Recently, researchers performed magnetic resonance imaging (MRI) scans of the knee joints of 265 people with osteoarthritis of the knee to determine cartilage loss over a 30-month period. They also measured the strength of the patients' quadriceps (upper thigh) muscles.

Result: Patients who had stronger quadriceps had less cartilage loss behind the kneecap.

Theory: Strong quadriceps may help prevent excessive wear and tear on knee cartilage.

If you have knee osteoarthritis: Ask your doctor about quadricep exercises.

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