title: Center of pressure trajectory differences between shod and barefoot running.
abstract: This study examined differences in center of pressure (COP) trajectories between shod and barefoot running. Ten habitually shod runners ran continuous laps under both shod and barefoot conditions. The COP trajectory was calculated in the global coordinate system but then transformed to the anatomic coordinate system of the foot. The anterior-posterior and medio-lateral positions and excursions of the COP, as well as the most medial location and percent stand at which it occurred were examined. Additionally, external eversion moments and ground reaction forces were assessed. Compared to the shod condition, in the barefoot condition the COP was located more anteriorly early in stance and the COP was located significantly more medially at most time points across stance. There were no differences in external eversion moments during early stance or peak ground reaction forces between conditions. Future studies on mechanical or epidemiological differences between shod and barefoot running may find the COP trajectory an informative parameter to examine.
authors.affiliation: Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR 97403-1240, USA.
authors.forename: James
authors.initials: J
authors.lastname: Becker
authors.affiliation: Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR 97403-1240, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Pisciotta
authors.affiliation: Slocum Center for Orthopedics and Sports Medicine, Eugene, OR, USA.
authors.forename: Stan
authors.initials: S
authors.lastname: James
authors.affiliation: Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR 97403-1240, USA.
authors.forename: Louis R
authors.initials: LR
authors.lastname: Osternig
authors.affiliation: Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR 97403-1240, USA. Electronic address: chou@uoregon.edu.
authors.forename: Li-Shan
authors.initials: LS
authors.lastname: Chou
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005528:Foot / Q000502:physiology*; D006801:Humans; D008297:Male; D011312:Pressure; D012420:Running / Q000502:physiology*; D012775:Shoes
keywords: Barefoot running; Center of pressure; Eversion; Running