title: Effects of varying amounts of pronation on the mediolateral ground reaction forces during barefoot versus shod running.
abstract: Despite extensive research on running mechanics, there is still a knowledge gap with respect to the degree of relationship between mediolateral ground reaction forces (ML-GRF) and foot pronation. Our goal was to investigate whether differences exist in ML-GRF among runners that exhibit different degrees of pronation. Seventeen male and 13 female recreational runners ran with and without shoes while ML-GRF and frontal kinematics were collected simultaneously. Subjects were divided into groups based upon their peak eversion (low pronation, middle pronation, high pronation). Discrete parameters from the ML-GRF were peak forces, respective times of occurrence, and impulses. No significant differences were found between groups regarding the magnitude of ML-GRF. Based upon the relative times of occurrence, the peak medial GRF occurred closer to the peak eversion than the peak lateral GRF. Findings support the idea that the ML-GRF have less to do with pronation than previous research suggested.
authors.affiliation: Nebraska Biomechanics Core Facility, University of Nebraska at Omaha, Omaha, NE, USA.
authors.forename: Joanna B
authors.initials: JB
authors.lastname: Morley
authors.forename: Leslie M
authors.initials: LM
authors.lastname: Decker
authors.forename: Tracy
authors.initials: T
authors.lastname: Dierks
authors.forename: Daniel
authors.initials: D
authors.lastname: Blanke
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: French
authors.forename: Nicholas
authors.initials: N
authors.lastname: Stergiou
mesh_terms: D000843:Ankle Joint / Q000502:physiology*; D005260:Female; D005528:Foot / Q000502:physiology*; D006801:Humans; D008297:Male; D005082:Physical Exertion / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D012420:Running / Q000502:physiology*; D012775:Shoes; D013314:Stress, Mechanical; D055815:Young Adult