Aquatic Power Training

Optimizing Mobility in Older Adults With Knee Osteoarthritis: Aquatic Power Training

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.

Study Overview

• Status: Completed
• Conditions: Knee Osteoarthritis
• Intervention / Treatment: Other: Aquatic Power Training

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
• Enrollment (Actual): 81
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Iowa
    • Iowa City, Iowa, United States, 52242
      • The University of Iowa

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 50 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / 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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
400 meter walk time	0, 6, and 12 weeks

Secondary Outcome Measures

Outcome Measure	Time Frame
Lower limb function (LLFDI)	0, 6, and 12 weeks
Quality of life (KOOS)	0, 6, and 12 weeks
Knee osteoarthritis pain (KOOS pain scores)	0 and 6 weeks
Vastus lateralis muscle bulk	0, 2, 6, and 12 weeks

Collaborators and Investigators

• Sponsor: University of Iowa

Study record dates

Study Major Dates

• Study Start: April 1, 2009
• Primary Completion (Actual): December 1, 2009
• Study Completion (Actual): December 1, 2009

Study Registration Dates

• First Submitted: May 15, 2009
• First Submitted That Met QC Criteria: May 15, 2009
• First Posted (Estimate): May 19, 2009

Study Record Updates

• Last Update Posted (Estimate): June 25, 2010
• Last Update Submitted That Met QC Criteria: June 24, 2010
• Last Verified: June 1, 2010

More Information

Terms related to this study

• Keywords: osteoarthritis; rehabilitation; knee pain; power training
• Additional Relevant MeSH Terms: Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Arthritis; Osteoarthritis; Osteoarthritis, Knee
• Other Study ID Numbers: 200903762