Featured Research

from universities, journals, and other organizations

Athletic Benefit Of Growth Hormone Doping: Is It All In The Athlete's Mind?

Date:
June 18, 2008
Source:
The Endocrine Society
Summary:
If athletes believe they are using a performing-enhancing drug, they may think their athletic performance improves, and in some men it can, even if they are actually taking a dummy drug, a new study has found.

If athletes believe they are using a performing-enhancing drug, they may think their athletic performance improves, and in some men it can, even if they are actually taking a dummy drug, a new study has found.

This so-called placebo effect was greater in male recreational athletes than in females, said lead author Jennifer Hansen, RN, a nurse researcher at the Garvan Institute of Medical Research in Sydney, Australia. In a study of growth hormone, the authors tested whether the power of the mind affects physical performance.

"Athletes are doping with growth hormone to improve sporting performance despite any evidence it actually improves performance," Hansen said. "Therefore, we wanted to know if any improvement in performance is due just to the athletes' belief that they are taking an agent that enhances performance, rather than to the agent itself."

Sixty-four young adult recreational athletes randomly received either growth hormone--a substance banned in sports--or an inactive substance (placebo) for 8 weeks. Neither the athletes who volunteered for the study nor the investigators knew which substance the athletes received. At the end of the study, the researchers asked the athletes to guess which agent they had taken and to say if they thought their sporting performance had changed. Then they tested the athletes on physical performance tests of endurance, strength, power, and sprint capacity.

Men were much more likely than women to think they had received growth hormone. Regardless of sex, athletes who took the dummy drug but believed they were on growth hormone ("incorrect guessers") thought their performance improved and actually had some improvement in all measures of performance. However, jump height (power) was the only test that showed a significantly greater improvement among the incorrect guessers, according to Hansen.

"The results of this study suggest that the placebo effect may be responsible, at least in part, for the perceived athletic benefit of doping with growth hormone for some people," Hansen said.

Detailed results of the study will be presented at The Endocrine Society's 90th Annual Meeting in San Francisco.

The study was funded by the World Anti-Doping Agency and the Australian Government Anti-Doping Research Program. Novo Nordisk supplied the growth hormone for this study.


Story Source:

The above story is based on materials provided by The Endocrine Society. Note: Materials may be edited for content and length.


Cite This Page:

The Endocrine Society. "Athletic Benefit Of Growth Hormone Doping: Is It All In The Athlete's Mind?." ScienceDaily. ScienceDaily, 18 June 2008. <www.sciencedaily.com/releases/2008/06/080617113743.htm>.
The Endocrine Society. (2008, June 18). Athletic Benefit Of Growth Hormone Doping: Is It All In The Athlete's Mind?. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2008/06/080617113743.htm
The Endocrine Society. "Athletic Benefit Of Growth Hormone Doping: Is It All In The Athlete's Mind?." ScienceDaily. www.sciencedaily.com/releases/2008/06/080617113743.htm (accessed April 23, 2014).

Share This



More Health & Medicine News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Big Pharma Braces for M&A Wave

Big Pharma Braces for M&A Wave

Reuters - Business Video Online (Apr. 22, 2014) Big pharma on the move as Novartis boss, Joe Jimenez, tells Reuters about plans to transform his company via an asset exchange with GSK, and Astra Zeneca shares surge on speculation that Pfizer is looking for a takeover. Joanna Partridge reports. Video provided by Reuters
Powered by NewsLook.com
Study Says Most Crime Not Linked To Mental Illness

Study Says Most Crime Not Linked To Mental Illness

Newsy (Apr. 22, 2014) A new study finds most crimes committed by people with mental illness are not caused by symptoms of their illness or disorder. Video provided by Newsy
Powered by NewsLook.com
Hagel Gets Preview of New High-Tech Projects

Hagel Gets Preview of New High-Tech Projects

AP (Apr. 22, 2014) Defense Secretary Chuck Hagel is given hands-on demonstrations Tuesday of some of the newest research from DARPA _ the military's Defense Advanced Research Projects Agency program. (April 22) Video provided by AP
Powered by NewsLook.com
How Smaller Plates And Cutlery Could Make You Feel Fuller

How Smaller Plates And Cutlery Could Make You Feel Fuller

Newsy (Apr. 22, 2014) NBC's "Today" conducted an experiment to see if changing the size of plates and utensils affects the amount individuals eat. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins