@article{ART003272307},
author={이재익 and 김동현},
title={Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum},
journal={Journal of the Korean Society of Physical Medicine},
issn={1975-311X},
year={2025},
volume={20},
number={4},
pages={95-101}
TY - JOUR
AU - 이재익
AU - 김동현
TI - Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum
JO - Journal of the Korean Society of Physical Medicine
PY - 2025
VL - 20
IS - 4
PB - The Korean Society of Physical Medicine
SP - 95
EP - 101
SN - 1975-311X
AB - PURPOSE: Genu valgum is a common lower extremity malalignment involving medial knee muscle weakness and lateral muscle overactivity. This study examined the effects of visually occluded wide squats on the lower extremity muscle activity in adults with symptoms of genu valgum. METHODS: Twenty adults with genu valgum were assigned randomly to a visual occlusion group or a non-occlusion group. Surface electromyography (EMG) electrodes were attached to the vastus lateralis, vastus medialis, gluteus maximus, and semimembranosus. The participants performed wide squats on step boxes at 0 cm, 15 cm, and 25 cm after a short practice session. Blindfolds were used during the visual occlusion condition. The muscle activity was measured across three repetitions, averaged, and normalized to the percentage of maximal voluntary isometric contraction (%MVIC). A two-way repeated measures analysis of variance (ANOVA) was conducted. RESULTS: The vastus medialis and gluteus maximus activities increased significantly as the step box height was increased, and both showed a significant interaction effect with visual condition. Greater activation occurred as the height increased under visual occlusion. The vastus lateralis activity also increased as the step box height was increased, with a significant interaction but no main effect of the visual condition. Semimembranosus showed significant increases with height and a significant interaction effect. CONCLUSION: A visual occlusion may enhance proprioceptive input and postural strategies, promoting medial and posterior muscle activation while modulating lateral overactivity. Visually occluded wide squats may be an effective intervention to improve the lower extremity alignment in individuals with genu valgum.
KW - Electromyography;Exercise therapy;Genu valgum
DO -
UR -
ER -
이재익 and 김동현. (2025). Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum. Journal of the Korean Society of Physical Medicine, 20(4), 95-101.
이재익 and 김동현. 2025, "Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum", Journal of the Korean Society of Physical Medicine, vol.20, no.4 pp.95-101.
이재익, 김동현 "Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum" Journal of the Korean Society of Physical Medicine 20.4 pp.95-101 (2025) : 95.
이재익, 김동현. Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum. 2025; 20(4), 95-101.
이재익 and 김동현. "Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum" Journal of the Korean Society of Physical Medicine 20, no.4 (2025) : 95-101.
이재익; 김동현. Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum. Journal of the Korean Society of Physical Medicine, 20(4), 95-101.
이재익; 김동현. Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum. Journal of the Korean Society of Physical Medicine. 2025; 20(4) 95-101.
이재익, 김동현. Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum. 2025; 20(4), 95-101.
이재익 and 김동현. "Effects of Visual Occlusion Wide Squats on Lower Extremity Muscle Activity in a Genu Valgum" Journal of the Korean Society of Physical Medicine 20, no.4 (2025) : 95-101.
