One of the core lectures offered at the CrossFit Level 1 Seminar introduces CrossFit’s definition of fitness as “your work capacity across broad time and modal domains.” This definition means that fitness is measurable and can be quantified by plotting your training results—such as times, loads, and reps or rounds—on a line graph. With power output on the Y-axis and duration of effort on the X-axis, you can plot the power output for any given effort. By measuring your power output across several