Bummer!

Today I had my 6 month follow up with my lung doctor. I told him about some trouble that I have been having lately. I am exercising a LOT but I don't seem to be developing any endurance. I swim, bike, and run often but any time that things get strenuous I get terribly winded. I get to the point that I feel like something is trying to claw it's way out of my chest. When I run I get so winded after a half mile that I have to slow down to a quick walk, then recover pretty quickly, then run some more. I do this a lot but the distance or endurance level never seems to increase. My doctor confirmed that my lungs are working great. He feels that I may possibly have some coronary blockage so he's ordered a nuclear stress test for Monday morning. This all seems just a bit odd considering that I have done the following this past week:

Sunday - 19 mile bike ride
Tuesday - 5.8 mile run (actually fartleks, (look it up!))
Wednesday - 1/2 mile swim
Thursday - 5.5 mile bike ride
Friday - 5.8 mile run (more fartleks)

All day today I have been totally drained of energy. Maybe we can get to the bottom of this so that I can finally get straightened out.
I still plan to participate in the Triathlon on August 10. My doctor said that he will tell me if I have his blessing for this by Wednesday. He did ask me to scratch the practice run that is schedule for this Sunday.