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Protect Knees: Weak Quad Muscles Risk Cartilage Damage

Posted Aug 26 2008 4:03pm 1 Comment

Doctors have known for many years that having weak

quad muscles (in the front of your upper legs) increases risk for

damage to the cartilage in your knees. A study from Purdue

University shows that strengthening these muscles slows down

knee cartilage damage and may even improve knee function

( Arthritis & Rheumatism , October 2006).

The researchers placed 221 adults in their sixties and

seventies either on a program of strengthening their muscles in

their upper legs or just moving their knees in a series of range-of-

motion exercises. The subjects exercised three times per week

(twice at a fitness facility and once at home) for 12 weeks. This

program was followed by a transition to home-based exercise for

12 months. Older people weaken naturally with aging, but the

range of motion exercisers lost more strength than those who

exercised against progressive resistance. The strength training

helped retain joint space, signifying that this group had less loss of


The knee is like two sticks held together by four bands

called ligaments. Strength training stabilizes the muscles that

support the knee and helps to prevent loss of cartilage with aging.

People with knee pain should get a diagnosis from their doctors.

Most will be advised to do exercises that strengthen the knee,

such as pedaling a bicycle or performing knee strengthening

exercises that involve bending and straightening the knees

against resistance. People with knee pain should avoid exercises

that jar the joints, such as jumping or running. More: Why arthroscopic knee surgery is usually useless

Comments (1)
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please help!!my mother has been to doctor after doctor and they dont know why she not walking ........she was in a accident that left her laying over for about a hour and 30 mins.on her knees and back bent.......she can lay on her side and lift her legs but she is not able to lift her legs up to walk at all her kness are weak she had xrays nothing show up wrong with her kness but her ligements in the back of her legs are tight her quads in the front of her tights are very weak when we stimulate her legs you can see the muscles jumping but please why is it she cant life them to walk or stand on her own without her kness buckling please help if you can...
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