Which statement is true about the relationship between activity level and physical fitness?

• A. There is no such thing as too much physical activity.
• B. No pain, no gain.
• C. Being fit can only be gained through activity.
• D. Active people are more physically fit.

Answer: (D)

Regular activity level drives adaptations that improve fitness. When you engage in consistent, appropriately challenging movement, your heart and lungs become more efficient, your muscles gain strength and endurance, and your body's systems become better at using energy. Because of these changes, people who stay active usually show higher levels of physical fitness than those who are sedentary, so the statement that active people are more physically fit is true.

Keep in mind that fitness also depends on recovery, nutrition, and how intensely and how often you train. Overdoing activity without adequate rest can lead to injury or burnout, and pain isn’t a reliable marker of progress. Also, while activity is essential for fitness gains, it’s not the only factor— genetics and lifestyle influence how quickly and how well someone improves.