Ankle and midtarsal joint quasi-stiffness during walking with added mass

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  • Additional Information
    • Publication Information:
      PeerJ. Ltd.
    • Publication Date:
      2019
    • Abstract:
      Author(s): Andrew M. Kern (1), Nikolaos Papachatzis (1), Jeffrey M. Patterson (1), Dustin A. Bruening (2), Kota Z. Takahashi (1) Introduction Humans dynamically alter the stiffness of their limbs in [...]
      Examination of how the ankle and midtarsal joints modulate stiffness in response to increased force demand will aid understanding of overall limb function and inform the development of bio-inspired assistive and robotic devices. The purpose of this study is to identify how ankle and midtarsal joint quasi-stiffness are affected by added body mass during over-ground walking. Healthy participants walked barefoot over-ground at 1.25 m/s wearing a weighted vest with 0%, 15% and 30% additional body mass. The effect of added mass was investigated on ankle and midtarsal joint range of motion (ROM), peak moment and quasi-stiffness. Joint quasi-stiffness was broken into two phases, dorsiflexion (DF) and plantarflexion (PF), representing approximately linear regions of their moment-angle curve. Added mass significantly increased ankle joint quasi-stiffness in DF (p 0.001) and PF (p 0.001), as well as midtarsal joint quasi-stiffness in DF (p 0.006) and PF (p 0.001). Notably, the midtarsal joint quasi-stiffness during DF was ~2.5 times higher than that of the ankle joint. The increase in midtarsal quasi-stiffness when walking with added mass could not be explained by the windlass mechanism, as the ROM of the metatarsophalangeal joints was not correlated with midtarsal joint quasi-stiffness (r = -0.142, p = 0.540). The likely source for the quasi-stiffness modulation may be from active foot muscles, however, future research is needed to confirm which anatomical structures (passive or active) contribute to the overall joint quasi-stiffness across locomotor tasks.
    • ISSN:
      2167-8359
    • Accession Number:
      10.7717/peerj.7487
    • Rights:
      Copyright 2019 Gale, Cengage Learning. All rights reserved.
      COPYRIGHT 2019 COPYRIGHT 2012-2015 PeerJ, Inc / Public user content licensed CC-BY 4.0 unless otherwise specified. Content is available for free at https://peerj.com/
    • Accession Number:
      edsgcl.600049657
  • Citations
    • ABNT:
      KERN, A. M. et al. Ankle and midtarsal joint quasi-stiffness during walking with added mass. PeerJ, [s. l.], 2019. DOI 10.7717/peerj.7487. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsghw&AN=edsgcl.600049657. Acesso em: 20 fev. 2020.
    • AMA:
      Kern AM, Papachatzis N, Patterson JM, Bruening DA, Takahashi KZ. Ankle and midtarsal joint quasi-stiffness during walking with added mass. PeerJ. 2019. doi:10.7717/peerj.7487.
    • APA:
      Kern, A. M., Papachatzis, N., Patterson, J. M., Bruening, D. A., & Takahashi, K. Z. (2019). Ankle and midtarsal joint quasi-stiffness during walking with added mass. PeerJ. https://doi.org/10.7717/peerj.7487
    • Chicago/Turabian: Author-Date:
      Kern, Andrew M., Nikolaos Papachatzis, Jeffrey M. Patterson, Dustin A. Bruening, and Kota Z. Takahashi. 2019. “Ankle and Midtarsal Joint Quasi-Stiffness during Walking with Added Mass.” PeerJ. doi:10.7717/peerj.7487.
    • Harvard:
      Kern, A. M. et al. (2019) ‘Ankle and midtarsal joint quasi-stiffness during walking with added mass’, PeerJ. doi: 10.7717/peerj.7487.
    • Harvard: Australian:
      Kern, AM, Papachatzis, N, Patterson, JM, Bruening, DA & Takahashi, KZ 2019, ‘Ankle and midtarsal joint quasi-stiffness during walking with added mass’, PeerJ, viewed 20 February 2020, .
    • MLA:
      Kern, Andrew M., et al. “Ankle and Midtarsal Joint Quasi-Stiffness during Walking with Added Mass.” PeerJ, 2019. EBSCOhost, doi:10.7717/peerj.7487.
    • Chicago/Turabian: Humanities:
      Kern, Andrew M., Nikolaos Papachatzis, Jeffrey M. Patterson, Dustin A. Bruening, and Kota Z. Takahashi. “Ankle and Midtarsal Joint Quasi-Stiffness during Walking with Added Mass.” PeerJ, 2019. doi:10.7717/peerj.7487.
    • Vancouver/ICMJE:
      Kern AM, Papachatzis N, Patterson JM, Bruening DA, Takahashi KZ. Ankle and midtarsal joint quasi-stiffness during walking with added mass. PeerJ [Internet]. 2019 [cited 2020 Feb 20]; Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsghw&AN=edsgcl.600049657