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Foot biomechanics- emerging paradigms

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Too many times theories of how the human foot functions and therefore how mechanically inducted foot problems are treated have been presented as if they were facts. The dogmatic adherence that sometimes ensues from such an approach has frequently stifled the evolution of foot mechanics. This has been particularly apparent in the field of podiatry which has been dominated by the Root paradigm. Briefly, the Root paradigm proposes that the human foot functions ideally around the subtalar joint’s neutral position. Additionally, the forefoot to rearfoot frontal plane relationship ideally should be perpendicular. Furthermore, deviations from those ideal positions are termed deformities. [1, 2]

Biomechanical treatments according to Root are intended to re-align the foot so as to function around the neutral subtalar position and/or prevent frontal plane compensations from a deformed forefoot. In essence this paradigm is based on foot morphology.

Several studies have raised doubts as to the validity of the Root paradigm. [38] This abstract is a review of several papers which raise those doubts and explores emerging paradigms of human foot function which align more with current research findings on foot function.[911]

References

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    Root M, Orien W, Weed J: Biomechanical evaluation of the foot. Los Angeles: Clinical Biomechanics Corporation. 1971

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    Root M, Orien W, Weed J: Normal and Abnormal Function of the Foot. Los Angeles: Clinical Biomechanics Corporation. 1977, 2:

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    McPoil TG, Cornwall MW: The relationship between subtalar joint neutral position and rearfoot motion during walking. Foot Ankle Int. 1994, 15: 141-45. 10.1177/107110079401500309.

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    Payne CB: The past, present, and future of podiatric biomechanics. JAPMA. 1998, 88 (2): 53-63.

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    Lee WE: Podiatric biomechanics. An historical appraisal and discussion of the Root model as a clinical system of approach in the present context of theoretical uncertainty. Clin Podiatr Med Surg. 2001, 18 (4): 555-684.

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    Nigg BM, Nurse MA, Stefanyshyn DJ: Shoe inserts and orthotics for sport and physical activities. Medicine and Science in Sports and Exercise. 1999, 31: S421-8. 10.1097/00005768-199907001-00003.

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    Stacoff A, Reinschmidt C, Nigg BM, van den Bogert AJ, Lundberg A, Denoth J, Stussi E: Effects of foot orthoses on skeletal motion during running. Clinical Biomechanics. 2000, 15: 54-64. 10.1016/S0268-0033(99)00028-5.

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    Heiderscheit B, Hamill J, Tiberio D: A biomechanical perspective: do foot orthoses work?. British Journal of Sports Medicine. 2001, 35: 4-5. 10.1136/bjsm.35.1.4.

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    Kirby K, Fuller E: Subtalar Joint Equilibrium and Tissue Stress Approach to Biomechanical Therapy of the Foot and Lower Extremity. Lower Extremity Biomechanics: Theory and Practice. Edited by: Albert SF, Curran SA. 2013, Denver, 1: 205-264. Bipedmed, 1

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    Whitney KA: Classification and Treatment of Congenital Sagittal Plane Deformity. Lower Extremity Biomechanics: Theory and Practice. Edited by: Albert SF, Curran SA. 2013, Denver, 1: 265-288. Bipedmed, 1

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    Curran SA: Sagittal Plane Facilitation of Motion Model and Associated Foot Pathologies. Lower Extremity Biomechanics: Theory and Practice. Edited by: Albert SF, Curran SA. 2013, Denver, 1: 289-315. Bipedmed, 1

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Correspondence to Stephen F Albert.

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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/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Albert, S.F. Foot biomechanics- emerging paradigms. J Foot Ankle Res 7, A1 (2014) doi:10.1186/1757-1146-7-S1-A1

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Keywords

  • Public Health
  • Research Finding
  • Frontal Plane
  • Neutral Position
  • Ideal Position