Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61480
Title: Effects of training in minimalist shoes on the intrinsic and extrinsic foot muscle volume
Authors: Chen, TLW
Sze, LKY
Davis, IS
Cheung, RTH 
Keywords: Magnetic resonance image
Minimal footwear
Running
Strength
Issue Date: 2016
Publisher: Pergamon Press
Source: Clinical biomechanics, 2016, v. 36, p. 8-13 How to cite?
Journal: Clinical biomechanics 
Abstract: Background Minimalist shoes have gained popularity recently because it is speculated to strengthen the foot muscles and foot arches, which may help to resist injuries. However, previous studies provided limited evidence supporting the link between changes in muscle size and footwear transition. Therefore, this study sought to examine the effects of minimalist shoes on the intrinsic and extrinsic foot muscle volume in habitual shod runners. The relationship between participants' compliance with the minimalist shoes and changes in muscle õvolume was also evaluated. Methods Twenty habitual shod runners underwent a 6-month self-monitoring training program designed for minimalist shoe transition. Another 18 characteristics-matched shod runners were also introduced with the same program but they maintained running practice with standard shoes. Runners were monitored using an online surveillance platform during the program. We measured overall intrinsic and extrinsic foot muscle volume before and after the program using MRI scans. Findings Runners in the experimental group exhibited significantly larger leg (P = 0.01, Cohen's d = 0.62) and foot (P < 0.01, Cohen's d = 0.54) muscle after transition. Foot muscle growth was mainly contributed by the forefoot (P < 0.01, Cohen's d = 0.64) but not the rearfoot muscle (P = 0.10, Cohen's d = 0.30). Leg and foot muscle volume of runners in the control group remained similar after the program (P = 0.33-0.95). A significant positive correlation was found between participants' compliance with the minimalist shoes and changes in leg muscle volume (r = 0.51; P = 0.02). Interpretation Habitual shod runners who transitioned to minimalist shoes demonstrated significant increase in leg and foot muscle volume. Additionally, the increase in leg muscle volume was significantly correlated associated with the compliance of minimalist shoe use.
URI: http://hdl.handle.net/10397/61480
ISSN: 0268-0033
EISSN: 1879-1271
DOI: 10.1016/j.clinbiomech.2016.05.010
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