Welcome to poster #578 and winner of the ASB President’s Award for the best poster!!
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Self-pace treadmill controllers influence gait variability but not average walking speed
Purpose: To investigate how self-pace treadmill controller sensitivity affects walking speed, step length, and step width on different different slopes (decline, level, and incline).
Hypothesis: More sensitive self-pace controllers would have greater walking speed fluctuations, step length variability, and step width variability on all slopes.
Self-pace treadmills allow subjects to walk at their chosen walking speed while preserving natural gait fluctuations [1,2].
Equipment availability, laboratory space, and experiment design have led to a variety of custom self-pace controllers with different parameters, which may influence a subject's gait.
controller sensitivity did not affect average gait parameters but did affect gait variability
Curly brackets indicate significant differences between slopes within a given sensitivity shown as color coded asterisks, * low, * medium, * high (Tukey HSD, p<0.05). Square brackets with black asterisks indicate significant differences between sensitivities within a slope (Tukey HSD, p<0.05).
Increasing self-pace controller sensitivity:
- did not affect: 1) average walking speeds or gait parameters; 2) detrended variances; and 3) speed-trend step width variance
- resulted in increased 1) speed variance, 2) total step length variance, and 3) speed-trend step length variance.