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01-12-2012 | Oral presentation | bijlage 1/2012 Open Access

Journal of Foot and Ankle Research 1/2012

Shock attenuation in shoes compared to barefoot: a systematic review

Tijdschrift:
Journal of Foot and Ankle Research > bijlage 1/2012
Auteurs:
Alycia Fong Yan, Claire Hiller, Peter Sinclair, Richard Smith

Background

The debate over the advantages and disadvantages of barefoot versus shod running has gained momentum recently [ 1, 2] with the retail market aiming to mimic the motion of the foot during barefoot gait[ 3]. The aim of this study was to conduct a systematic review of articles that compared shock attenuation in the shod condition to barefoot during weight bearing activity in healthy individuals.

Materials and methods

The major databases were searched for the following keywords: barefoot, foot, feet, boot*, shoe*, impact, shock, pressure, force, viscoelastic, and insert. Articles were screened with inclusion and exclusion criteria set a priori. Articles were grouped according to shoe type and where possible, a meta-analysis was used.

Results

Thirty-eight articles were found with 27 articles examining athletic shoes compared to barefoot. For running, footwear attenuated loading rate and tibial acceleration (Table 1). In contrast, the use of shoes increased vertical ground reaction forces (vGRF) during running (Table 1) and walking when measured at the impact transient. Results varied significantly in favour of the shod or barefoot condition depending on whether data was collected at the impact transient or the peak. Thirteen articles did not report the footfall technique, while two studies reported variable technique.
Table 1
Pooled effect of bare feet vs. athletic footwear during running (+’ve: attenuated in BF, –‘ve: attenuated in shod)
Variable
Time of Collection
# of Studies
n
Mean Difference [95% CI]
P Value
Vertical Ground Reaction Force
Impact Transient
De Wit et al 2000, Divert et al 2005, Esnault 1985, Lieberman et al 2010
108
0.22 [0.20, 0.23]
<0.00001
 
Peak Force
Alcantara et al 1996, Braunstein et al 2010, Dickinson et al 1986, Fong et al 2007, Kerrigan et al 2009, Serrao & Amadio 2001, Squadrone & Gallozzi 2009,Stockton & Dyson 1998
128
-0.03 [-0.07, 0.01]
0.19
Loading Rate
Impact Transient
De Wit 2000, Lieberman 2010
72
-3.56 [-4.10, -3.02]*
<0.00001
 
Peak Force
Alcantara 1996, Serrao & Amadio 2001
11
-0.59 [-2.52, 1.35]*
0.55
Tibial Acceleration
Peak Force
Alcantara et al 1996, McNair & Marshall 1994
18
-3.19 [-4.35, -2.03]*
<0.00001
*Standardised Mean Difference [95% CI]

Conclusions

Evidence suggests the shock absorbing properties of athletic footwear are effective during jump landings. Results varied significantly in favour of the shod or barefoot condition depending on whether data was collected at the impact transient or the peak. Footfall technique appears to have a significant effect on vertical ground reaction force. Activity-specific designs for footwear should take into account the region of the shoe which absorbs the initial impact. Attention should be given to develop consistent protocols for examining shock attenuation in footwear research.
This article is published under license to 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.

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