At this life stage, physical activity tends to be intense because peak fitness levels are common in which period?

• A. Early adulthood
• B. Middle adulthood
• C. Late adulthood
• D. Infancy

Answer: (A)

In early adulthood, people generally reach their highest levels of physical capacity. Cardio endurance, muscular strength, power, and the ability to recover quickly from hard efforts are near their maximum then, so activities can be performed at higher intensities more often. After this period, these capacities gradually decline with aging, making sustained high-intensity activity less common. Infancy and childhood involve ongoing growth and development with different activity patterns, while middle and late adulthood see gradual decreases in fitness. So, intense physical activity is most typical in early adulthood because peak fitness levels are most commonly achieved then.