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I just wonder if there is anyone else out there who had been diagnosed with an underactive thyroid and taken thyroxine, who also runs marathons?
I recently trained for and ran my third marathon four weeks ago. I have had problems with my thyroid in the past but it was sub-clinically overactive and the symptoms were mainly eye problems. I noticed while training for this marathon that I was getting silly tired after long runs, complete brain fogs that took days to clear, and training and running were just so much more effort than for the last marathon I ran (last September), and I put on huge amounts of weight despite 50-60 miles/week (trust me, I haven't eaten all the pies......). Sure enough a blood test revealed an underactive thyroid and 3 weeks ago I was started on 50 mg thyroxine.
My question, has anyone else been in this situation, how long does it take for things to even out and is it possible to train and run marathons (and still get PBs)? I haven't had any improvement in the tiredness yet, but then it's still only four weeks since the marathon. But the weight is shifting, finally.....