Exercise physiologists have studied caffeine’s effects in nearly every iteration: Does it help sprinters? Marathon runners? Cyclists? Rowers? Swimmers? Athletes whose sports involve stopping and starting like tennis players? The answers are yes and yes and yes and yes.
So even as sports stars from baseball players to cyclists to sprinters are pilloried for using performance enhancing drugs, one of the best studied performance enhancers is fine for them or anyone else to use. And it is right there in a cup of coffee or a can of soda.
...caffeine increases the power output of muscles by releasing calcium that is stored in muscle. The effect can enable athletes to keep going longer or to go faster in the same length of time. Caffeine also affects the brain’s sensation of exhaustion, that feeling that it’s time to stop, you can’t go on any more.
Read more: http://www.nytimes.com/2009/03/26/health/nutrition/26best.html?pagewanted=1&th&emc=th
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