Walking in simulated Martian gravity: Influence of added weight on sagittal dynamic stability

Melissa M. Scott-Pandorf, Daniel P. O'Connor, Charles S. Layne, Krešimir Josić, Max J. Kurz

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


With human exploration of the Moon and Mars on the horizon, research considerations for space suit redesign have surfaced. Review of Apollo mission videos revealed repeated instance of falling during extravehicular activities. A better understanding of how suit weight influences the sagittal dynamic stability of the gait pattern may provide insight for new suit design such that space missions may have more productive extravehicular activities and smaller risk of falls that may cause injuries and damage equipment. Participants walked for 4 min in simulated Martian gravity with additional loads of 0%, 15%, 30% and 45% of their body weight. Floquet and Lyapunov analysis techniques were used to quantify the dynamic stability of the sagittal plane gait pattern. Additionally, sagittal plane joint kinematics were evaluated to determine if any modification occurred. Results indicated that weight (i.e., added load) had little effect on the sagittal dynamic stability or joint kinematics while in simulated Martian gravity. Potentially, suit weight may not be a priority for space suit redesign.

Original languageEnglish (US)
Pages (from-to)1341-1352
Number of pages12
JournalActa Astronautica
Issue number9-10
StatePublished - May 2010


  • Dynamic
  • Floquet analysis
  • Gait
  • Lyapunov exponent
  • Space suit

ASJC Scopus subject areas

  • Aerospace Engineering


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