noname wrote:
Without solid research, it's a stretch to say that hypothyroidism is caused by high intensity training. It's possible that has been in your family but it was undetected.
If endurance sports CAUSE hypothyroidism, then every runner would get diagnosed at one point. but we all know runners who do some crazy mileage and intensity and are completely normal.
It would be a great to have more research on this.
This makes sense to me and I really wish there was more research on the subject. When I was diagnosed, and indicated that the symptoms initially started during a bout of overdoing my training, the doctor suggested that perhaps the stress of over doing it, may have brought the condition out.
I have the autoimmune condition (Hashimoto's), and after being diagnosed I found out my grandmother, her sister and my only female cousin on that side of the family had the same condition. My grandmother and her sister both became symptomatic after bouts of strep throat, my cousin was hit during her pregnancy, and me following the peak of a marathon training cycle, so all stressful events. Therefore, it would make sense that stress brought out the condition.
I would be interested to know if the elite endurance athletes being treated have the autoimmune condition or not? It has been my understanding that for me, the attack launched by my own immune system destroys the gland and therefore, normal function will never return. With that said, when I have felt slightly symptomatic I have backed off of exercising and sometimes will feel physically better following a few weeks of rest.
It would make sense that a gland that is simply fatigued versus had it's cells attacked by an immune response, could recover without medication. For me, someone who has a legit thyroid condition, being medicated does not help my performance and has not even brought me back to normal. However, it would be interesting to see some more research on the impact to someone who does not really need synthetic thyroid hormone replacement.