I think its thru blood cells im not sure though.
Answer:
A. C. and mabye D.
Explanation:
dont delete the answer please! its self explanatory.
People with asthma should obtain a medical clearance before beginning an exercise program.
Physical fitness is really good
Answer:
Cardiorespiratory endurance is measured by maximum oxygen uptake (VO2 max) and how it's used during intense exercise. Higher amounts of oxygen uptake show that you're using more oxygen and that your cardiorespiratory system is functioning efficiently.
