T3/T4 and Endurance Athletes  


Eminent Member
Joined: 6 months ago
Posts: 22
20/12/2019 7:27 am  

I was just wondering if there was a reason that a lot (or seems like a lot) of endurance athletes us thyroid hormone. Adam Goucher, Galen Rupp, Floyd Landis, and a couple of other big names have stated publicly that they are on thyroid medications. I was wondering if endurance athletes have an increased likelyhood of hypothyroidism due to overtraining or if there is some sort of health/performance benefit (it was also written into Tyler Hamilton's Fuentes protocol). I know that t3/T4 use could really mess up your thyroid when not needed, but I'm just wondering if there is a relatioship.

I think a couple of people on this board (Realgains) have been diagnosed and am wondering if they could shed some light on this. I tried to do a literature search on the topic, but didn't find anything.

going long
New Member
Joined: 5 months ago
Posts: 3
20/12/2019 7:56 am  

I tried T3 to loose some extra weight but I found that I didn't recover as well when taking it. I could just be me.

Member Moderator
Joined: 2 years ago
Posts: 1200
20/12/2019 8:19 am  

check out the article by nandi that i recently posted over in the anabolic section.

chronic exercise impacts T3 uptake however if you supplemented with too much T3/t4 you would be in danger of an increasing catabolic state.