[pct-l] to prevent injury

[Yoshihiro Murakami]

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
------------------------------------------------------