APPENDIX F
CALCULATION OF O_{2}max
This appendix gives a stepbystep example of how a soldier can calculate O_{2}max using his allout, 2milerun time. This lets interested soldiers compare their fitness levels with others such as athletes whose O_{2}max values are published in magazines or journals.
The two equations below convert the 2milerun times of males and females to maximum oxygen uptake values. The O_{2}max values obtained are shown as the maximum amount of oxygen in milliliters used per kilogram of the person's body weight in one minute during maximum aerobic exercise. O_{2}max values are generally expressed more succinctly as ml O_{2}/kg x min.
For males, the following equation is used to calculate O_{2}max:
O_{2}max = 99.7  [3.35 x (2milerun time in decimal form)].
For females, the following equation is used:
O_{2}max = 72.9  [1.77 x (2milerun time in decimal form)].
The example below shows how to use the equation for males. The data is for a 21yearold male whose allout, 2milerun time is 12 minutes and 36 seconds.
STEP1. Express the 2milerun time as a decimal, and insert it into the equation. When 12 minutes 36 seconds is written as decimal, it becomes 12.60 minutes. (To determine what fraction of a minute 36 seconds is, divide 36 seconds by the number of seconds in one minute, that is, 60 seconds. Thus, 36/60 = 0.60. This fraction is added to the minute value to give 12.60 as the run time expressed as a decimal.) After putting the decimal form into the equation, the equation should resemble the one below.
O_{2}max = 99.7 [3.35 (12.60)]
STEP 2. Multiply the decimal form of the 2milerun time by 3.35. In this case, we get [3.35 x (12.60)], which equals 42.21. At this point, the equation should resemble the one below.
O_{2}max = 99.7 [42.21].
STEP 3. Subtract the product obtained in Step 2 from 99.7. For our example, we make the following subtraction: 99.7 [42.21]. This gives a value of 57.49. Thus, the equation should look like the one below.
O_{2}max = 57.49
This calculation reveals that a male whose allout, 2milerun time is 12 minutes 36 seconds will have a O_{2}max of approximately 57.49 ml O_{2}/kg x min.
To determine how this value or others translates into fitness ratings, refer to Table F1. It presents information for finding one's level of CR fitness based on O_{2}max. By matching a soldier's value for maximum oxygen uptake with those in the table corresponding to his age group and sex, one gets a adjectival rating (fair, good, superior, etc.).
Table F1 lists some values for O_{2}max along with their associated CR fitness levels. This table was obtained from the Institute for Aerobic Research in Dallas, Texas. These values can be used to classify a soldier's level of CR fitness based on his O_{2}max.
