Which physiologic response is NOT typically observed in children when they exercise?

When children engage in exercise, they typically exhibit a physiological response characterized by adaptations that support their activity levels. One notable response is an increase in heart rate, which occurs to ensure adequate blood flow and oxygen delivery to working muscles. Consequently, a higher heart rate is a common response observed in children during physical exertion, reflecting their metabolic demands.

In addition to a higher heart rate, children also experience increased oxygen uptake and respiratory rate, both of which help meet the demands of exercise by enhancing oxygen delivery and carbon dioxide removal from the body. However, rather than experiencing a lower heart rate during exercise, children are likely to have elevated heart rates due to their more efficient cardiovascular systems at rest. Therefore, identifying a lower heart rate as a response to exercise does not align with the typical physiological responses seen in children, making it the correct answer.