Am I the only one who counts breaths in order to get through the 400m and 800m sprints? I've got it down to a science - 1 breath in and out = 4 paces, and 15 breaths take me 0.05 miles, so a 400m is just 5 rounds of 15 breaths.
Also, anyone else bite their lips? I'm the worst when I do push-ups, and I caught myself doing it during OH squats today. Lots of facial tension I guess.