Aquatic Power Training

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: NCT00904319
Recruitment Status : Completed
First Posted : May 19, 2009
Last Update Posted : June 25, 2010
Information provided by:
University of Iowa

Brief Summary:
Knee Osteoarthritis (OA) accounts for a significant proportion of mobility limitations and is one of the most disabling problems facing the growing population of older adults. The purpose of this research is to reduce disablement of older adults with symptomatic knee osteoarthritis.

Condition or disease Intervention/treatment Phase
Knee Osteoarthritis Other: Aquatic Power Training Not Applicable

Detailed Description:

Aquatic based training can offer many of the same benefits associated with a land based exercises but water has certain properties that provide a more gentle and welcoming environment for exercising. Buoyancy in water counteracts gravity to support the weight of the subject and decrease the forces put on the joints. Viscosity of water can provide resistance proportional to the effort exerted and with gentle friction enhancing proprioceptive feedback. Immersing in warm water can cause an increase in body temperature due to specific heat and thermal conductivity, which can cause blood vessels to dilate. In addition, hydrostatic forces reduce edema, increasing venous return and healthy circulation. [Prins, 1999]; [Wilder, 1998]

Studies have shown that water based exercise has been proven to significantly decrease pain in people with knee osteoarthritis compared to those in a land based exercise program. [Silva, 2003] In comparing an aquatic physical therapy session to a no intervention group the aquatic program resulted in less pain, improved physical function, quality of life, and strength. [Hinman, 2007]

The purpose of this research study is to determine whether an aquatic therapy program aimed at increasing muscle power will be effective in improving knee symptoms and mobility in men and women with symptomatic knee osteoarthritis.

The purpose of this study is to assess the efficacy of aquatic power training for improving mobility limitations, disability and quality of life in older adults with symptomatic knee OA.

Hypothesis 1: In older adults with symptomatic knee OA, a 6-week aquatic power training intervention will reduce lower limb mobility limitations (400m walk time).

Hypothesis 2: In comparison to baseline measures, at 6-week follow-up, there will be improvements in a) lower limb function (LLFDI), b) quality of life (KOOS Knee QOL),c) knee OA specific pain (KOOS pain) scores, and d) vastus lateralis muscle bulk (thigh muscle). These changes will be sustained at 12 week follow-up.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 81 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Optimizing Mobility in Older Adults With Knee Osteoarthritis: Aquatic Power Training
Study Start Date : April 2009
Actual Primary Completion Date : December 2009
Actual Study Completion Date : December 2009

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Osteoarthritis
U.S. FDA Resources

Arm Intervention/treatment
Experimental: Aquatic
Aquatic Power Training
Other: Aquatic Power Training
Aquatic power training program with an exercise specialist 2/week for 6 weeks.

Primary Outcome Measures :
  1. 400 meter walk time [ Time Frame: 0, 6, and 12 weeks ]

Secondary Outcome Measures :
  1. Lower limb function (LLFDI) [ Time Frame: 0, 6, and 12 weeks ]
  2. Quality of life (KOOS) [ Time Frame: 0, 6, and 12 weeks ]
  3. Knee osteoarthritis pain (KOOS pain scores) [ Time Frame: 0 and 6 weeks ]
  4. Vastus lateralis muscle bulk [ Time Frame: 0, 2, 6, and 12 weeks ]

Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age 50 or older
  • Symptomatic knee osteoarthritis (knee osteoarthritis diagnosed by the American College of Rheumatology criteria and frequent knee symptoms)

Exclusion Criteria:

  • bilateral knee replacement
  • acute or terminal illness
  • unstable cardiovascular condition or other medical conditions that may impair ability to participate such as pulmonary disease requiring use of supplement oxygen, or lower limb musculoskeletal surgery in the past 6 months
  • unwilling to be in a pool (approximately 4 feet deep)
  • 400m walk time equal to or slower than the median for sex and decade:

M 50's 250.2 60's 289.9 70's+ 290.8

F 50's 315.9 60's 305.2 70's+ 292.5

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): NCT00904319

United States, Iowa
The University of Iowa
Iowa City, Iowa, United States, 52242
Sponsors and Collaborators
University of Iowa
Principal Investigator: Neil A Segal, MD, MS The University of Iowa

Responsible Party: Neil A. Segal, MD, The University of Iowa Identifier: NCT00904319     History of Changes
Other Study ID Numbers: 200903762
First Posted: May 19, 2009    Key Record Dates
Last Update Posted: June 25, 2010
Last Verified: June 2010

Keywords provided by University of Iowa:
knee pain
power training

Additional relevant MeSH terms:
Osteoarthritis, Knee
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases