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American Journal of Clinical Nutrition, Vol 26, 64-71, Copyright © 1973 by The American Society for Clinical Nutrition, Inc.

The equations governing weight change in human beings

Vincent W. Antonetti 1

1 Manager of environmental control systems at IBM, Poughkeepsie, New York 12602

Two useful and basic equations have been derived. Equation 8 can be used to calculate the caloric intake per day required to maintain a particular weight level. Equation 10 can be used to calculate weight change as a function of time for a particular caloric intake. Tables 1 and 2 list values of coefficients KA and KB and are utilized in conjunction with equations 8 and 10.

It may be difficult in some cases to assume a constant caloric intake, and, in particular, to predict accurately the activity level. However, even in instances when exact values of the variables cannot be determined with confidence, equation 10 can be utilized to compute the range and trends of the weight loss as a function of all pertinent parameters (similar to Figs. 3 and 4). A further value of equation 10 is its organizing effect in the study of the many variables involved in weight change.




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