The accuracy of step variability estimates is proportional to the number of steps that are collected.
Older individuals are usually more cautious, walk more slowly, take shorter steps, and exhibit increased step-to-step variability.
This ecological approach exploited the intrinsic biomechanical properties of the body in order to improve performance42, and preserved the step-to-step variability that contributes to increasing spinal neuroplasticity43.
Results showed a low step-to-step variability of each subject, but a high subject-to-subject variability in local extrema of body-weight normalized forces and moments and impulse data.
2/In the second step, variability parameters were calculated for the 100 imputed datasets.
Because of natural step-to-step variability [ 18], data from several footfalls was gathered to obtain a representative profile of the subject's foot.
Diabetic patients with peripheral neuropathy have lower gait velocity, decreased cadence, shorter stride length, increased stance time and higher step to step variability compared with healthy controls [ 3].
For the main analysis, scores after death were set to zero [ 34, 35 ]. 2/ In the second step, variability parameters were calculated for the 100 imputed datasets.
Similarly Mak [ 33], using the same treadmill system, concluded that Parkinson's disease primarily reflected a disturbance of step length regulation (rather than step variability) on the basis that step length was selectively reduced by 2 cm in Parkinson's disease during a dual task experiment.
Gait performance was measured by temporal and spatial gait variables (speed, cadence, stride length, stride time, double support [as percentage of stride time], step width, step time variability, and Walk-Ratio defined as step length/cadence-ratio [ 35]) using a GAITRite® system (CIR Systems Inc., Havertown, PA).
