12 weeks, participants in the control group will attend study visits to discuss any health problems.

All participants will be asked to monitor their daily exercise for 3 separate weeks during the 12-week period by wearing an accelerometer, which will measure and record physical activity. They will also record their exercise habits in a written diary. All participants will attend study visits on 2 separate days at Weeks 6 and 12 for repeat baseline testing.

From Weeks 12 to 24, all participants will be encouraged to continue to exercise on their own at least three times a week for 30 minutes. Every 4 weeks, study researchers will call participants to offer encouragement and answer questions. At Week 23, participants will again wear an accelerometer and keep an exercise diary for 1 week. All participants will attend a final study visit at Week 24 for repeat baseline testing.

  Eligibility

Ages Eligible for Study:   18 Years to 90 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Has lifestyle-limiting claudication
  • Able to walk on a treadmill at 2 mph
  • Able to perform arm ergometry exercise
  • Able to complete a 12-week exercise program

Exclusion Criteria:

  • Physical activities are limited for reasons other than claudication
  • Uncontrolled high blood pressure
  • Uncontrolled diabetes
  • Unstable coronary heart disease
  • Ischemic rest pain or tissue loss
  • Recent (in the 3 months before study entry) coronary or peripheral revascularization
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00895635

Contacts
Contact: Diane J. Treat-Jacobson, PhD, RN 612-624-7613 treat001@umn.edu
Contact: Laura N. Kirk, PhD, RN 612-626-4687 kirk0013@umn.edu

Locations
United States, Minnesota
University of Minnesota Recruiting
Minneapolis, Minnesota, United States, 55455
Contact: Laura N. Kirk, PhD, RN    612-626-4687    kirk0013@umn.edu   
Contact: Ulf G. Bronas, PhD    612-725-9308    brona001@umn.edu   
Principal Investigator: Diane J. Treat-Jacobson, PhD, RN         
Sponsors and Collaborators
University of Minnesota - Clinical and Translational Science Institute
Investigators
Principal Investigator: Diane J. Treat-Jacobson, PhD, RN University of Minnesota - Clinical and Translational Science Institute
  More Information

No publications provided

Responsible Party: University of Minnesota - Clinical and Translational Science Institute
ClinicalTrials.gov Identifier: NCT00895635     History of Changes
Other Study ID Numbers: 631, R01HL090854-01A1
Study First Received: May 6, 2009
Last Updated: February 20, 2013
Health Authority: United States: Federal Government

Keywords provided by University of Minnesota - Clinical and Translational Science Institute:
Claudication
Peripheral Arterial Disease
Exercise Rehabilitation
Cardiovascular Function

Additional relevant MeSH terms:
Intermittent Claudication
Vascular Diseases
Peripheral Vascular Diseases
Peripheral Arterial Disease
Arteriosclerosis
Arterial Occlusive Diseases
Cardiovascular Diseases
Signs and Symptoms
Atherosclerosis

ClinicalTrials.gov processed this record on July 09, 2014