Article

This paper presents a comparison of four different methods of identifying the
times of foot-strike and toe-off during running based on gait marker
trajectories. The event times predicted by the methods were compared to those
identified using a force plate for both over-ground and treadmill running. The
effect of using different threshold values for the detection of gait events using
force plate data was also investigated, and as a result, all assessments of event
detection accuracy were based on a cut-off value of 10N.
The most accurate method
of foot-strike detection depended on whether the runner landed with a rear- or a
mid-foot strike. For rear-foot-strike running, the best method of identifying
foot-strike used the vertical acceleration profile of the posterior heel distal
marker and the vertical position profile of the hallux marker. For
mid-foot-strike running, the best method of identifying foot-strike used the
vertical velocity profile of the mean positions of the posterior heel distal
marker and a marker midway between the second and third metatarsal heads. The
most accurate method of identifying toe-off did not depend on type of foot-strike
and was based on the vertical acceleration and position profiles of the hallux
marker.
CI - Copyright (c) 2010 Elsevier B.V. All rights reserved.

Langue : ANGLAIS