Relationship between Hallux Valgus Severity and 3D Ground Reaction Force in Individuals with Hallux Valgus Deformity during Gait

PURPOSE: This study examined the relationship between the severity of a hallux valgus (HV) deformity and the kinetic three-dimensional ground reaction force (GRF) through a motion analysis system with force platforms in individuals with a HV deformity during normal speed walking. METHODS:The participants were 36 adults with a HV deformity.The participants were asked to walk on a 6 m walkway with 40 infrared reflective markers attached to their pelvic and lower extremities.A camera capture system and two force platforms were used to collect kinetic data during gait.A Vicon Nexus and Visual3D motion analysis software were used to calculate the kinetic GRF data.RESULTS: This research showed that the anterior maximal force that occurred in the terminal stance phase during gait had a negative correlation with the HV angle (r = -.762,p < .01).In addition, the HV angle showed a low negative correlation with the second vertical maximal force (r = .346,p < .05)and a moderate positive correlation with the late medial maximal †Corresponding