Hi I've been hypothyroid for 12 years
In the last 7 years I've started doing 100m sprinting again and not noticed any breathing problems, just get my breath back when I stop but had to stop about 9 months ago due to high cortisol.
I thought I should be able to do couch to 5k but I'm just managing to do the 90 second jog (lightly jogging) then my upper chest really hurts, it's like I can't regulate my breath to last the time.
Any tips would be appreciated to try and get through this
Thanks