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

Two new studies found that exercise may be a factor in recovering from a total knee replacement (total knee arthroplasty or TKA) and knee osteoarthritis (OA). One study involving a progressive quadriceps strengthening program after total knee replacement found that it enhanced clinical improvement almost to the level of healthy older adults. The other study, the first to examine the relationship between four components of physical activity and the incidence of knee OA in older adults, found that certain types of activities were linked to an increased risk of the disease. The studies were published in the February issue of Arthritis Care & Research (http://www3.interscience.wiley.com/journal/77005015/home).

Nearly half a million total knee replacements are performed each year in the U.S. to treat severe knee OA, which is on the rise due to an increase in the elderly and overweight populations. Although knee replacement improves function, patients continue to have impaired quadriceps strength and function for activities such as walking and climbing stairs, which remain below those of healthy people of the same age. Rehabilitation targeting these areas has not been studied well and is not routinely prescribed.

A randomized controlled trial led by Lynn Snyder-Mackler of the University of Delaware and funded by the National Institutes of Health involved 200 patients who had undergone a knee replacement and 41 patients who received conventional standard of care (inpatient rehabilitation and home physical therapy). The 200 patients received six weeks of progressive strength training two or three times a week that targeted knee extension, range of motion, kneecap mobility, quadriceps strength, pain control and gait. Half of this group also received neuromuscular electrical stimulation (NMES).

The results showed that those who did the strength training program had 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.

The study did not find an association between the level of overweight and mechanical strain in the incidence of knee OA. "This finding could indicate that the higher risk of knee OA in obese persons may be explained by factors other than increased mechanical strain, and higher levels of physical activity may not negatively affect knee health in heavier respondents," the authors state.

The authors caution that before these results can be translated into advice for health professionals on daily activities for older adults, further studies need to be conducted to clarify the optimal amount of daily activity necessary for healthy joints for each component of physical activity.


'/>"/>

Contact: Sean Wagner
medicalnews@bos.blackwellpublishing.com
781-388-8550
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. Report shows motor control exercises reduce persistent low-back pain
2. American Council on Exercise (ACE) Endorses Appointment of Dr. Sanjay Gupta as Surgeon General of the United States
3. Medical Experts Use Data to Dispel Myths About Fad Diets and Exercise
4. Simple Exercise Keeps Brain at Top of Its Game
5. Abnormal Heart Function Reduces Exercise Capacity
6. Exercise Tips for Seniors to Start a Healthy 2009
7. Brain Fitness Coming to Senior Exercise Classes
8. Diet, Exercise Cuts Kids Risk for Metabolic Syndrome
9. Parents Not Best Barometer of Kids Eating, Exercise Habits
10. Consumer Reports: Big Promises of Some Infomercial Exercise Machines Fall Flat; Plus, Set Up a Home Gym for Under $100
11. Study Shows Exercise Shields Against Osteoporosis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... TopConsumerReviews.com recently awarded their ... Eyeglasses . , Millions of individuals in the United States and Canada wear eyeglasses. ... way to both correct vision and make a fashion statement. Even celebrities use glasses ...
(Date:6/26/2016)... ... 2016 , ... PawPaws brand pet supplements owned by Whole Health ... the health of felines. The formula is all-natural and is made from Chinese herbs ... Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract and Rehmannia ...
(Date:6/25/2016)... ... 2016 , ... Austin residents seeking Mohs surgery services, can now turn to ... Dr. Russell Peckham for medical and surgical dermatology. , Dr. Dorsey brings specialization to ... fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey was under the direction of ...
(Date:6/25/2016)... Beach, CA (PRWEB) , ... June 25, 2016 , ... ... UCLA with Magna Cum Laude and his M.D from the David Geffen School of ... Diego and returned to Los Angeles to complete his fellowship in hematology/oncology at the ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article ... are unfamiliar with. The article goes on to state that individuals are now more ... these less common operations such as calf and cheek reduction. The Los Angeles area ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... 2016 Story Highlights: ... within the health care industry is causing providers to ... , Deloitte offers a suite of solutions for health ... efficient cost optimization: labor resource analysis, revenue cycle optimization ... better outcomes and better economics ...
(Date:6/24/2016)... , June 24, 2016   Bay ... Rehabilitation Network,s Dean Center for Tick Borne ... Medicine and Rehabilitation, MIT Hacking Medicine, University of ... Innovation, today announced the five finalists of ... Lyme disease.  More than 100 scientists, clinicians, researchers, ...
(Date:6/24/2016)... 2016 Dehaier Medical Systems Ltd. (NASDAQ: ... markets and sells medical devices and wearable sleep respiratory ... strategic cooperation agreement with Hongyuan Supply Chain Management Co., ... June 20, 2016, to develop Dehaier,s new Internet medical ... Dehaier will leverage Hongyuan Supply Chain,s sales platform to ...
Breaking Medicine Technology: