Which of the following is NOT listed as a domain of fitness that improves through training?

• A. Cardiorespiratory Endurance
• B. Speed
• C. Strength
• D. Flexibility

Answer: (B)

The concept being tested is which physical qualities are typically considered core fitness domains that respond to training. Cardiorespiratory endurance, muscular strength, and flexibility are widely recognized as fundamental domains; they reliably improve with specific training—aerobic work for endurance, resistance work for strength, and stretching/mobility work for flexibility. Speed, while crucial for performance and trainable through targeted drills, is usually treated as a performance attribute or a component of power rather than a standalone fitness domain in many certification frameworks. Because of that, speed isn’t listed as one of the core domains, making it the option that isn’t listed.