I'm so down about exercising as I started running, just after starting thyroxine. Been on it now for 2 months, still have symptoms and coming up to the end of 4 weeks on an increased dose of 75mcg.
The problem I've got is that my heart rate is really high. The thyroxine has helped bring my resting HR down to 65bpm but that is only ever when I'm asleep. If I'm sitting down resting, it's always more like 90bpm. If I get up and walk it shoots up to 120-130bpm. Just walking around the house!! When I'm running it's at 190bpm which is max heart rate for my age. I also get chest pains. I have mentioned all this to my GP but she kind of ignores it and doesn't offer any answers.
I just want to go running but I'm scared I'll have a heart attack!!
I thought with hypo thyroid your HR would be slower? I don't know what my blood pressure is but whenever it's been measured in the past it's been low.
Is this a separate issue to thyroid or connected? Should I just run and hope as I get fitter it will go?