Title
The mechanical characteristics of the human heel pad during foot strike in running : an in vivo cineradiographic study The mechanical characteristics of the human heel pad during foot strike in running : an in vivo cineradiographic study
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Biology
Source (journal)
Journal of biomechanics. - New York, N.Y.
Volume/pages
27(1994) :10 , p. 1213-1222
ISSN
0021-9290
ISI
A1994PD27800002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The compressive properties of the heel pad during the heel strike when running (barefoot and shed, two subjects, 4.5 m s(-1)) were studied by means of a high-speed two-dimensional cineradiographic registration (150 frames s(-1)) of an actual running step. Vertical ground reaction forces were measured with a force platform. In barefoot running the heel pad deforms to a maximal percentage deformation of 60.5 +/- 5.5%. In shed running the heel pad deforms only 35.5 +/- 2.5% and the nonlinear force-deformation relationship reflects an increasing stiffness when deformation rises. Although the amplitudes of the vertical ground reaction forces do not differ notably in both conditions, barefoot running implies a maximal deformation to the fatty heel tissue, reducing its functional role from shock reduction towards local protection of the heel bone. It is argued that embedding the foot in a well-fitting shoe increases the effective stiffness of the heel pad.
E-info
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