If you line up several people of the same age group and test them you will find significant variations in their ability to utilize oxygen. A while ago at a Natural Health Conference in Salt Lake City, several of my friends and associates did a free resting VO2 test. This test measures the amount of oxygen going in when you inhale, and the amount of carbon dioxide coming out when you exhale, and calculates your resting oxygen metabolism. It was interesting to see the different results people were getting.
