Running is...

I got up at 4:30 Friday to get in a good morning run.  There aren't many people out that early, I've noticed, just runners, bikers, dog-walkers, and drunk people driving home from the casinos who haven't gone to bed yet. 

It was an enjoyable 7-mile run.  It was the first time I'd run that far since June, although I'd done several longer, more intense workouts in the intervening months.

That's why I couldn't figure out why I felt so horrible all day.  If seven miles does this to me, then what are 26.2 of them going to do.  Later that night I threw up.  Two of my five children threw up.  The three children staying with us because their parents are enjoying a cruise while we clean up their kids' puke threw up.

Turns out that running is...contagious.