Relationship between hip and foot kinematics with the center of pressure during crossover cutting

抄録

The purpose of this study was to examine the correlation between the passive and dynamic range of hip internal rotation (HIR), one of the risk factors for Jones fracture, foot progression angle (FPA), and lateral deviation of the center of pressure (COP), which is loading index on the fifth metatarsal bone. This crossover study included 12 men with soccer experience. The passive range of HIR (HIR-p) was measured in the prone position. The motion task was crossover cutting in the 45-degree direction and was measured using the 3D motion analysis system and force plate. HIR angle in motion (HIR-m), FPA at initial contact, and the percentage of lateral deviation of the COP within the foot (%LCOP) were calculated from each trajectory. No significant correlation was found between HIR-p and each parameter. %LCOP deviated laterally as peak HIR-m was greater (r = 0.72, p = 0.008). And the greater the FPA, the lower the peak HIR-m (r = -0.83, p = 0.0007). HIR-p may not a factor that increases the mechanical load on the fifth metatarsal bone. Furthermore, increasing the FPA in crossover cutting may alter hip kinematics and result in reduced mechanical loading on the fifth metatarsal bone.