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Originally Posted by Carno
And do you know exactly what caused these joint replacements? Was it the joint just wearing out from too much running, or was there some other kind of injury involved?
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one thing that can cause joint injury is improper running form... which can be encouraged by the running shoes.
proper running form you land ball-heal-ball and the arch of your foot is used to absorb the impact.
running shoes with a lot of padding in the heal allow you to land heal-toe comfortably which puts a lot more impact on the ankle and knee joints. Try running barefoot on smooth cement, it should be comfortable if you have proper toe-heal-toe form
read Running fast and Injury free by Gordon Pirie Chapter 3 is the main one that talks about footwear and running form
heres a pdf link... it is available for free
http://www.geocities.com/Colosseum/P...ook_040104.pdf
and heres the website about him
http://www.gordonpirie.com/
hmmm... maybe I should make a running form thread here... prolly warrants a discussion of its own...