The medial longitudinal arch plays a major role in determining lower extremity kinematics. Thus, it is necessary to understand the dynamics of the arch structure in response to load. The purpose of this study was to examine arch function in high- and low-arched feet during a vertical loading condition. Ten high- and ten low-arched females performed five trials in a sit-to-stand exercise. Ground reaction force (1200 Hz) and three-dimensional kinematics (240 Hz) were collected simultaneously. The high-and low-arched athletes had no differences in vertical deformation of the arch. High-arched participants were less everted than the low-arched athletes; furthermore, the high-arched athletes had smaller mid-forefoot eversion excursions. Differences between the high-arched and low-arched athletes occur through and motion at the mid-forefoot joint.
Douglas W. Powell (Corresponding Author) is with the Department of Health and Human Performance, Fairmont State University, Fairmont, West Virginia. Benjamin Long is with the Human Performance and Biodynamics Laboratory, Winston-Salem State University, Winston-Salem, NC. Clare E. Milner and Songning Zhang are with the Department of Recreation, Sport & Leisure Studies, University of Tennessee, Knoxville, TN.