奥运会马上就要召开了,兴奋剂的问题又开始成了敏感话题,看看上月17日旧金山第90届内分泌协会年会上的一篇研究报告,您能从中嗅出点什么。
[center]athletic benefit of growth hormone may be psychological[/center]
new york (reuters health) jun 17 - the placebo effect may contribute to the perceived and
actual performance-enhancing effects of growth hormone in athletes, particularly in men,
according to research presented today at the endocrine society';s 90th annual meeting in
san francisco.
"athletes are doping with growth hormone to improve performance, despite any
firm scientific evidence that it does so," dr. kenneth k. ho of the garvan institute of medical
research, sydney, australia told the conference.
in a double-blind study, dr. ho and colleagues randomly assigned 64 young adult recreational
athletes to receive growth hormone (2 mg/d) or placebo for 8 weeks.
"we found that athletes who believed that they were taking growth hormone
actually felt that their performance had improved and actually demonstrated improvement
in physical performance, even though they were taking a placebo," dr. ho reported.
in general, regardless of whether the athletes guessed correctly or not about
which substance they were taking, everyone showed a small improvement in performance
after the study, usually about 1% to 2%, he said. "this is a well recognized training effect.
but among those who wrongly thought they received growth hormone, the performance
enhancement was about twice that - between 3% to 5%," dr. ho noted.
dr. ho';s team evaluated the "perceived benefit" using a self-rated questionnaire
and "physical performance" from tests of endurance, strength, power and sprint capacity
and "it was only with power that we demonstrated a significant enhancement in those who
wrongly guessed that they were taking growth hormone. this phenomenon was far greater
in men than in women."
"it is clear from our study that the mind plays amazing tricks on the body and this placebo
effect has been known for many centuries. to our knowledge, this is the first study
of the examination of a placebo effect in a sporting arena," dr. ho added.
the study was funded by the world anti-doping agency and the australian
government anti-doping research program.
译文:
运动员从生长激素上获取的利益可能来自心理方面
纽约(路透社健康)6月17日:按照今天在旧金山举行的内分泌协会第90次年会发表的一项研究成果:安慰剂对运动员增加运动成绩的效果可能归因于运动员对自己接受药物的错误认知和生长激素的实际效果两个方面。特别是在男运动员中。
garvan医学研究所的dr. kenneth k. ho说:“尽管任何科学的证据都证明运动员使用生长激素来改善运动成绩是铁定有效的。”
dr. ho和他的同事在为期八周的对64个随机分配的接受生长激素(2mg/d)或安慰剂年轻的成人休闲运动运动员所做的一项双盲研究中发现。
“那些相信自己服用了生长激素的运动员,尽管他们接受的是安慰剂,他们也会确实的感受自己在运动成绩上有所增长,而且实事也证明他们的体能上确有改善。”
一般情况下,不管运动员是否正确的猜出他们服用的物质是什么,在这项研究后每个人的运动成绩都会显示出有1~2%的小提高。dr.ho说:“这种提高幅度被认为是一个较好的训练效果。但在那些误以为自己接受了生长激素的运动员中,这种提高效果是前者的两倍:即在3~5%之间。”
dr.ho的团队用自我评定的问卷调查来评估运动员自己“对服用药物利益的认知”,用耐力、力量、能量和疾跑能力测试来评估运动员的“体能表现”。我们证明:只有在能力方面,那些错误认为自己服用生长激素的运动员有更明显的强化,这种现象在男性运动员要比在女性运动员中表现更为突出。
从我们的研究中可以清楚的发现:意识的作用对人体起到了惊人的欺骗效果,这种安慰剂效果在几个世纪前都已经被人们熟知。就我们所知,该研究是第一个在运动领域关于安慰剂效果方面的研究。
这个研究受到世界抗兴奋剂协会和澳大利亚政府抗兴奋剂研究计划的资助。
如果我们的教练员都能有此认识并加以利用是不是也很妙呀!
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[本贴已被 jiajie 于 2008-7-1 22:08:38 修改过] |