[quote]wejo wrote:I have never understood the thyroid issue as being evidence of doping. If you get a legitimate TUE for thyroid medication you can use it. It is not doping. Now some want to believe that thyroid medication can give an unfair advantage and should be banned, but if it is allowed and you have a legitimate TUE for it, I don't see how that is doping.
Wejo. It might help if you familiarize yourself with the functions of the thyroid and the hormones secreted by it. Anyone who is manipulating their testosterone and/or EPO production is also changing the secretions of the thyroid hormones.
The thyroid hormones are inextricably linked to the pituitary and hypothalamus, all of which produce hormones necessary to growth, strength and metabolism. As someone else said, once you push one button the other buttons need pushing too.
From the pituitary:
Thyroid Stimulating Hormone (TSH)
Follicle-Stimulating Hormone (FSH)
Luteinizing Hormone (LH) responsible for secreting testosterone (get where they are going yet?)
Growth Hormone (HGH)
ACTH — the adrenocorticotropic hormone (also involved in testosterone production)
From the hypothalamus:
Gonadotropin-releasing hormone (GnRH) (also involved in testosterone production)
Corticotropin-releasing hormone (CRH) acts to release ACTH
Bodybuilders who take steroids or HGH upset the balance of the other hormones in the body. The body senses too much here so it tries to balance things by cutting back on secretions of complimentary hormones elsewhere which will eventually wreck the body. Along comes modern science so that doctors who are monitoring androgenic/anabolic hormones will also manipulate and restore FSH, TSH, CRH etc. to their normal levels.
As has been said before, all of Salazar's athletes are not on thyroid replacement therapy.