PMID: 11310866Apr 20, 2001Paper

The relationship between excessive pronation as measured by navicular drop and isokinetic strength of the ankle musculature

Foot & Ankle International
A G Snook

Abstract

EMG research has shown that excessive pronation affects the timing and magnitude of extrinsic muscle activity. This study was designed to investigate the relationship between excessive pronation and isokinetic strength of the ankle. The following measures were performed on 24 subjects (12 pronators, 12 normals) matched for gender and weight: 1) plantarflexion, dorsiflexion, inversion and eversion strength, both eccentrically and concentrically, determined by isokinetic peak torque at 30 degrees/sec; and 2) excessive pronation determined by navicular drop. Subjects with excessive pronation were found to have no difference in invertor strength, but decreased concentric plantarflexion strength when compared to normals. This finding agrees with biomechanical theory suggesting that a pronated foot is less rigid and generates less torque. Differences in strength ratios in excessive pronators were also observed and attributed to the decrease in plantarflexion strength.

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Citations

Jul 8, 2011·Foot & Ankle International·Elizabeth R HagemanGary A Mirka
Oct 10, 2019·Foot & Ankle International·Önder Murat HürmeydanÖnder İsmet Kılıçoğlu
Nov 29, 2005·Foot & Ankle International·Pedro R Gutiérrez, Manuel Herrera Lara
Dec 15, 2006·Pain Practice : the Official Journal of World Institute of Pain·Phillip S SizerOmer Matthijs
Jan 24, 2014·Acta ortopedica brasileira·Vinicius Machado de OliveiraMarcus Peikriszwili Tartaruga
Mar 3, 2020·Frontiers in Pediatrics·Philip J Bresnahan, Mario A Juanto
May 19, 2006·Journal of the American Podiatric Medical Association·Vanessa L NubéDennis K Yue
Jul 7, 2018·Physiotherapy Theory and Practice·Shane McClintonTimothy W Flynn
Oct 11, 2019·Frontiers in Sports and Active Living·Romain TourillonFrançois Fourchet

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