Answer to Question 1
Gas (air) analysis can determine oxygen uptake (VO2 ) as follows:
The air exhaled by a person being tested is analyzed by a metabolic cart that measures the difference in oxygen content between the person's exhaled air and the atmosphere. The air we breathe contains 21 percent oxygen; thus, VO2 can be assessed by establishing the difference between 21 percent and the percentage of oxygen left in the air the person exhales, according to the total volume of air taken into the lungs.
Answer to Question 2
The 1.5-Mile Run Test is most frequently used to predict VO2max, according to the time it takes the person to run or walk a 1.5-mile course. It requires only a stopwatch and a track or premeasured 1.5-mile course. This is one of the easiest tests to administer, but it is considered a maximal test and should not be used for unconditioned beginners, men over age 45 and women over age 55 without proper medical clearance, symptomatic individuals, or those with known disease or risk factors for heart disease.
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