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Classification for Medial Longitudinal Arch Height

by MASS4D® Prescription Orthotics November 29, 2016


Navicular Height (NH), Longitudinal Arch Angle (LAA) and Feiss Line (FL) were utilised by Nilsson et al "to identify cut-off values for maximum values and ROM of the MLA of the foot during static tests and to identify factors influencing foot posture".

This 2012 article published in Journal of Foot and Ankle Research (doi: 10.1186/1757-1146-5-3) utilised an impressive 254 subjects and found no statistical difference based on right vs left foot analysis.

Prediction intervals of 68% and 95% were established.

Establishing or disproving a link between arch height and arch movement and its relationship to injury was the ultimate goal of this study.

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The authors were successful in developing a categorisation system for different foot arch types during standing.

The results of this study were in part that "the 68% cut-off values for maximum MLA values and MLA ROM for NH were 3.6 to 5.5 cm and 0.6 to 1.8 cm, respectively.

Normal maximum LAA values were between 131 and 152° and normal LAA ROM was between -1 and 13°.

Normal maximum FL values were between -2.6 and -1.2 cm and normal FL ROM was between -0.1 and 0.9 cm"

This study provides ample inspiration for additional research on arch height, movement and development of injury.

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  1. Mette Kjærgaard Nilsson, Rikke Friis, Maria Skjoldahl Michaelsen, Patrick Abildgaard Jakobsen, Rasmus Oestergaard Nielsen (2012) Classification of the height and flexibility of the medial longitudinal arch of the foot. Journal of Foot and Ankle Research: February 17, 2012, Vol. 5, No.3, doi: 10.1186/1757-1146-5-3

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