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Exercise plays large role in recovery from knee replacement and the occurrence of osteoarthritis
Date:1/29/2009

significant improvements in quadriceps strength and muscle activation, functional performance and self-reported function and that they also demonstrated substantially greater quadriceps strength and functional performance after 12 months than the standard of care group. There were no significant differences between the group that just did exercise and the group that did exercise plus NMES.

"Our data suggest that individuals who do not undertake an intensive rehabilitation program following TKA are clearly at a disadvantage," the authors state. They point out that quadriceps strength is related to functional performance and was the single greatest predictor of function for activities such as rising from a chair or climbing stairs. Functional performance typically peaks about three years following surgery and slowly declines in the following 10 years. "Failing to obtain adequate functional recovery may accelerate functional decline and predispose these individuals to an early loss of functional independence as they age," the authors conclude.

Another study published in the same issue and led by Led by Marjolein Visser of VU University Medical Center in Amsterdam involved almost 1,700 men and women ages 55 to 85 years old of the LASA study that were assessed over a 12-year period for knee OA. Their physical activity was evaluated with a questionnaire that included information on frequency and duration of physical activity over a two-week period. Intensity, mechanical strain, turning action and muscle strength scores were created for each activity.

During the follow-up period, 28 percent of participants developed knee OA. Activities with low muscle strength (such as light household work) or high mechanical strain (such as dancing or tennis) were associated with an increased risk of knee OA, even after adjusting for demographics, health, and early life/current physical activity, as well as the other components of physical activity.


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Contact: Sean Wagner
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Source:Eurekalert

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