The foot and ankle structures reveal emergent properties analogous to passive springs during human walking

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  • Additional Information
    • Publication Information:
      Public Library of Science
    • Publication Date:
      2019
    • Abstract:
      An objective understanding of human foot and ankle function can drive innovations of bio-inspired wearable devices. Specifically, knowledge regarding how mechanical force and work are produced within the human foot-ankle structures can help determine what type of materials or components are required to engineer devices. In this study, we characterized the combined functions of the foot and ankle structures during walking by synthesizing the total force, displacement, and work profiles from structures distal to the shank. Eleven healthy adults walked at four scaled speeds. We quantified the ground reaction force and center-of-pressure displacement in the shank's coordinate system during stance phase and the total mechanical work done by these structures. This comprehensive analysis revealed emergent properties of foot-ankle structures that are analogous to passive springs: these structures compressed and recoiled along the longitudinal axis of the shank, and performed near zero or negative net mechanical work across a range of walking speeds. Moreover, the subject-to-subject variability in peak force, total displacement, and work were well explained by three simple factors: body height, mass, and walking speed. We created a regression-based model of stance phase mechanics that can inform the design and customization of wearable devices that may have biomimetic or non-biomimetic structures.
    • ISSN:
      1932-6203
    • Rights:
      COPYRIGHT 2019 Public Library of Science
      Copyright 2019 Gale, Cengage Learning. All rights reserved.
    • Accession Number:
      edsgcl.588041585
  • Citations
    • ABNT:
      HEDRICK, E. A.; STANHOPE, S. J.; TAKAHASHI, K. Z. The foot and ankle structures reveal emergent properties analogous to passive springs during human walking. PLoS ONE, [s. l.], n. 6, 2019. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585. Acesso em: 17 fev. 2020.
    • AMA:
      Hedrick EA, Stanhope SJ, Takahashi KZ. The foot and ankle structures reveal emergent properties analogous to passive springs during human walking. PLoS ONE. 2019;(6). http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585. Accessed February 17, 2020.
    • APA:
      Hedrick, E. A., Stanhope, S. J., & Takahashi, K. Z. (2019). The foot and ankle structures reveal emergent properties analogous to passive springs during human walking. PLoS ONE, 6.
    • Chicago/Turabian: Author-Date:
      Hedrick, Erica A., Steven J. Stanhope, and Kota Z. Takahashi. 2019. “The Foot and Ankle Structures Reveal Emergent Properties Analogous to Passive Springs during Human Walking.” PLoS ONE, no. 6. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585.
    • Harvard:
      Hedrick, E. A., Stanhope, S. J. and Takahashi, K. Z. (2019) ‘The foot and ankle structures reveal emergent properties analogous to passive springs during human walking’, PLoS ONE, (6). Available at: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585 (Accessed: 17 February 2020).
    • Harvard: Australian:
      Hedrick, EA, Stanhope, SJ & Takahashi, KZ 2019, ‘The foot and ankle structures reveal emergent properties analogous to passive springs during human walking’, PLoS ONE, no. 6, viewed 17 February 2020, .
    • MLA:
      Hedrick, Erica A., et al. “The Foot and Ankle Structures Reveal Emergent Properties Analogous to Passive Springs during Human Walking.” PLoS ONE, no. 6, 2019. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585.
    • Chicago/Turabian: Humanities:
      Hedrick, Erica A., Steven J. Stanhope, and Kota Z. Takahashi. “The Foot and Ankle Structures Reveal Emergent Properties Analogous to Passive Springs during Human Walking.” PLoS ONE, no. 6 (2019). http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585.
    • Vancouver/ICMJE:
      Hedrick EA, Stanhope SJ, Takahashi KZ. The foot and ankle structures reveal emergent properties analogous to passive springs during human walking. PLoS ONE [Internet]. 2019 [cited 2020 Feb 17];(6). Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsgov&AN=edsgcl.588041585