Yes, I am an athlete, and yes, I am used to making sacrifices. I am willing to undergo what normal people would consider extreme pain in the pursuit of faster speed. I even enjoy pushing my body well beyond the point of uncomfortable.
And I tell myself that it's not that bad. Once I get going, it will feel great. That I just have to go for a couple miles, and then I'm done for the day.
But you know what? 13 F is just too cold for a tempo run.