Last year at running camp, we (my colleague Elizabeth and I) spent hours watching videos, writing out gait analysis and explaining what we saw to hundreds of middle school and high school runners. By the end of the week, we realized something, not only were we completely exhausted, but we were saying the same things over and over again. "Lean from your ankle, not your hips" "Keep your arms from crossing your body. Your elbows should go back" "Don't reach so far out in front o