What is the difference between pulse ox and VO2 max measurements and how do they relate to each other in assessing overall health and fitness levels?

Pulse ox measures oxygen saturation in the blood, while VO2 max measures the maximum amount of oxygen a person can use during exercise. Pulse ox gives a snapshot of oxygen levels at a specific moment, while VO2 max indicates overall cardiovascular fitness. Both measurements are important in assessing health and fitness, with pulse ox reflecting immediate oxygen levels and VO2 max indicating overall aerobic capacity.