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Thyroid UK
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Advice please

Hi peops. Ive an ongoing issue with what seemed to me under active thyroid. The main problem seems to stem from exercise or exertion were i started to feel headachy, exhausted and a little breathless a while after exercise and then for a few days following it and then a few days later i start to feel normal ish again. Someone on here replied to me that it seemed my t3 was dropping from the exercise which seems logical. Ive had the usual thyroid tests done wih my gp and all normal so i went to an endo and again all results look ok apart from the fact i have both left and right lobe nodules 1 of which is 3cm x 2cm so i am gettig a fine needle biopsy to look into it further. Apparently though the nodules shouldnt cause the symptoms of tiredness, headaches etc as my thyroid hormone results look normal.

What i need to know is when i got my endo bloods taken 2 weeks ago i hadn't exercised in months and feel not too bad. I went for a cycle just on monday just past amd lastnight the headaches started again and again today with that weird weak shaky feeling i get. Is it likely that my t3 was ok when i got my bloods done the other week because i hadn't been exerting myself but now I've exercised they have dropped again. If i was to get the bloods done when i feel like this would the results be different. Should i go out and purposely exert myself and get the bloods done then.

Ps. I haven't got my results yet to post on here but will ask for a copy when i get my biopsy done.

2 Replies


Exercising depletes T3 which is why your recovery from exercise is taking a few days until your T3 level improves. I suspect your T3 level may be suboptimal and that's why this is happening. When you get your results post them in a new question for advice.


Thank you clutter. Its def exercise related even minimal exercise and vit b d iron ferritin etc were good levels.

Ill get the results tomorrow and post again.

Your advice is much appreciated 😍


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