Quote Originally Posted by indysteel View Post
My resting heartrate varies, but has been tending to run in the low 50s. Over the summer when my thyroid was whack, it was in the 65-75 range and could get to 110 if I was just sitting at my desk. That sucked.
Same here. I've got Hashimotos and taking my resting HR every morning actually got me onto it. I'd probably still be clueless about the Hashimotos if I hadn't noticed the rapid changes and spikes in resting HR.

It can be in the 60-65bpm region when my thyroid plays up. My endocrinologist restricted me to 120bpm and I wasn't allowed to bring my HR up any higher during my rides, which was a challenge because just thinking about riding usually gets me excited!

It's all back to normal now and this morning it was 52bpm, which is low.