Relationship between Knee Valgus and Posture during a Single-leg Squat in Healthy Female

• Published in: Physical Therapy Japan Vol. 46; no. 3; pp. 162 - 167
• Main Authors: HIDA, Naoto, ISHII, Shinichiro, SAKURAI, Yoshimi, YAMAMOTO, Sumiko
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society of Physical Therapy 2019; 日本理学療法士学会
• Subjects: Knee valgus; Posture; Single-leg squat; Three-dimensional motion analysis; 三次元動作解析; 姿勢; 片脚スクワット; 膝関節外反
• ISSN: 0289-3770; 2189-602X
• DOI: 10.15063/rigaku.11514

Purpose: The purpose of this study was to analyze the relationship between knee valgus and posture during single-leg squat kinematically and kinetically.Methods: The subjects were 20 healthy young women (40 limbs). By using a three-dimensional movement analysis device, we calculated the pelvic and leg joint angles, and leg joint moment during single-leg squat. In addition, we calculated the leg joint angle in the standing posture. We performed a correlation analysis between the knee valgus angle during single-leg squat and other parameters calculated in the standing posture and single-leg squat.Results: The results showed that the larger the knee valgus angle, the larger the foot inversion angle in the static position. In addition, the larger the knee valgus angle, the larger the pelvic backward tilt angle and knee extension moment, and the smaller the hip extension moment.Conclusion: The results suggested that in order to reduce knee valgus angle, it was important to reduce foot inversion angle in standing position, and approach to pelvic and hip in sagittal plane.