How do we define efficiency? In mechanics this has a very clear
definition. Why would PT be less efficient on a flat surface than an
uneven one?
On 20 Jul 2006, at 19:39, Maire Murphy wrote:
> Or wouldn't it be that the tib post is not working efficiently in a
> shod situation
> on a flat man made surface as opposed to barefoot over uneven terrain
> or even shod over uneven terrain.
>
> Maire Murphy
> [log in to unmask]
> ----- Original Message -----
> From: Simon Spooner
> To: [log in to unmask]
> Sent:Thursday, July 20, 2006 7:06 PM
> Subject:Re: Normal walking
>
> Dave,
>
> Any academic subject which you consider worthy of discussion is worthy
> of discussion. The fact that I gave my opinion on this should not end
> the discussion, feel free to explore the concepts as much as you like.
> However, as you know, in academic debate when someone makes a
> statement, it is customary to ask that individual to prove it. The
> shod foot may indeed be deprived somewhat of sensory input as Robbins
> suggested. What effect does skin surface temperature have on sensory
> input? OK at the moment were in the middle of a heat wave but what
> would happen to our sensory input during barefoot walking in winter?
> Nigg has done some work on this, so too I believe has Craig with
> somewhat different results. I don't understand your reasoning re: tib
> post in shod versus unshod given the same terrain? Explain please?
>
> I'm looking forward to developing my invisible sun theory.
> On 20 Jul 2006, at 18:27, David Smith wrote:
>
>
> Simon and all
>
> When I orignaly asked about natural ground versus man,made sufaces I
> was really using the forum to explore my thoughts. I was not claiming
> any new breakthrough or selling myself or a product. Do you think it
> is fair to discuss some subject of interest just to see what comes
> from it without first having proof by means of research etc.
> Now I of course know that similar things have been discussed before
> and Simon you have very clear views on the subject.
> I agree that in everyday ambulation the topography of the surfaces we
> walk on and the actions we make on those surfaces are highly variable.
> It would therefore seem unlikely that varying surface contours are
> being aetiological of chronic trauma, when comparing natural and man
> made surfaces. Also the point that Kevin makes about the likelyhood
> of more acute trauma occurring when ambulating on rough ground is
> valid. However this is where I think I am putting forward a different
> view.
> When walking shod over any surface it would seem we tend to have a
> gait strategy that keeps us in the heel toe pattern as much as
> possible. When walking barefoot over any surface but in particular
> natural surface we have other gait criteria which superceed the need
> to attain the heel toe pattern and therefore walk in that pattern far
> less often.
> Therefore it may be shoes which, for instance, allow us to disregard
> considerations about potential acute pain and/or not allow us to
> consider new sensory input or more stable foot placement. So even
> though the terrain per se may not cause repetitive traumatic stress,
> in terms of natural V's man made surfaces, the altered
> considerations to the way we walk may do so, in terms of shod V's
> unshod.
> Could it not be then that the post tib muscle for instance may repeat
> the same RoM more times per day when shod than when unshod and this
> would cause failure at some time.
> How this point, if proven, would help in the treatment of a generally
> shod population I don't know yet but surely discussing it can be
> helpful.
>
> Cheers Dave
>
>
> ----- Original Message -----
> From:Simon Spooner
> To:[log in to unmask]
> Sent:Wednesday, July 19, 2006 5:52 PM
> Subject:Re: Normal walking
>
> All,
>
> A nice text which explores the kinematics and kinetics of activities
> of daily living is:
>
> Functional Human Movement: Measurement and Analysis
> by Brian R. Durward (Editor), Gillian D. Baer (Editor), Philip J. Rowe
> (Editor)Publisher:Butterworth-Heinemann (May 1999)
>
> They talk about sitting from standing and vice versa, stair climbing,
> pointing and reaching etc. as well as walking and running.
>
> I USED to have a copy- if you are reading this and you have my copy- I
> won't name and shame but I do know you have it- I would like it back
> please. Thanks.
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