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Prediction of human gait parameters from temporal measures of foot-ground contactInvestigation of the influence of human physical activity on bone functional adaptation requires long-term histories of gait-related ground reaction force (GRF). Towards a simpler portable GRF measurement, we hypothesized that: 1) the reciprocal of foot-ground contact time (1/tc); or 2) the reciprocal of stride-period-normalized contact time (T/tc) predict peak vertical and horizontal GRF, loading rates, and horizontal speed during gait. GRF data were collected from 24 subjects while they walked and ran at a variety of speeds. Linear regression and ANCOVA determined the dependence of gait parameters on 1/tc and T/tc, and prediction SE. All parameters were significantly correlated to 1/tc and T/tc. The closest pooled relationship existed between peak running vertical GRF and T/tc (r2 = 0.896; SE = 3.6%) and improved with subject-specific regression (r2 = 0.970; SE = 2.2%). We conclude that temporal measures can predict force parameters of gait and may represent an alternative to direct GRF measurements for determining daily histories of habitual lower limb loading quantities necessary to quantify a bone remodeling stimulus.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Breit, G. A.
(NASA Ames Research Center Moffett Field, CA United States)
Whalen, R. T.
Date Acquired
August 22, 2013
Publication Date
April 1, 1997
Publication Information
Publication: Medicine and science in sports and exercise
Volume: 29
Issue: 4
ISSN: 0195-9131
Subject Category
Life Sciences (General)
Distribution Limits
NASA Discipline Musculoskeletal

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