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Two Independent Contributions to Step Variability during Over-Ground Human Walking

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  • Steven H Collins
  • Arthur D Kuo

Abstract

Human walking exhibits small variations in both step length and step width, some of which may be related to active balance control. Lateral balance is thought to require integrative sensorimotor control through adjustment of step width rather than length, contributing to greater variability in step width. Here we propose that step length variations are largely explained by the typical human preference for step length to increase with walking speed, which itself normally exhibits some slow and spontaneous fluctuation. In contrast, step width variations should have little relation to speed if they are produced more for lateral balance. As a test, we examined hundreds of overground walking steps by healthy young adults (N = 14, age

Suggested Citation

  • Steven H Collins & Arthur D Kuo, 2013. "Two Independent Contributions to Step Variability during Over-Ground Human Walking," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-1, August.
    • Handle: RePEc:plo:pone00:0073597
    DOI: 10.1371/journal.pone.0073597
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    References listed on IDEAS

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    1. Jonathan B Dingwell & Joby John & Joseph P Cusumano, 2010. "Do Humans Optimally Exploit Redundancy to Control Step Variability in Walking?," PLOS Computational Biology, Public Library of Science, vol. 6(7), pages 1-15, July.
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