Notes on the margin of stability

Carolin Curtze, Tom J W Buurke, Christopher McCrum*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
50 Downloads (Pure)

Abstract

The concept of the 'extrapolated center of mass (XcoM)', introduced by Hof et al., (2005, J. Biomechanics 38 (1), p. 1–8), extends the classical inverted pendulum model to dynamic situations. The vector quantity XcoM combines the center of mass position plus its velocity divided by the pendulum eigenfrequency. In this concept, the margin of stability (MoS), i.e., the minimum signed distance from the XcoM to the boundaries of the base of support was proposed as a measure of dynamic stability. Here we describe the conceptual evolution of the XcoM, discuss key considerations in the estimation of the XcoM and MoS, and provide a critical perspective on the interpretation of the MoS as a measure of instantaneous mechanical stability.
Original languageEnglish
Article number112045
Number of pages8
JournalJournal of biomechanics
Volume166
Early online date8-Mar-2024
DOIs
Publication statusPublished - 13-Mar-2024

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