title: Variability of the center of pressure pattern integral during walking.
abstract: The objective of this study was to measure the between-trial variability of the center of pressure pattern integral (COPPI) at the shoe-floor interface and within the shoe. Ten trials of the COPPI were recorded simultaneously at the shoe-floor interface and within the shoe as ten subjects walked over ground in standardized footwear and with two types of foot orthoses. While the results showed that the within-shoe shoe-only and soft orthoses conditions caused the greatest decrease in the COPPI, it was extremely inconsistent-between trials, whether measured at the shoe-floor interface or within the shoe. This suggests that the COPPI is not an acceptable method of assessing the effectiveness of foot orthoses.
authors.affiliation: Department of Physical Therapy, Northern Arizona University, Flagstaff 86011, USA.
authors.forename: T G
authors.initials: TG
authors.lastname: McPoil
authors.forename: M W
authors.initials: MW
authors.lastname: Cornwall
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005069:Evaluation Studies as Topic; D005528:Foot / Q000502:physiology*; D005530:Foot Deformities / Q000503:physiopathology / Q000628:therapy; D006801:Humans; D009989:Orthotic Devices / Q000592:standards*; D011312:Pressure; D015203:Reproducibility of Results; D012775:Shoes / Q000592:standards; D016138:Walking / Q000502:physiology*