The effects of squatting with visual feedback on the muscle activation of the
vastus medialis oblique and the vastus lateralis in young adults with an increased
quadriceps angle |
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Authors: | Pil-Neo Hwangbo |
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Institution: | 1) Department of Physical Therapy, Graduate School of Physical Therapy, Daegu University: Naeri-ri, Jillyang, Gyeongsan-si, Gyeongsangbuk-do, Republic of Korea |
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Abstract: | Purpose] The purpose of this study was to identify the effects of performing squat
exercises with visual feedback on the activation of the vastus medialis oblique (VMO) and
vastus lateralis (VL) muscles in young adults with an increased quadriceps angle
(Q-angle). Subjects] This study used a motion analysis program (Dartfish, Switzerland) to
select 20 young adults with an increased Q-angle, who were then divided into a squat group
that received visual feedback (VSG, n=10) and a squat group that received no visual
feedback (SG, n=10). Methods] The intensity of exercises was increased every two weeks
over a six-week exercise period in both groups. A visual marker was attached to the
patella of the subjects in the VSG, and they then performed squat exercises with a maximum
of 90° of knee flexion within a route marked on a mirror. The SG performed squat exercises
with a maximum 90° of knee flexion without attaching a visual feedback device. Results]
Analysis of the muscle activation due to 90° squat exercises indicated that both groups
had statistically significant increases in activation of the VL. The VSG exhibited
statistically significant increases in activation of the VMO. Conclusion] This study
confirmed that squat exercises with visual feedback are effective in activation of the VMO
and VL muscles. The findings are meaningful in terms of preventing the occurrence of
patellofemoral pain.Key words: Q-angle, Visual feedback squat exercise, VMO |
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