Email updates

Keep up to date with the latest news and content from Journal of Foot and Ankle Research and BioMed Central.

This article is part of the supplement: Proceedings of the Australasian Podiatry Council Conference 2011

Open Access Oral presentation

Acute effects of a shoe with enhanced plantar sensory feedback on midfoot kinematics whilst walking

Simon Bartold1*, Adam Bryant1, Ross Clark1, Kade Paterson2 and Callan Ritchie2

Author Affiliations

1 The University of Melbourne, Parkville, Victoria, 3010, Australia

2 Australian Catholic University, Melbourne, Victoria, 3000, Australia

For all author emails, please log on.

Journal of Foot and Ankle Research 2011, 4(Suppl 1):O2  doi:10.1186/1757-1146-4-S1-O2


The electronic version of this article is the complete one and can be found online at: http://www.jfootankleres.com/content/4/S1/O2


Published:20 May 2011

© 2011 Bartold et al; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Background

Excessive foot pronation has been associated with injuries of the lower extremity. No research has investigated the effect of altering plantar sensation on foot pronation. The aim of this study was to determine whether a shoe with enhanced plantar sensory feedback could reduce midfoot pronation.

Methods

The midfoot kinematics of 21 males were recorded whilst walking in a neutral shoe, a neutral shoe with a foot orthotic and a neutral shoe with nodules located on the plantar medial aspect of the foot (experimental shoe). Electromyography of the peroneus longus, tibialis anterior and medial gastrocnemius was also recorded and analysed. A Friedman’s ANOVA was used to evaluate differences between shoe conditions, and a Wilcoxon signed ranks test was conducted to establish where the differences occurred.

Results

The results demonstrated that midfoot-tibia angles were significantly more supinated during the loading phase when wearing the experimental shoe (median = 47.70°) than when wearing a neutral shoe (median = 41.50°; p = 0.008) or a neutral shoe with a foot orthotic (median = 42.17°; p=0.008). In the midstance phase, supination angles in both the orthotic and experimental shoes were higher than that of the neutral shoe, with the former reaching significance (median = 19.56°; p = 0.006). During the propulsive phase findings were similar, with a significantly more supinated position in the experimental shoe (median = 48.30) than the neutral shoe (median = 37.47°; p = 0.006) or the neutral shoe with a foot orthotic (median = 40.87°; p=0.010). No significant differences were observed for any muscle group at any stage of the gait cycle.

Conclusions

Increasing plantar sensory feedback to the medial aspect of the foot reduces midfoot pronation during an acute bout of walking.this may have important implications in relation to our prescription of both athletic footwear and orthotic devices. Further work is needed to explore whether these effects remain over longer time periods.