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Aerobic Exercise Intervention for Knee Osteoarthritis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00049816
Recruitment Status : Completed
First Posted : November 15, 2002
Last Update Posted : May 17, 2013
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Information provided by:
Mayo Clinic

Brief Summary:
This trial will test if walking or bicycling exercise is effective as a non-surgical treatment option for patients with knee osteoarthritis.

Condition or disease Intervention/treatment Phase
Osteoarthritis Behavioral: Walking exercise Behavioral: Cycling Exercise Not Applicable

Detailed Description:

Traditional, conservative medical treatment of osteoarthritis has been directed at improving functional status through reducing joint pain and inflammation and maintaining or restoring joint function. Exercise is an adjunct therapy in the clinical management of patients with osteoarthritis of the knee. However, it is not uniformly accepted. The central hypothesis of this work is that the Surgeon General's exercise guidelines can be successfully implemented as an effective nonsurgical option for treatment of patients with early stages of knee osteoarthritis.

Patients with knee osteoarthritis will be randomized into a control group, a walking exercise group, and a stationary cycling exercise group. The individuals in the exercise groups will be required to exercise three times per week for one year using emerging public health recommendations for aerobic exercise in the adult and aging population. Patient outcome will be assessed using objective gait analysis measurements, knee radiographs to quantify joint space narrowing, magnetic resonance imaging, a general health questionnaire (SF-36), a disease/site specific questionnaire (WOMAC), and a visual-analog pain scale. All subjects will be studied at 0 and 52 weeks.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 306 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Aerobic Exercise Intervention for Knee Osteoarthritis
Study Start Date : October 2002
Actual Primary Completion Date : April 2007
Actual Study Completion Date : April 2007

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
No Intervention: 1
Participants will receive no intervention and will act as the control group.
Experimental: 2
Participants will partake in a walking exercise program.
Behavioral: Walking exercise
30 minutes/day, 3 times/week for 52 weeks

Experimental: 3
Participants will partake in a cycling exercise program.
Behavioral: Cycling Exercise
30 minutes/day, 3 times/week for 52 weeks

Primary Outcome Measures :
  1. VAS, SF-36, WOMAC, and Activity Index questionnaires [ Time Frame: Week 52 ]
  2. Weight-bearing anterior-posterior (AP) and lateral x-rays of the knee [ Time Frame: Week 52 ]
  3. MRI imaging of the knee [ Time Frame: Week 52 ]
  4. Measurements of gait during level walking and stair climbing [ Time Frame: Week 52 ]

Secondary Outcome Measures :
  1. Change in consumption of analgesics, reflecting the level of joint pain [ Time Frame: Week 52 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria

  • Current symptoms of chronic (6 months), stable pain and/or stiffness in one or both knees during weight-bearing activities
  • Involved joint is primary factor limiting physical or functional activity
  • Radiographic signs of mild or moderate arthritis
  • Mild joint space narrowing (at least 2mm remaining)

Exclusion Criteria

  • Current participation in a regular exercise program
  • Existing medical condition that would preclude increased physical activity
  • Subjective complaint of instability (giving way)
  • Ligamentous instability greater than Grade I
  • Knee flexion contracture greater than 15 degrees
  • Asymptomatic osteoarthritis of both knees, incapacitating arthritis, or inflammatory arthritis
  • Major reconstructive surgery on a lower extremity joint
  • Multiple major joint involvement
  • Any condition which severely limits local ambulation, such as amputation or stroke
  • Gait aids used majority of time for ambulation
  • Cannot use step-over-step techniques in either ascending or descending stair conditions
  • Not able to undergo MRI scan (e.g., cardiac pacemaker)
  • Dementia or inability to give informed consent as determined by a Folstein Mini Mental score greater than 24

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00049816

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United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
Sponsors and Collaborators
Mayo Clinic
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
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Principal Investigator: Kenton R Kaufman, PhD Mayo Clinic
Publications of Results:
Other Publications:
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Responsible Party: Kenton R. Kaufman, Mayo Clinic Identifier: NCT00049816    
Other Study ID Numbers: R01AR048768 ( U.S. NIH Grant/Contract )
R01AR048768 ( U.S. NIH Grant/Contract )
First Posted: November 15, 2002    Key Record Dates
Last Update Posted: May 17, 2013
Last Verified: May 2013
Keywords provided by Mayo Clinic:
aerobic exercise
Additional relevant MeSH terms:
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Osteoarthritis, Knee
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases