I have been suffering with an under active thyroid now since the birth of my daughter 5 years ago, which went undiognosed for 6 months. I went to my gp as I was suffering depression and very bad muscle fatigue, since being on my meds this has improved and continued to improve when I started running and then cycling.
I use to do moderate amounts of running which use to make me feels great but I have progressed to cycling and the first few months were great but now I am suffering muscle fatigue to the point where it's painful, I'm just wondering if the excuses "that I'm doing to much" or "that I'm tired" may not actually be down to my cycling and that it maybe related to my thyroid as I've given myself decent breaks with no change and if anything it's getting worse.
Is there anyone else with an under active thyroid that has found that their thyroid condition impacts on sports or activities they do? If so do you have any advice on how best to work through it?