Gender Differences in the Activity and Ratio of Vastus Medialis Oblique and Vastus Lateralis Muscles during Drop Landing

  • Kim M
  • Yoo W
  • Yi C
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Abstract

{[}Purpose] The purpose of this Study was to determine whether gender
differences exist in the activity and ratio of the vastus medialis
oblique and vastus lateralis muscles when performing a vertical drop
landing. {[}Subjects] Thirty participants (15 males, 15 females) dropped
from the height of their lower leg. {[}Methods] The EMG activities of
the vastus medialis oblique and vastus lateralis muscles were recorded
during vertical drop landing using surface electrodes. {[}Results] The
muscle activities and the ratio of both muscles were significantly
higher for males than for females. The muscle activity of the vastus
medialis oblique muscle was 36.3% for males and 20.2% for females, and
that of the lateralis muscle was 34.2% for males and 26.1% for
females. The mean ratio of the vastus medialis oblique muscle : vastus
lateralis muscle was 1.07 for males and 0.78 for females. {[}Conclusion]
For females, drop landing in females may increase the likelihood of
patellofemoral pain syndrome.

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Authors

  • Min-Hee Kim

  • Won-Gyu Yoo

  • Chung-Hwi Yi

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