I'm probably just being a hypochondriac....
When I finished the GNR I was wheezing and finding it really quite hard to breathe. Within a couple of minutes I was OK again. I had a similar experience at the end of my first 10k. My lungs feel tight and I can't seem to get them full of air. Does this sound like exercise induced asthma? Should I go to the doctor about it? I never have these symptoms at any time other than just after an exceptional (for me)physical effort.