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Do-It! Help: Inside Do-It!
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| Exercise Formulas
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Along with your Basal Metabolism, any exercise you do adds to the calories you
use each day.
The amount of calories you use during exercise depends on three factors:
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Activity: |
Some activities, such as cross country skiing, use more energy
than other activities such as a slow walk. |
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Intensity: |
The faster you do an activity, the more calories you will use for
a given time period. |
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Your Weight: |
The more you weight, the more calories you will use to complete
the same amount of work. |
Do-It! uses a chart of values for exercise based on data from the US National
Institute of Health (http://www.nih.gov ) and other sources.
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| The Weight Factor |
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The more you weight, the more calories you will use while exercising. The
exercise calorie values shown in Do-It! are personalized based on your weight.
Note: Do-It! does all this math in this section for you. It is presented
here so you'll know where the numbers come from.
Do-It! keeps a list of exercises in its database based on a 150 pound person.
The calories you use during exercise is modified by Do-It! on a factor based on
your weight.
Factor = your weight divided by 150
So as an example, Do-It! knows that 400 calories per hour that are used walking
at 4mph by a 150 pound person.
If you weigh 120, this factor would be 120/150, or: 0.8
so walking at 4mph would use 320 calories per hour: (400 *
0.8) = 320
If you weigh 180, this factor would be 180/150, or: 1.2
so walking at 4mph would use 480 calories per hour: (400 *
1.2) = 480
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