Kinematic Analysis of a Single Leg Drop Landing for Various Static Alignments of the Knee

• Published in: Rigaku ryoho kagaku 2012, Vol.27(6), pp.657-660
• Main Authors: ARAI, Takahiro, MIAKI, Hiroichi
• Format: Article
• Language: English
• Subjects: knee static alignment; knee-in and toe-out; single leg drop landing
• ISSN: 1341-1667; 2434-2807
• DOI: 10.1589/rika.27.657

[Purpose] The purpose of this study was to examine the influence of static knee alignment on knee-in and tibial rotation, and the relationship between knee-in and tibial rotation angle during a single leg drop landing. [Subjects] One hundred three women were classified into 3 groups: valgus (7), neutral (10) and varus (10) based on static alignment of their knees. [Method] Three-dimensional motion analysis was carried out during a single leg drop landing from a platform 30 cm in height. [Results] The variation of knee-in angle in the the varus group was significantly greater than that in the valgus group. The tibia was internally rotated in the valgus group and externally rotated in the varus group. There was a correlation between the variation of knee-in angle and the variation of the tibial rotation angle. [Conclusion] The direction of tibial rotation was influenced by static knee alignment, and the variation of knee-in angle was influenced by the direction of the tibial rotation.