Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Growth hormone is a poor doping agent for athletes

19.09.2007
Anyone who injects growth hormone with the intention of gaining muscle mass and improving performance should think again. The hormone improves neither muscle mass nor physical performance. This is shown in a new dissertation from the Sahlgrenska Academy at Göteborg University in Sweden.

Doping in sport using growth hormone has become more frequent since the middle of the 1980s. The substance does not cause the same aggressive behaviour as anabolic steroids cause, but it can cause problems that include damage to the heart and blood vessels.

"Many of those who abuse anabolic steroids regard growth hormone as the Rolls Royce of doping agents: it is significantly more expensive to use than anabolic steroids. There is, however, no scientific evidence that it increases performance when used alone as a doping agent", says Dr. Christer Ehrnborg.

Christer Ehrnborg has studied 30 well-trained people living in Göteborg. Twenty of these injected large doses of growth hormone each day for a month, while the other 10 believed that they also were receiving growth hormone but received injections of harmless saline solution instead. Tests of the participants' physical performance on an exercise cycle showed that the participants receiving growth hormone did not perform better than those receiving saline solution.

... more about:
»Christer »Ehrnborg »inject

"It has been a matter of controversy whether growth hormone actually causes an effect or whether it is a matter involving mass psychology. Both our study and studies carried out by others suggest that taking growth hormone will not make you a better athlete", says Christer Ehrnborg.

Measurement of the body compositions of the participants showed that injecting growth hormone reduced the fraction of body fat and increased the amount of water in the body.

"Athletes who inject growth hormone immediately notice an effect in the body, and they assume that the change must improve their performance. We cannot see, however, any effect of increased muscle mass from the hormone in our experiments", says Christer Ehrnborg.

Doping with growth hormone is difficult to prove, since natural levels can vary widely from one person to another, and from one occasion to another in the same person. Christer Ehrnborg presents results in a second article in which elite athletes were studied for a full year in order to determine which factors affect the natural variation in growth hormone levels.

"We found several interesting biomarkers that can be used when analysing blood samples. A new doping test is in the process of being launched, based partially on our research results. The method must first be validated to show that it can be used in judicial proceedings", says Christer Ehrnborg.

For more information, contact:
Dr. Christer Ehrnborg, telephone: +46 31 741 1722, mobile: +46 70 649 6573, e-mail: christer.ehrnborg@gu.se
Supervisor:
Associate professor Thord Rosén, telephone: +46 31 342 7055, mobile: +46 70 266 4642, e-mail: thord.rosen@medic.gu.se
Thesis presented for the degree Medicine doktor at the Sahlgrenska Academy, Institute of Medicine, Department of Internal Medicine

Thesis title: Growth Hormone in Athletes

The thesis is defended.

Elin Lindström Claessen
Press secretary, The Sahlgrenska Academy at Göteborg University
Telephone: +46 31 786 3837, mobile: +46 70 829 4303
e-mail: elin.lindstrom@sahlgrenska.gu.se

Elin Lindström Claessen | idw
Further information:
http://www.vr.se

Further reports about: Christer Ehrnborg inject

More articles from Life Sciences:

nachricht Cancer diagnosis: no more needles?
25.05.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Less is more? Gene switch for healthy aging found
25.05.2018 | Leibniz-Institut für Alternsforschung - Fritz-Lipmann-Institut e.V. (FLI)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>