Activation of the vastus medialis oblique and vastus lateralis muscles in
asymptomatic subjects during the sit-to-stand procedure |
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Authors: | Boram Choi |
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Institution: | 1) Department of Physical Therapy, College of Medical and Life Sciences, Silla University, Republic of Korea |
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Abstract: | Purpose] The purpose of this study was to examine the vastus medialis oblique to vastus
lateralis ratio in two pelvic tilt positions while performing the sit-to-stand task.
Subjects and Methods] Activation of the vastus medialis oblique and the vastus lateralis
muscles of 46 healthy subjects (25 males, 21 females) were recorded by surface
electromyography during the STS task with anterior pelvic tilt (sit with thoracolumbar
spine extended and pelvis in an anterior tilt) and neutral pelvic tilt (sit with
thoracolumbar spine relaxed and pelvis in the neutral tilt position) positions. Changes in
vastus medialis oblique, vastus lateralis activation and the vastus medialis
oblique/vastus lateralis ratio were analyzed. Results] Vastus medialis oblique and vastus
lateralis muscle activation significantly increased in neutral pelvic tilt position, but
the vastus medialis oblique/vastus lateralis ratio was not statistically different.
Conclusion] The sit-to-stand procedure with neutral pelvic tilt position increased
activation of the vastus medialis oblique and vastus lateralis, usefully strengthening the
quadriceps, but did not selectively activate the vastus medialis oblique muscle.Key words: Anterior pelvic tilt, Neutral pelvic tilt, Sit-to-stand task |
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