What does cardio respiratory fitness measure

The correct answer would be, It measures the volume of oxygen consumption.

Cardiorespiratory Fitness measures the volume of oxygen consumption.

Explanation:

Oxygen Consumption is measured through the respiratory Fitness. During a physical activity like running, jogging, or doing workouts involving cardiovascular activities, the circulatory and respiratory systems of the body provide oxygen to the skeletal muscles.

When oxygen reaches the muscles, the risk of cardiovascular disease is decreased. Also the body is able to do larger muscle exercises due to increased flexibility, and the efficiency of the respiratory system also increases.

But more blood is pumped through the body due to cardiorespiratory activities is not the benefit of doing the physical activities.

take a break move to stretching and slowly work back into physically exercising if the problem continues go to a doctor or physical therapist