27 Dec '14, 1pm

Effects of Running Speed on Foot Strike Patterns and Identification of Multiple Heel Strike Types

Interesting study, but alas falls short on the footwear side. It would have been great to test the same subjects with a set of different shoes with different heel drops, rather than just one with big heel drop. My guess is that we’d see a migration of the numbers of runners in each of the classifications. Shoe stiffness would also be a factor. Peter, your observations about shoe preference, soft heel/firm forefoot, and exaggerating heel strike, suggests to me an issue of force vs pressure. The force, at any instant, being applied by the body through the shoe to the ground is equal to the instantaneous pressure x contact area. If we apply the force over a small area of the heel via an exaggeration dorsaflexion of the ankle we may be reducing the area of contact and as the pressure sole can push back with is governed by how much it’s compressed it’ll have a similar pressure ...

Full article: http://runblogger.com/2014/02/effects-of-running-speed-on...

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Study: Do lighter shafts increase clubhead speed?

Study: Do lighter shafts increase clubhead speed?

golfwrx.com 27 Dec '14, 7pm

Lighter is faster. It holds true in car racing, running, and well… just about everything. Same for golf shafts too, right?...