Today I feel like a pile of goo. Yes, you read that correctly: goo. After an “off again” stretch of my on-again-off-again training method for the upcoming half-marathon, I managed to run 8.91 miles today.  It was a really hard run.  It was hot, it was long, I’m not as conditioned as I would like to be, and I’m 36-years-old.  All of this...