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Do your BMI calculation before tracking 3 mo. Fitness MB

Be sure to calculate your own BMI before you start doing your 3 mo. exercise plan.  Enter it on the Google tracking spreadsheet at:

Aerobic Fitness Test Google Sheets

Body Composition Test

While the BMI, or body mass index, does not measure actual body fat, it is a practical method to screen for weight problems. This is what you will use for requirements 6 and 8 to calculate your body composition. Remember that these measurements should only be used as a guide to the progress you make as you pursue your personal physical fitness program; they should not be used as an indicator of your overall fitness.

Calculating Your BMI

Step 1—Multiply your weight in pounds by 703.

Step 2—Divide the figure you get in No. 1 above by your height in inches.

Step 3—Divide the figure you get in No. 2 above by your height in inches.

Here is how you would calculate your BMI if your weight is 130 pounds and your height is 68 inches:

Step 1—130 × 703 = 91390

Step 2—91390 ÷ 68 = 1344

Step 3—1396 ÷ 68 = 20

This means your BMI is 20, and you are at the 50th percentile.

The Centers for Disease Control and Prevention has a quick calculator for teens to find out their body mass index. This can be handy for requirements 6 and 8. Go to, plug in the numbers, and you will almost instantly find out your BMI.

CDC Growth Charts: United States


*Developed by the National Center for Health Statistics in collaboration with the National Center for Chronic Disease Prevention and Health Promotion

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