Effect of knee extensor power on knee pain in adults with or at risk for osteoarthritis: the multicenter osteoarthritis study

Key Points

1. Compared to the strongest knee extensor power quartile, the weakest knee extensor power quartile had 1.35 times the odds of worsening knee pain severity and nearly twice the odds of frequent knee pain in adults with or at risk for knee OA.

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BACKGROUND & OBJECTIVE

Muscle power (the ability to generate force rapidly) is essential for functional movements such as rising from a chair or climbing stairs and tends to decline before a significant loss of muscle strength is observed in older adults (1). As a result, knee extensor power may have a more significant impact than knee extensor strength on knee pain and osteoarthritis (OA) progression in older adults with knee OA.

Therefore, the objective of this study was to evaluate the relationship between knee extensor power and changes in knee pain over two years in adults with, or at risk for, knee OA.

Muscle power is critical for daily function and declines earlier than strength in older adults.

These study findings suggest training knee extensor power can positively influence the worsening and/or development of frequent knee pain in adults with/or at risk of knee Osteoarthritis.

METHODS

• This study used data from the Multicenter Osteoarthritis (MOST) Study.

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