Activation of the quadriceps muscle during semisquatting with different hip and knee positions in patients with anterior knee pain.

@article{Lam2001ActivationOT,
  title={Activation of the quadriceps muscle during semisquatting with different hip and knee positions in patients with anterior knee pain.},
  author={Polly Woon-Yee Lam and Gabriel Y. F. Ng},
  journal={American journal of physical medicine & rehabilitation},
  year={2001},
  volume={80 11},
  pages={804-8}
}
OBJECTIVE We measured the surface electromyographic activities of vastus medialis obliquus and vastus lateralis in 16 subjects with patellofemoral joint pain syndrome. DESIGN Each subject performed bilateral static knee extension exercises at 60% of his or her maximal voluntary effort under different combinations of hip rotation (30 degrees of medial rotation, neutral, 45 degrees of lateral rotation) and knee flexion (20 and 40 degrees) in a standing position. The ratio of surface-integrated… CONTINUE READING
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