The theory on ‘gravity-driven horizontal locomotion’ is flawed: a commentary on ‘Gravity-driven horizontal locomotion: theory and experiment’ by Kanstad & Kononoff (2015)

Research output: Contribution to JournalComment / Letter to the editorAcademic

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Abstract

In a recent paper, Kanstad & Kononoff (Proc. R.Soc. A 471, 20150287. (doi:10.1098/rspa.2015.0287)) presented a theoretical analysis of the mechanical energetics of a particular style of human walking and running. According to their analysis, the force of gravity provides energy when this style of horizontal walking/running is adopted. Furthermore, Kanstad & Kononoff suggested that uphill walking at zero energy cost is possible when the suggested style of walking is adopted. In this commentary, we argue that these claims violate the basic laws of thermodynamics, and are based on erroneous application of the basic laws of classical mechanics.

Original languageEnglish
Article number683
JournalProceedings of the Royal Society. Series A, Mathematical, physical and engineering sciences
Volume473
Issue number2197
DOIs
Publication statusPublished - 18 Jan 2017

Keywords

  • Energetics
  • Human
  • Locomotion

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