Helen, congratulations on your new 10k
pr. It sounds like a tough course! With an easier course, you're bound to get a new
pr the next time you race.
eadavenp, good job on getting out there. You'll be ready for your 5k, just keep working toward the goal.
Sheila, my only thought is that you're maybe running faster/working harder than you're used to on the treadmill. But that doesn't really explain the wheezing and coughing afterwards.
I ran an easy 10k this sunny, breezy morning. I came home and immediately went back out with my 7 year old for 2.7k walk/jog. He found the wind quite challenging.