In CrossFit's three-dimensional fitness model, which three dimensions are used to plot health?

• A. Power, duration, and intensity
• B. Power, duration, and age
• C. Strength, cardio, and age
• D. Endurance, skill, and age

Answer: (B)

In this three-dimensional view of health, CrossFit uses power, duration, and age as the three axes. Power measures how much work you can produce quickly—your peak output in a short burst. Duration covers how long you can maintain effort or sustain activity. Age is included to reflect changes in capacity as you move through life, capturing how fitness evolves with aging. Together, these three dimensions allow you to map overall health and how someone’s performance potential shifts across different life stages.

This combination makes sense because it pairs the speed or intensity of effort (power) with the persistence of effort (duration) and grounds it in where you are in life (age). The other options mix in different terms like intensity, strength, or skill, which aren’t used together with power and duration in this model, or replace age with a different factor that doesn’t align with how the three-dimensional framework is intended to represent health across the lifespan.