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View Full Version : FW: Normal gait: Are joint angle standard deviations larger at maximal joint angular velocities?



Forner Cordero, A. (ctw)
03-14-2003, 09:26 PM
> From: Forner cordero, A. (CTW)
> Sent: sábado, 15 de marzo de 2003 12:10
> To: BIOMCH-L (E-mail)
> Subject: Normal gait: Are standard deviations larger at maximal joint
> angular velocities?
>
> Hello,
> I measured normal walking on a treadmill, calculated the joint angles and
> angular velocities (sagittal plane), converted to stride percentage and
> then computed the mean and the standard deviation at every point. I find
> that at the hip, knee and ankle joints the maximal standard devations
> occurred when the joint angular velocity is maximal.
> I searched the bibliography and Internet resources looking for results
> that confirm this observation. I did not find any reference to this
> "strange thing". So I ask you if this is a finding or a particular error.
>
> My question is: Are standard deviations larger at maximal joint angular
> velocities?
> If this is a true repeatable observation of many of you I would like to
> discuss about possible causes and different approaches to perform a "time
> normalisation" or,... to avoid it definitively.
>
> Arturo FORNER CORDERO
> PhD Student.
> Mechanical Engineering
> University of Twente. The Netherlands

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