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The purpose of this study was to propose a measure of symmetry/asymmetry for normal human gait and to quantify symmetries/asymmetries of normal human gait for selected gait variables using a force platform. Sixty-two subjects performed ten gait trials each, stepping on the force platform five times with each leg. From these gait trials a symmetry index was calculated for 34 gait variables. The upper and lower limits of normal gait were calculated such that 95% of all symmetry indices obtained from this subject population fell within these limits. Upper and lower limits were found to vary from +/- 4% to over +/- 13,000%. Extremely high percentages were found for variables which had absolute magnitudes close to zero and/or variables which occurred at distinctly different instants during the gait cycle. The results of these variables need to be interpreted with caution.
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Walter Herzog
Benno M. Nigg
Lynda Read
Medicine & Science in Sports & Exercise
University of Calgary
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Herzog et al. (Wed,) studied this question.
www.synapsesocial.com/papers/69dccae20de68e8319e539a0 — DOI: https://doi.org/10.1249/00005768-198902000-00020