...you've ever walked around with your hands in your pockets just so you could feel your quads flex with each stride.
...you always run on the dirt/gravel/grass right next to the paved bike path.
...you understand that the wind can in fact be in your face for the entire 400 meters of the track.
...you've ever intentionally run through the sketchy part of town to ensure you get a good workout.
...you learn the most about your teammates during practices where not one word is spoken.
...you've ever gotten pissed about a bloody nose because you're losing valuable red blood cells.