CrossFit's Definition of Fitness is?

• A. Increased work capacity across broad time and modal domains
• B. Maximal strength in a single lift
• C. Short-duration sprints with maximal effort
• D. Flexibility as the sole focus

Answer: (A)

CrossFit defines fitness as increased work capacity across broad time and modal domains. This means being able to perform more total work across a range of workout lengths and across different kinds of movements or modalities. Work capacity is the measure of fitness, not a single attribute, and the “broad time and modal domains” idea captures the ability to handle short efforts, longer workouts, and varied movement challenges—from lifting and running to gymnastic skills and beyond. In other words, fitness is about versatility and endurance to sustain productive work across many situations.

The other options miss that breadth. Focusing on maximal strength in a single lift is a narrow test of one attribute. Short-duration sprints address only a specific, high-intensity effort rather than a wide range of tasks. Flexibility as the sole focus ignores the ability to perform meaningful work across different modalities and durations.