Excessive exercise can inhibit the conversion an use of T3. Cortisol rises with exercise, and so does inflammation, both interfere with T3. It can also raise RT3 which further limits the use of your T3.
There are mixed findings in the studies when it comes to moderate exercise, but most show a return to normal levels shortly after you are finished exercising. There are some article and studies on Google Scholar if you want to dig deeper.
Träning och hashimoto….