Energy-based dynamic index for human body stability evaluation

Ming Wu, Linhong Ji*, Dewen Jin, Jichuan Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Four healthy male subjects were recruited to verify the validity of a dynamic index based on an energy threshold for evaluating the stability of the human body while standing. They were disturbed by different intensity forces in 23 trials while standing upright. The predictive accuracy of the dynamic index for stepping was 83% while that for standing still was 65%. The simulation predictions using the energy-based threshold match well with the experimental results, and the dynamic evaluation index shows better predictive capacity (70%) than the static mode] (52%) for all cases. The energy-based dynamic index accurately evaluates human body stability during motion, especially for high center of mass velocities. The energy-based stability reserve can be used as a quantitative index to evaluate human body stability during motion and served for patient rehabilitation and robot design.

Original languageEnglish (US)
Pages (from-to)640-643
Number of pages4
JournalQinghua Daxue Xuebao/Journal of Tsinghua University
Issue number5
StatePublished - May 1 2003


  • Balance
  • Dynamic stability evaluation index
  • Rehabilitation medical engineering
  • Stability reserve

ASJC Scopus subject areas

  • General Engineering


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