Relationship between three-dimensional kinematics of knee and trunk motion during shuttle run cutting |
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Authors: | Yasuharu Nagano Hirofumi Ida Masami Akai Toru Fukubayashi |
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Institution: | 1. Department of Health and Sports , Niigata University of Health and Welfare , Niigata, Japan nagano@nuhw.ac.jp;3. Department of Human Systems Science , Graduate School of Decision Science and Technology, Tokyo Institute of Technology , Tokyo, Japan;4. National Rehabilitation Center for Persons with Disabilities , Saitama, Japan;5. Faculty of Sport Sciences , Waseda University , Saitama, Japan |
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Abstract: | Abstract Female athletes are considered to exhibit knee and trunk motion that is characteristic of anterior cruciate ligament (ACL) injury. The aim of this study was to examine the in vivo motion of the trunk and knee during a cutting manoeuvre and determine the relationship between them. All participants (10 male and 10 female college athletes) performed a shuttle run cutting task with the left limb. Trunk inclination (forward and lateral) and knee joint angles (flexion/extension, abduction/adduction, and internal/external tibial rotation) were calculated. Differences between the sexes and associations between knee motion and trunk inclination were examined. An increase in trunk forward inclination was strongly correlated with an increase in knee flexion angle and moderately correlated with a decrease in the excursion of internal tibial rotation. An increase in right trunk lateral inclination was moderately correlated with an increase in excursion of internal tibial rotation. The results also showed differences between the sexes in trunk forward inclination, lateral inclination, and knee flexion angle, but no such differences in knee abduction or internal tibial rotation. Trunk inclination is related to knee flexion and excursion of internal tibial rotation. Female athletes demonstrate a low trunk forward inclination and knee flexion angle, a posture that resembles that of ACL injury. |
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Keywords: | Anterior cruciate ligament injury motion analysis cutting differences between the sexes trunk inclination |
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