Knee osteoarthritis: When you can't walk fast enough to cross busy streets

When a traffic light at a busy intersection flashes the "walk" sign, people with knee osteoarthritis worry if they can walk fast enough to make it across the street in time. New research shows people with this common arthritis are more likely to walk fast enough, if they lead physically active lives. Knee osteoarthritis is a leading cause of disability in adults. As it progresses, it can threaten an individual's ability to live independently.

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