Final answer:
The cool-down is an essential and pleasant portion of a cardiorespiratory workout as it helps the body recover gradually and prevents various issues like dizziness and muscle soreness.
Step-by-step explanation:
The essential and pleasant portion of a cardiorespiratory workout is the cool-down. Cooling down after a cardio workout helps gradualize the heart rate and blood flow, prevents dizziness or fainting, reduces muscle soreness, and allows the body to recover gradually.
Learn more about Exercise and Cool-down in Cardiorespiratory Workout