High Altitude?

It's interesting to me, that I can get short of breath hauling a large laundry basket up two flights of stairs?  Okay... I run marathons?  What's wrong with me?   I feel like I'm living at high altitude or something?

Today, I decided to do a quick clean on my house.  Something that I do quite often due to the accumulation of dog hair.  Most times find myself vacuuming every couple days.  Ever since I've grown this "belly" I'm finding it more and more difficult to do certain tasks; like the one I mentioned above.  I find myself getting short of breath, and my heart feels like it's going to jump out of my chest?  Really?  I'm only vacuuming, I'm only going up the stairs?  So today, I decided that my form of exercise is going to be cleaning and working my 8 hour shift at the hospital, along with some weight training.  Who knew that "cleaning" could be such strenuous work? 

Happy Cleaning!