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Creatine Creates a Sensation
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Even if you don’t know exactly what it is, chances are
you’ve probably heard about creatine. With help from the
media and high-profile athletes, this popular supplement
exploded onto the scene several years ago as news spread of
its potential as a muscle builder and sports-performance
enhancer. Further proof of its popularity: Sales of creatine
have skyrocketed from $30 million in 1995 to a projected
$180 million in 1998.
Perhaps the greatest testament to creatine’s
effectiveness and, hence, its popularity is the fact that so
many who use it — professional and amateur athletes alike —
actually see results. Fast results. Unlike predecessors such
as chromium picolinate, creatine has, from the outset,
consistently demonstrated its usefulness in a variety of
applications in numerous scientific studies. More than 50
studies examining creatine have been published and another
50 are expected to be published before year’s end.
But neither its popularity nor reports of its
effectiveness have completely erased the doubt and fears of
those who question the safety of creatine supplementation. A
recent survey of the Association of Professional Team
Physicians indicated 85 percent would not recommend creatine
until more research was completed. And, because no study of
creatine has lasted longer than 51 days, it is impossible to
know its long-term effects.
Who’s it for?
Each of us has varying levels of creatine stored in our
muscles depending on our diets, activity levels and
genetics. Those who appear to benefit most from creatine
supplementation are those with the lowest amounts to begin
with. After the initial recommended loading phase of 20 to
25 grams per day for five to seven days, the muscles become
saturated with creatine and additional supplementation
beyond a 3- to 5-gram maintenance dose becomes a wasted —
and expensive — enterprise. In fact, the daily turnover rate
for creatine is only about 2 grams per day, making large
doses not only unnecessary, but potentially harmful since
protocols deviating from the recommended dosages have yet to
be studied.
The sports performance benefits of creatine are limited
to activities requiring short, all-out bursts of power, such
as:
 | jumping |
 | swimming |
 | sprinting |
 | high-intensity weightlifting |
A recent statement by the American College of Sports
Medicine notes that 'creatine supplementation has not been
shown to improve longer-duration aerobic-type exercise.'
The 'More is Better' Syndrome
The controversy that continues to hound creatine stems
from the fact that the controlled setting of a lab does not
always reflect real life. In a
if-a-little-is-good-more-is-better society like ours, it’s
no surprise that many people are taking far more than the
recommended dosage of creatine, which is something the
researchers have yet to examine. And few studies have been
able to demonstrate creatine’s effectiveness beyond the lab
setting — on a baseball field, for example, or at a track
meet.
'Much remains unknown about whether creatine is
absolutely safe for long-term use at levels currently being
recommended,' said the Food and Drug Administration in a
June 1998 statement cautioning consumers about the popular
supplement. The FDA urges both current and potential users
to see their doctors to identify any potential health
problems. Creatine supplementation is not for everyone,
particularly those with a history of kidney problems, or who
are younger than age 18 or are still developing. Nor should
one expect the supplement to be effective without a
well-designed training program. Every person should examine
their own motives for taking creatine and weigh it against
the potential unknown risks of long-term usage. But be sure
to take the FDA’s advice and check with your physician and
don’t exceed the recommended dose.
How it Works
Here’s how researchers believe creatine works: In its
phosphorylated form, creatine plays a key role in the
formation of ATP, the body’s energy source. Without enough
creatine, which is created in the liver and kidneys and
stored in the muscle, the cycle that creates this energy is
unable to produce enough ATP to meet the demands of short
bursts of muscle activity. Researchers have discovered that
a shortage of creatine can cause muscle fatigue. Because it
is a nonanabolic substance naturally found in the body,
researchers believe creatine to be a safer alternative to
other muscle-enhancing drugs or potions. |
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This ACE Fit Fact is taken from ACE FitnessMatters®
magazine. Want more information like this delivered directly to your
home? ACE FitnessMatters, the bi-monthly magazine from the American
Council on Exercise (ACE), is the source for the most accurate,
up-to-date fitness information you need to live a healthy, active
life. Subscribe to ACE FitnessMatters Magazine directly from ACE at
http://www.acefitness.org/fitnessmatters/ or call
1-800-825-3636.
The American Council on Exercise® of San Diego,
California (ACE®) does not endorse or promote the companies,
products or services that reside on this Web site. ACE does not
receive revenue generated from any organizations that advertise on
this Web site. Copyright 2003 American Council on Exercise. All
Rights Reserved.

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