2011年10月11日星期二

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So for me to be drinking fifteen cups plus per day was of no real benefit.Exactly
three weeks on since my last cup of coffee and my system is presumably caffeine-free.
That's why I decided to decaf my body - and in doing so discover how
coffee really can be used to make me mentally and physically fitter.I could tell the
difference that caffeine had had on my body and system, before I started drinking coffee
in the quantity that I do now I knew caffeine was in my body. Well,
maybe not. Right now I feel like a junkie - on this, my first day
of withdrawal, I absolutely crave caffeine. In a 2002 study published in the Journal of
Applied Physiology, scientists found that the time it took for cyclists to exercise to exhaustion
was significantly longer in those receiving caffeine than those given a placebo. It does have
a dramatic effect on alertness but as you move to more involved functions suchStill, studies
have long shown that caffeine has sports-enhancing effects. In fact the complete opposite is now
Zapatillas Puma believed to be true, coffee is rich in anti-cancer agents - contributing more antioxidants than
cranberries, apples or tomatoes.Of all caffeine's purported effects, the one most touted is its ability
to provide a temporary mental edge. The main one seems to be improving endurance. Caffeine
just doesn't affect me.If you've developed a tolerance to caffeine you should try withdrawal until
you become caffeine naive again, then come back to it for your sporting event, when
it's likely you'll get a greater response per dose.That's the plan. For over a year
I woke, packed the coffee-maker with Colombia's finest legal export, hit the button and drank
the resulting 10 cups of black stuff over the next hour.By lunch I'd usually follow
up my morning dosage with one or two cans of Coke, nothing too serious. As
a keen cyclist, I'd developed the habit of stopping off for an espresso en route
home.Unfortunately, I've become hardened to it. My head feels like it's been crushed in a
vice - but I struggle on. I have to free myself from my slavery to
Nike Tn the coffee bean. The longer you're awake, the more adenosine gradually accumulates in your brain.
Sounds great to me.Most recent studies have shown that the equivalent of two cups of
coffee was sufficient to provide a longer exercise duration to exhaustion - but any more
had no additional benefit. Then, in 1982, researchers discovered an evolutionary fluke: caffeine's molecular structure
is very similar to that of adenosine, an inhibitory brain substance found in many animals,
including humans.Studies suggest adenosine could be the sleep-inducing chemical, When people need sleep, adenosine levels
are high, which triggers the brain into wanting to shut down. Hence as a training
[http://www.nike-trainers.com] cyclist any advantage I can gain to improve my training is welcomed.It now appears
that caffeine works on motivation within the brain itself. A study recently concluded that caffeine
consumption showed no influence on the rate of heart disease or stroke. Now I know
I've reached a tolerance point. So what is gripping me to the hot mug? Until
about 20 years ago, scientists thought caffeine was a brain stimulator. The growing surfeit, in
turn, binds to adenosine receptors, depressing nervous-system activity and making you groggy.In ways that are
not yet understood, getting enough sleep clears the chemical from your system, allowing you to
begin the next day fully restored, your sleep debt paid in full. It seems to
affect affects your perception of effort and makes you feel you're not working as hard
as you might otherwise feel. But by five, I'd be ready to resume heavy usage
again - this time to boost physical endurance. Crucially, this benefit was greatest in those
who didn't use caffeine regularly. Caffeine, however, blocks adenosine, binding to the receptors before the
adenosine gets there.Surely we caffeine fiends can't keep doing this to ourselves day after day
without having to pay some kind of penalty. The headaches and urge to hibernate that
plagued me during the first five days of abstinence have faded.Harwood E WoodpeckerI try to
pass on my musings on life and experiences in a way that people may find
interesting to read.www.nike-trainers.com [http://www.nike-trainers.com]You may not always agree with my writings but I hope to
inform..
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