Caffeine is absorbed by the stomach and small intestine within 45 minutes of ingestion. It takes less than an hour for caffeine to begin affecting the body and a mild dose wears off in three to four hours. Consumption of caffeine does not eliminate the need for sleep: it only temporarily reduces the sensation of being tired.
It increases the capacity for mental or physical labor. A study conducted in 1979 showed a 7% increase in distance cycled over a period of two hours in subjects who consumed caffeine compared to control subjects. Other studies attained much more dramatic results; one particular study of trained runners showed a 44% increase in "race-pace" endurance, as well as a 51% increase in cycling endurance, after a dosage of 9 milligrams of caffeine per kilogram of body weight.
A runner, Weldon Johnson, used caffein as a performance enhancer in 1998. He was not a coffee drinker but had heard that caffeine could make him run faster. So he went to a convenience store before a race and drank a cup of coffee. For the first time in his life, he ran 10 kilometers in less than 30 minutes.
Now he used to drink coffee one hour before the race as a part of his routine. And It turns out that Caffeine is legal, one of the few performance enhancers that is not banned by the World Anti-Doping Agency.
While relatively safe for humans, caffeine is considerably more toxic to some other animals such as dogs, horses and parrots due to a much poorer ability to metabolize this compound. Caffeine has a much more significant effect on spiders, for example, than most other drugs do.
So, still need a good reason to drink coffee ?? This is one for sure.
Enjoy your cup of Coffee...
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2 comments:
gatorade has alot of caffine in it as well.
yep..so does Coke...enough shot to keep myself awake on studying for my final test...:)
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