I was diagnossed with hypothyroidism about 6 years ago. I just recently started running earlier this year (I have completed one 5k and my second one is coming up on the 16th)
Recently I realized that I have been feeling super sluggish so I had my endo check my thyroid and it turned out my tsh was a little on the highside so he raised my dosage.
My husband seems to think my levels have changed because of the running. Has anyone had issues with this? In a good week I go to the gym 3 mornings and run atleast 2 evenings (only about 2-3 miles)
I have not had the amount I run affect my thyroid levels. I believe what seems to affect my thyroid the most is female hormone fluctuations.
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I do think it's possible - and I believe I've had problems with this as well. I think of it as supply and demand. Metabolism is driven by thyroid hormone - if you increase your body's demand (running) and your thyroid gland can't compensate, you "could" end up more hypo. It's a weird thing - I think there is individual variation as to which body system is more sensitive to decreased amount of hormone. For me, it's always my GI tract - the first thing I notice when my levels drop, is a loss of appetite, the effect on my exercise/running is a late symptom For someone else, it could be something different.
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