I was underweight and borderline anemic through early 20's and it didn't make a difference, but still huffed and puffed. I could do low intensity things like cycling for 10 hours a day, no problem, but jogging, swimming, or running would make my descending aorta vibrate my lower abdomen and maintain a typical hr around 120-140 bpm (resting bp was 100/50, now resting hr is 115 with bp 125/80). Trying to discontinue propranolol for endogenous? tachycardia with hypertension.

I'm in the process of losing 40 lbs (17%, cut) and then rebuilding muscle mass.