Which statement about the health benefits of aerobic exercise is true?

• A. It can improve sleep
• B. It has no effect on energy levels
• C. It always increases body fat
• D. It reduces joint health

Answer: (A)

Regular aerobic exercise can improve sleep quality, helping you fall asleep faster and enjoy more restorative sleep. This happens as aerobic activity helps regulate the body's circadian rhythm, reduces stress hormones, and enhances overall energy metabolism, which supports better sleep. The statement that it has no effect on energy levels isn’t accurate because, over time, aerobic training improves cardiovascular efficiency and stamina, often increasing daytime energy. It’s also not true that aerobic exercise always increases body fat; in fact, consistent aerobic activity tends to reduce body fat when paired with sensible eating. And rather than reducing joint health, regular moderate aerobic activity generally supports it by strengthening the muscles around the joints and improving joint lubrication, though very high-impact or improper technique can irritate joints in some people.