[pct-l] boots?

[Tuula]

Yoshihiro 
Great stuff :-)))
What I am particularly interested in to see is how hiking in shoes will impact on my knees and hips. Both tend to normally suffer a lot during longer hikes....

Sent from my iPad

On 14 Jan 2013, at 07:54, Yoshihiro Murakami <completewalker at gmail.com> wrote:

> Dear Tuula
> 
> I was stimulated by this mailing list and searched scientific papers.
> I found many important findings, and I wrote them in my hiking
> handbook ( it will be published in April, sorry it was all written in
> Japanese ).　If you want to try shoes, you need to train calf muscles
> and Achilles' tendon.
> 
> I will cite simplified several conclusions of  itemized section in my book.
> 
> // clear points
> 
> Boots reduce the shock of the Achilles' tendon around 10 %. ---Rowson
> S., McNally C.,& Duma S.M. 2010  Can footwear affect Achilles tendon
> loading? {\it Clinical Journal of Sport Medicine}, 20, 344-349.}
> 
> Boots reduce the burden of the ankle, but increase the burdens of the
> knee joint. ---
> B\"{o}hm, H.,& H\"{o}sl, 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, 2,472} 2467-}
> 
> Thick, soft shoes are the most unstable, and thin, firm shoes are the
> most stable. ---Robbins, S., Waked, E., Gouw, G.J. ,& McClaran, J.
> 1994   Athletic footwear affects balance in men.{\it British Journal
> of Sports Medicine}, 28, 117-122.}
> 
> // not clear, but the answer may be positive
> 
> Do the boots support an ankle?  In this respect, there is no strong
> evidence, but the answer may be positive based on the meta analyzes of
> 14 reliable studies . As Dan Jacobs posted, aircast was proved to have
> supportive function. ----Handoll, H.H., Rowe, B.H., Quinn, K.M., de
> Bie, R.  2001  Interventions for preventing ankle ligament
> injuries(Reviews). { Cochrane Database Systematic Review},
> 2001;(3):CD000018.
> 
> // not clear, it may be no difference
> 
> Which are safe,  boots or  shoes? --- Anderson, L.S. Jr, Rebholz,
> C.M., White, L.F., Mitchell, P., Curcio, E.P. 3rd, Feldman, J.A., \&
> Kahn, J.H. 2009  The impact of footwear and packweight on injury and
> illness among long-distance hikers.
> {\it Wilderness Environtal Medicine}, 20, 250-256.} They studied AT
> and PCT hikers and found no difference.
> 
> no difference, refined prospective randomized study --- Hamonko, M.T.,
> McIntosh, S.E., Schimelpfenig, T., \&  Leemon, D. \ \ 2011 \ \
> Injuries related to hiking with a pack during National Outdoor
> Leadership School courses: a risk factor analysis. {\it Wilderness
> Environmental Medicine}, 22, 2-6.
> 
> Those results are negative to Jardine, R.  2009  {Trail life. Ray
> Jardine's lightweight backpacking}. AZ: AdventureLore Press}
> 
> // not clear, no study
> 
> Does Gortex needed for footwear? ---no study.
> 
> // clear point
> 
> Boots are generally heavier than shoes.
> 
> I had already posted the effect of weight of footwear.
> 
> If you are an average man and  the weight of your footwear is within
> 2kg, you need not to be nervous about the weight.
> 
> If your walking speed exceed 7km/h, the lighter footwear is better.
> 
> 
> -- 
> 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
> ------------------------------------------------------