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Walking ground reaction forces (GRF) were recorded from a quartz force plate, whose surface was positioned above, below, and level with respect to a level walkway grade. Significant differences in selected GRF measures were found between the level condition and step-up heights >25 mm and step-down heights >-14.7 mm. No differences were found between the level condition and a step-up height of 6.7 mm. Implications were discussed regarding alterations in gait dynamics, and suggestions were provided regarding additions of suprastructures to quartz force plates.
ground reaction forces, force plate, step height, shoe/surface interface, walking gait
Biomechanics product manager, Kistler Instrument Corporation, Amherst, NY