[pct-l] footwear weight, was UL danger

[Yoshihiro Murakami]

I have introduced  the several  footwear experiments in
http://psycho01.edu.u-toyama.ac.jp/backpacking_memo.pdf  page 8-12.
The distribution of pdf file of whole article is a illegal act, so I
cited some important figures and data. You can easily recognized the
contents.  The memo was not organized and it should be re-written, but
I have no time now. In future, I  might be able to write some essay on
these materials.

Thanks very much.




2010/5/15 Timothy Nye <timpnye at gmail.com>:
> Along those lines please see the attached article.  Boots which restrict the
> articulation of the ankle joint may well play a role..
>
> On Fri, May 14, 2010 at 4:34 PM, Diane at Santa Barbara Hikes dot com <
> diane at santabarbarahikes.com> wrote:
>
>> About all this footwear and evolution and optimal walking speed...
>> Keep in mind we evolved to walk without any footwear at all.
>>
>> I have some footwear that has very little weight: New Balance MT
>> 100s. I have some other footwear that also has very little weight:
>> Feelmax Osmas.
>>
>> The difference between the two are the New Balance has cushioning and
>> a 10mm heel. The Feelmax Osma has no heel and no cushioning.
>>
>> On a surface that does not require cushioning, such as a smooth flat
>> surface with no painful rocks or anything to slow me down, I am
>> unable to walk as fast in the Feelmax as the New Balance. To attempt
>> to walk fast actually feels odd and unnatural. It seems that to go
>> fast, one must begin to run.
>>
>> In running shoes with maximum cushioning, it feels like more effort
>> to walk fast than in the lesser cushioned shoes I have. I believe
>> this is because it takes more effort to fold the shoe at the
>> breakpoint at the ball of the foot. In some other shoes I have that
>> are not cushioned and have a slight heel rise (I have several casual
>> shoes like this) I can walk very fast with very little effort
>> compared to the MT 100s and the other running shoes I have. So, no
>> heel rise slows me down, too much cushioning slows me down, but a
>> slight heel rise speeds me up.
>>
>> My point is that even if they measured heavy boots and light boots,
>> both kinds of boots had a heel rise. Whatever the optimal speed they
>> arrived at for walking was probably influenced by the heel rise and
>> possibly by other factors they forgot to add in such as the amount of
>> cushioning or stiffness in the sole. Because they tested people in
>> shoes, you really can't extrapolate from there exactly what is our
>> evolutionary endowment. I believe that we evolved to walk slowly and
>> to run when we need to go faster.
>>
>> Diane
>>
>>
>>
>> Books I've written:
>> ~ Piper's Flight
>> ~ Adventure and Magic
>> ~ Santa Barbara Hikes
>> http://stores.lulu.com/dianesoini
>>
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-- 
Sincerely
--------------- --------------------------------------
Hiro    ( Yoshihiro Murakami )
HP:http://psycho01.edu.u-toyama.ac.jp (Japanese)
http://picasaweb.google.co.jp/CompleteWalker/
Memo:http://psycho01.edu.u-toyama.ac.jp/backpacking_memo.pdf (English
+ Japanese)
Backpacking for 30 years in Japan
2009 JMT, the first America.
------------------------------------------------------