title: Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral and medial side-hopping.
abstract: [Purpose] Kinematic and kinetic characteristics of the limb during side-hopping and hip/knee interaction during this motion have not been clarified. The purposes of this study were to examine the biomechanical parameters of the knee during side hop and analyze its relationship with clinical measurements of hip function. [Subjects and Methods] Eleven male college rugby players were included. A three-dimensional motion analysis system was used to assess motion characteristics of the knee during side hop. In addition, hip range of motion and muscle strength were evaluated. Subsequently, the relationship between knee motion and the clinical parameters of the hip was analyzed. [Results] In the lateral touchdown phase, the knee was positioned in an abducted and externally rotated position, and increasing abduction moment was applied to the knee. An analysis of the interaction between knee motion and hip function showed that range of motion for hip internal rotation was significantly correlated with external rotation angle and external rotation/abduction moments of the knee during the lateral touchdown phase. [Conclusion] Range of motion for hip internal rotation should be taken into consideration for identifying the biomechanical characteristics in the side hop test results.
authors: Department of Physical Therapy, Faculty of Nursing and Rehabilitation, Konan Women's University, Japan.
authors: Hiromitsu
authors: H
authors: Itoh
authors: Department of Rehabilitation, Kobe University Hospital, Japan.
authors: Kohei
authors: K
authors: Takiguchi
authors: Department of Rehabilitation, Kobe University Hospital, Japan.
authors: Yohei
authors: Y
authors: Shibata
authors: Department of Physical Therapy, Faculty of Rehabilitation, Kobe Gakuin University, Japan.
authors: Satoshi
authors: S
authors: Okubo
authors: Department of Orthopedic Surgery, Hyogo College of Medicine, Japan.
authors: Shinichi
authors: S
authors: Yoshiya
authors: Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Japan.
authors: Ryosuke
authors: R
authors: Kuroda
keywords: Hip function; Knee joint motion analysis; Side hop