[pct-l] to prevent injury

Blanchard, Sym SWB3 at pge.com
Sun Sep 23 18:41:58 CDT 2012


With all due respect, none of your studies specifically addressed the effect of hip belts on ankle injuries.

There are other methods besides empirical studies to determine the possibility of a theory.  As an engineer, I could do a dynamic stress analysis on paper to measure the forces on an ankle when a  mass is rigidly fixed to a quickly falling spine and body.  I have not done so.  But my engineering experience (31 years), my engineering intuition, and my personal antidotal experience tells me that this is a distinct possibility.   I think most engineers, including Ray Jardine (also an engineer), would naturally get the same sense of the result of these forces acting on a falling body.

By your reasoning, people should have continued smoking throughout the 1940's and 1950's until all the empirical studies were completed in the 1960's showing that smoking could cause cancer.

 I greatly appreciate your input and research.  This process  helps unravel some of life's little mysteries.  I think we can agree to disagree on this one.  But please let me know if you see other studies which more specifically address this situation.

Symbiosis
Skykomish, Washington

On Sep 23, 2012, at 4:11 PM, "Yoshihiro Murakami" <completewalker at gmail.com> wrote:

> Dear Sym
> 
> "Absence of evidence is not evidence of absence" is wrong. Absence of
> evidence is just absence. The thinking without evidence is only  an
> imagination.
> 
> Concerning ankle injury, there are several related researches.
> 
> Rowson S., McNally C.,\& Duma S.M. \ \ 2010 \ \ Can footwear affect
> achilles tendon loading? { \it Clinical Journal of Sport Medicine},
> 20, 344-349.}
> indicated high cut boots reduced 9.9% of maximal shock.
> 
> Boehm , H.,\& Hoesl, M. \ \ 2010 \ \ Effect of boot shaft stiffness on
> stability joint energy and muscular co-contraction during walking on
> uneven surface. {\it Journal of Biomechanics, 43, 2467-2472} }
> indicated stiff boots reduced the stress of ankles, but increased the
> stress of knee joints.
> 
> Handoll, H.H., Rowe, B.H., Quinn, K.M., de Bie, R. \ \ 2001 \ \
> Interventions for preventing ankle ligament injuries(Reviews). {\it
> Cochrane Database Systematic Review}, 2001;(3):CD000018.  indicated
> the support function of boots ( no direct evidence but the supporter
> -Air Cast-- had clear supportive function)
> 
> On these facts, I simply thinks shoes wearer  prone to suffer ankle
> injury. Then the shoes wearer should train their calf and ankles. I
> don't know which is the better training method. That is: I don't know
> "half Bocce ball".
> 
> There are many wrong ideas and knowledge in Ray Jardine's books.
> 
> 
> 
> 2012/9/24 Blanchard, Sym <SWB3 at pge.com>:
>> My bad.  I hit the send button accidentally.  Gotta love this iPhone keyboard.
>> 
>> The third paragraph should read as follows:
>> 
>> 
>> I do disagree with the notion that no published studies showing that wearing a hip belt can cause ankle injuries disproves the case .  Absence of evidence is not evidence of absence.  I doubt there has been funding or interest to specifically look at this issue, in particular affecting older hikers who just completed 2645 miles and whose support muscles may be fatigued.
>> 
>> I would think that ankle exercises on a half Bocce ball would be a better exercise to prevent ankle exercises than wind sprints.
>> 
>> Symbiosis
>> 
>> On Sep 23, 2012, at 2:22 PM, "Blanchard, Sym" <SWB3 at pge.com<mailto:SWB3 at pge.com>> wrote:
>> 
>> I agree that if you have to wear a heavy pack or if you have back issues, then a cinched hip belt would be a good idea.
>> However it is my opinion that this can also increase the chance of ankle injuries.
>> 
>> I think that trekking poles can help reduce this risk, but then there are the inherent disadvantages with poles (inefficient, cumbersome, tripping hazard...).   No such thing as a free lunch.
>> 
>> I do disagree with the notion that wearing a hip belt can not  cause  Absence of evidence is not evidence of absenceproves
>> 
>> Thanks,
>> Sym Blanchard
>> 925-588-9478
>> 
>> On Sep 20, 2012, at 4:17 PM, "Yoshihiro Murakami" <completewalker at gmail.com<mailto:completewalker at gmail.com>> wrote:
>> 
>> Thanks Melanie
>> 
>> The waist belt of backpack has  very important role to support heavy
>> load, as a result, the stress of spine is minimized.  If the total
>> pack weight is less than 10 kg, waist belt may be unnecessary. I just
>> pointed out no research may be exist concerning waist belt. But, it's
>> importance is very clear, so the many backpack makers never abolish
>> waist belt.
>> 
>> I have just write my blog : if you have a time, please see. I wrote my
>> blog in Japanese and English. I cannot write English properly but I
>> think better than Google translator.
>> 
>> My maximal total pack weight may be 38 kg or more:
>> 
>> https://picasaweb.google.com/104620544810418955412/FromSouthLkToLonePine?feat=flashalbum#5783126003499446338
>> 
>> I carried 20 days food ( for two persons 10 days ) and all the stuff,
>> and guided my wife South Lake to Lone Pine. We did not lose weight,
>> and suffered no injury.
>> 
>> Recently, I bought new backpack ( Altra 75 ) and tested at the
>> neighborhood Mountain. It worked well. I always carry backpack on the
>> hip bone, not on the shoulders.
>> 
>> https://sites.google.com/site/completewalker/equipments/backpack/altra-75
>> https://picasaweb.google.com/104620544810418955412/MtHakubaToKeyakidairaSt
>> 
>> for Tim, I think he may know himself.
>> 
>> He should work on rehabilitation as soon as possible. When his bone
>> became strong enough, he should train his muscle of lower legs. It is
>> necessary to reinforce his muscular strength and agility. Then the
>> possibility of injury becomes small.
>> 
>> 
>> 
>> 
>> 
>> --
>> Sincerely
>> --------------- --------------------------------------
>> Hiro    ( Yoshihiro Murakami  村上宣寛 )
>> facebook  http://www.facebook.com/completewalker
>> Blogs  http://completewalker.blogspot.jp/
>> Photo  https://picasaweb.google.com/104620544810418955412/
>> Backpacking since about 1980 in Japan
>> JMT, 2009, 2010, 2011(half), 2012
>> Handbook of Hiking will be published in 2013
>> ------------------------------------------------------
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> 
> 
> 
> -- 
> Sincerely
> --------------- --------------------------------------
> Hiro    ( Yoshihiro Murakami  村上宣寛 )
> facebook  http://www.facebook.com/completewalker
> Blogs  http://completewalker.blogspot.jp/
> Photo  https://picasaweb.google.com/104620544810418955412/
> Backpacking since about 1980 in Japan
> JMT, 2009, 2010, 2011(half), 2012
> Handbook of Hiking will be published in 2013
> ------------------------------------------------------


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