Experimental study of the influence of the m. tibialis anterior on the walk-to-run transition by means of a powered ankle-foot exoskeleton

P. Malcolm, V. Segers, I. Van Caekenberghe, D. De Clercq

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The purpose of this study was to investigate the role of the tibialis anterior (TA) in the walk-to-run transition (WRT) by means of an experimental manipulation that allows increasing or decreasing muscular effort of the TA around heel contact. Eight subjects performed five WRTs on an accelerating treadmill wearing a powered ankle-foot exoskeleton. There was a trend towards a lower WRT-speed in the condition in which the TA was resisted (2.06 ± 0.09 m s-1) than in the control condition (2.10 ± 0.10 m s-1). This finding could not be extrapolated in the opposite direction, as there was no significant difference between the assist and control condition. The TA activation burst around heel contact showed a pattern that led to the hypothesis that the TA activation reaches a critical level at the fourth last heel contact before the WRT which triggers the WRT. The fact that the results comply with previous transition studies emphasises the role of the TA as a determinant of the WRT.

Original languageEnglish (US)
Pages (from-to)6-10
Number of pages5
JournalGait and Posture
Volume29
Issue number1
DOIs
StatePublished - Jan 2009

Keywords

  • Bio-robotics
  • Gait transition
  • Locomotion
  • Powered exoskeleton
  • Tibialis anterior

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Rehabilitation

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