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What the performance benefit of track spikes for distance events in track and field,[url=http://billigamonclerjackasverige.albirank.net/][b]http://billigamonclerjackasverige.albirank.net/[/b][/url]
Not sure where you've been watching track,[url=http://duveticaukoutlet.halod.com/][b]Duvetica Down Jackets For Men[/b][/url], but when I was in high school,[url=http://duveticamen.blogspot.com/][b]http://duveticamen.blogspot.com/[/b][/url], nearly everyone wore track spikes (and xc spikes for cross country). The advantage isn't just in the traction,[url=http://giuseppezanottioutlets.webmium.com/][b]Giuseppe Zanotti Sneakers outlet sale[/b][/url], it's as much in the weight. I haven't found any serious studies on it,[url=http://parajumpersonline.webmium.com/][b]Kodiak Jackets Online PARAJUMPERS[/b][/url], but the rule of thumb seems to be about 1-2 seconds/mile for each ounce of shoe - 10-15+ seconds/mile,[url=http://duveticaukoutlet.halod.com/][b]Duvetica Jackets UK Outlet[/b][/url], 30-45+ seconds off a 5k. Now,[url=http://duveticamen.blogspot.com/][b]duvetica men[/b][/url], is there absolute proof for this? As I said,[url=http://merrellfootwearsizechart.webmium.com/][b]http://merrellfootwearsizechart.webmium.com/[/b][/url], not that I can find,[url=http://giuseppezanottioutlets.webmium.com/][b]2013 Giuseppe Zanotti shoes outlet sale[/b][/url], but take a 5-ounce shoe in one hand and a 15-ounce shoe in the other and lift them both up and down a few thousand times and tell me which hand gets tired first.
Imagine you tried to run on ice with your running shoes. You're not going to have any traction and you're not going to get very far. Actually you'll probably slip. If you were to use track spikes,[url=http://rogervivieroutlets.webmium.com/][b]http://rogervivieroutlets.webmium.com/[/b][/url], the spikes would dig into the ice and you would gain significantly more traction.
It is the same principal when running on the track surface,[url=http://duveticaoutlet.albirank.net/][b]duvetica duvetica jackets outlet duvetica sport jacket duvetica mens clothing sale[/b][/url]. The spikes catch the surface and give you more traction,[url=http://giuseppezanottioutlets.webmium.com/][b]Giuseppe Zanotti shoes outlet sale[/b][/url]. Thus there is less "slipping" of your shoes on the track surface,[url=http://parajumpersonline.webmium.com/][b]http://parajumpersonline.webmium.com/[/b][/url].
All in all,[url=http://discountmerrellshoes.webmium.com/][b]http://discountmerrellshoes.webmium.com/[/b][/url], it is basically used for performance optimization. I'm not sure if there are any studies done on whether or not they actually increase performance,[url=http://woolrichdeutschland.gengfl.com/][b]http://woolrichdeutschland.gengfl.com/[/b][/url], but I personally would suspect they do.相关的主题文章：

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