Allright guys. All you physiology masters pay attention. I need an explanation of what happened to me when I was in my early 20s.
DISCLAIMER: To the moderators, please don't can this thread. I am not seeking medical advice as this was a one-time occurence and I got a checkup soon after. All checked out OK. I AM NOT SEEKING MEDICAL ADVICE, just a physiological explanation.
Early 20s, better than average shape and build, but certainly not marathon runner shape (I guess as you will soon see). There is a place in Georgia called Kennesaw Mountain. It has a hiking trail up the mountain and then a paved road that circles the mountain all the way up, about 2 miles in distance. It is quite a steep road. I put on a very quality heart monitor and basically ran down the paved road as fast as I could. For 2 miles. Suprisingly it was not that hard, just put you feet in front of you. During this, I passed a car traveling down the road. No lie.
My HR peaked at 209 BPM which violates the 220 - your age formula.
Sustained HR in 180-195 range the trip down.
Afterwards for 3 days, anytime I took a more than normal, resting tidal volume breath an inspiratory wheeze developed and I had an irrestible urge to cough. Needless to say, this was worse than my nagging GF ever was.
I would assume I gave my self a stress test at that time. Never did I feel any CP or discomfort. I probably created a very large consumption / supply deficit because I was not breathing that hard (running down a hill ain't rocket science, just go with gravity) with such a high HR. But like I said, never any CP or discomfort.
