The warm-up phase is designed to gradually raise which physiological parameter?

• A. Heart Rate and Blood Circulation
• B. VO2 Max
• C. Muscle Fatigue
• D. Appetite

Answer: (A)

During a warm-up, the body gradually increases heart rate to boost blood circulation. This higher flow delivers more oxygen and nutrients to working muscles and helps remove waste products, warming tissues and preparing the cardiovascular system for activity. VO2 max is a peak measure of maximal oxygen uptake, not something raised by a typical warm-up. Muscle fatigue and appetite aren’t the primary targets of a warm-up—the goal is to enhance readiness and performance through better circulation and tissue temperature. So the best choice is heart rate and blood circulation.