19 oct. 2019

Triathlon and TUEs

Our previous post deals specifically with asthma.  Please read previous post.  Let’s see what hypothyroidism treatment can do for us.  Remember, Galen Rupp has been treated for asthma and hypothyroidism:

Last week, the Wall Street Journal profiled Jeffrey Brown, an endocrinologist to star athletes and a medical consultant for Nike. His roster of patients includes nine-time Olympic gold medalist Carl Lewis, and athletes treated by Brown have won 15 Olympic gold medals combined, according to the doctor.

We can believe that confined variables exist to the fact that gold medalists taking thyroid hormone won gold; they are more focus, they take care of details, etc.  but we still have other problems.
Thyroid hormone is known to affect sex hormone-binding hormonal globulin (SHBG) concentrations. Men with hyperthyroidism have elevated concentrations of testosterone and SHBG. Thyroid hormone therapy in normal men may also duplicate this elevation. 

This knowledge about thyroid hormone elevating the concentration of testosterone is well known by endocrinologists, even Floyd Landis knew about it:
In 2006, bicycle racer Floyd Landis blamed his hypothyroid medication for the illegally high testosterone levels detected in urine samples taken during his Tour de France ride, according to the New York Times. An overactive thyroid gland does seem to coincide with higher levels of testosterone, so it seems feasible that an increase in thyroid hormones from medication could cause a similar reaction. Race officials, however, were not swayed, and Landis was stripped of the yellow jersey that summer.

We have a history of using performance enhancing methods for years, at one point valid methods; Lasse Viren injecting his own blood for example. Emma Snowsill running with a Ventolin puffer.  If we want a clean sport, TUEs should be transparent.  Who has one and how he/she is monitored by WADA should be available to the public. 


Below, a few things related to Salbutamol.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2658979/
Our results add to the growing body of evidence that salbutamol mediates anabolic effects, and we report a mechanism by which salbutamol might promote such effects. Salbutamol has a short plasma half‐life (3–6 h). Following a recommended dose of inhaled salbutamol, the compound is only transiently detectable in the plasma, and salbutamol reaches levels up to 2.5 ng/ml or 1.04×10−8 M. These levels are considerably lower than effective concentrations in our in vitro experiments, which were above 10−6 M with an (IC50 value of 8.93×10−6 M). Whereas anabolic properties have been demonstrated in several species after systemic use of some beta‐2 agonists,,, salbutamol possess anabolic activity only after intravenous administration, and no potent anabolic effects have been reported after oral administration in animals., In addition, in humans, oral administration of therapeutic levels of salbutamol increases maximal anaerobic power,,, irrespective of the subjects' training status, without changing the body composition., Similar improvements in performance have been shown in two other studies, using a comparable daily salbutamol dose., Of note, there is no evidence that inhaled beta‐2 agonists have ergogenic effects at therapeutic doses. Although it is too early to draw final conclusions, based on these studies we hypothesise that the agonistic activity we observed at the androgen receptor might play also a role after intravenous administration of salbutamol.

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