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the writer did that on purpose.Comment
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Nah, they let Floyd cheated..Comment
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USADA is probably lying, Floyd & Golden Boy paid them off......
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New study...fascinating stuff:
Study shows growth hormone boosts sprint speed
The hard-to-detect substance improves performance in men and women, experts say.
May 03, 2010|By Shari Roan
Injections of human growth hormone can improve sprint capacity enough to turn the last-place finisher in the Olympic 100-meter dash into a gold-medal winner, according to a study released Monday.
Sprint capacity improved for both men and women, the study said. Combining growth hormone with testosterone injections in men doubled the improvement in sprinting.
"This is helpful in showing those skeptics out there who say it doesn't help performance that they're wrong," said David Howman, director general of the Montreal-based World Anti-Doping Agency, which funded the study.
Howman and other sports medicine experts said the finding should serve as a warning to those U.S. professional sports organizations that have resisted testing for growth hormone — which is banned by athletic organizations — because they say the substance is too difficult to detect.
Although the hormone can't be detected in urine, it can be found in a blood sample if the test is performed within a few days of use, Howman said. Professional sports leagues should consider unannounced, out-of-competition testing, he said.
"They should wake up and see they should be putting a lot more effort into detection of this substance," he said.
The eight-week study, one of the most rigorous examinations of growth hormone and athletic performance to date, involved 96 healthy, recreationally trained athletes with an average age of 27. The 63 male participants were assigned to receive one of four regimens: two milligrams per day of growth hormone; 250 milligrams per week of testosterone; both growth hormone and testosterone; or placebo injections. The 33 female participants received either growth hormone or placebo injections.
The athletes underwent physical examinations, laboratory tests and performance evaluations. Neither the researchers nor athletes knew who was receiving the hormone and who was receiving the placebo.
After eight weeks, researchers found that growth hormone improved sprint capacity in men and women by an average of 3.9% over the placebo group — which would trim 0.4 of a second from a 10-second time in the 100-meter dash, said study lead author Dr. Kenneth Ho at St. Vincent's Hospital in Sydney, Australia. In the 2008 Olympics, the top three male finishers had times of 9.69, 9.89 and 9.91 seconds.
That same 3.9% improvement could cut 1.2 seconds from a 30-second time in a 50-meter swim, Ho said.Comment
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