Why there are differences in respiratory rate during resting after walk and after run?

Differences in respiratory rate after walking versus running are primarily due to the intensity and duration of the physical activity. Running requires more oxygen and produces more carbon dioxide than walking, leading to a higher respiratory rate to meet the increased metabolic demands. Additionally, the body’s recovery mechanisms after running involve more pronounced respiratory adjustments to restore oxygen levels and eliminate carbon dioxide. Consequently, the respiratory rate remains elevated longer after running compared to walking.