Sports Injuries


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Sports Injuries-Runner's Knee

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Runners knee, also known as chondromalacia patellae, is a common overuse injury in which pain occurs under the kneecap. Misalignment issues can cause the cartilage under the kneecap to wear prematurely.

  • Patients with runners knee often feel pain when going up or down stairs, sitting for long periods of time with the knees flexed sitting in a car or theater.
  • The kneecap sits in a groove on the thigh bone or femur.  As the leg extends and flexes, the patella rides up and down in that groove. Anything that causes the kneecap to move side to side instead of purely up and down results in wearing of it's cartilage. A muscle imbalance in which the muscles on the outside of the thigh (lateral quadriceps or vastus lateralis) are stronger than those on the inside of the thigh (medial quadriceps or vastus medialis) can result in such movement.  Excessive pronation or rolling in of the foot causes the knee to move inward (into valgus) and may cause the kneecap to move outward in response causing runners knee. 

I developed chondromalacia patellae while running through the streets of Philadelphia as a medical student. My foot is flat and pronates. Curative treatment included use of foot orthotics and medial quadricep strengthening exercises.  

For more information on Runner's Knee in the San Antonio, TX area, call Ed Davis, DPM, FACFAS at (210) 490-3668 today!

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South Texas Podiatrist
109 Gallery Circle, Suite 119
Stone Oak

San Antonio, TX 78258
Phone: 210-490-3668
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