On Mar 29, 2009, at 1:07 PM, Kevin Callahan wrote:
On Mar 29, 2009, at 10:05 AM, Ryan Waldon wrote:
Yes, as a competitive cyclist I'm quite familiar with caffeine and
it's benefits. It's not all free lunch though, caffeine has to be
used carefully in warm weather as it can contribute to severe
dehydration. Dehydration can more than offset any gains the
caffeine net you. Also, because caffeine does work, the IOC and
WADA limit competition urine testing levels to 12 mcg/mL. Exceed
the limit and you're nicked...
interesting ...
I drink a couple of cups before my long runs ... but I also drink a
lot of water if I'm running more than an hour
regarding dehydration:
I asked Dr. Tarnopolsky. It turns out, he said, that you get
habituated to two of caffeine’s effects right away. Caffeine can
make you urinate, but only if you are not used to it.
“Athletes do not get dehydrated from caffeine,” he added, “contrary
to popular myth.”
And caffeine does increase the heart rate and blood pressure in
people who are not regular uses. “But after three or four days, that
potentially negative effect is gone,” Dr. Tarnopolsky said.
Pretty neat. Have they studied the mental effects too? I know I am
much more focused right after a cup of tea or coffee.
--Larry
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