Incorporating subject-specific geometry to compare metatarsal stress during running with different foot strike patterns
Ellison, M; Kenny, M; Fulford, J; et al.Javadi, A; Rice, H
Date: 9 April 2020
Journal
Journal of Biomechanics
Publisher
Elsevier
Publisher DOI
Abstract
Stress fracture of the second metatarsal is a common and problematic injury for
runners. The choice of foot strike pattern is known to affect external kinetics and
kinematics but its effect on internal loading of the metatarsals is not well understood.
Subject-specific models of the second metatarsal can be used to investigate ...
Stress fracture of the second metatarsal is a common and problematic injury for
runners. The choice of foot strike pattern is known to affect external kinetics and
kinematics but its effect on internal loading of the metatarsals is not well understood.
Subject-specific models of the second metatarsal can be used to investigate internal
loading in a non-invasive manner. This study aimed to compare second metatarsal
stress between habitual rearfoot and non-rearfoot strikers during barefoot running,
using a novel subject-specific mathematical model, including accurate metatarsal
geometry. Synchronised force and kinematic data were collected during barefoot
overground running from 20 participants (12 rearfoot strikers). Stresses were
calculated at the plantar and dorsal periphery of the midshaft of the metatarsal using
a subject-specific beam theory model. Non-rearfoot strikers demonstrated greater
external loading, bending moments and compressive forces than rearfoot strikers, but
there were no difference in peak stresses between groups. Statistical parametric
analysis revealed that non-rearfoot strikers had greater second metatarsal stresses
during early stance but that there was no difference in peak stresses. This emphasises
the importance of bone geometry when estimating bone stress and supports the
suggestion that external forces should not be assumed to be representative of internal
loading.
Sport and Health Sciences
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Except where otherwise noted, this item's licence is described as © 2020. Open access under a Creative Commons licence: https://creativecommons.org/licenses/by/4.0/