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Fitness Testing > Tests > Anthropometry > Body Composition > Body Density > Jackson & Pollock
Body Density Equations: Jackson & Pollock
Percent bodyfat (%BF) can be calculated from body densty using the Siri Equation.
Males
Equation 1:
Body Density = 1.0990750 - 0.0008209 (X2) + 0.0000026 (X2)2 - 0.0002017 (X3) - 0.005675 (X4) + 0.018586 (X5). Where X2 = sum of the chest, abdomen and thigh skinfolds in mm, X3 = age in years, X4 = waist circumference in cm, and X5 = forearm circumference in cm.
Equation 2:
Body Density = 1.10938 - (0.0008267 x sum of chest, abdomen and thigh skinfolds in mm ) + (0.0000016 x square of the sum of chest, abdomen and thigh) - (0.0002574 x age),
Females
Equation 1:
Body Density = 1. 1 470292 - 0.0009376 (X3) + 0.0000030 (X3)2- 0.0001156 (X4) - 0.0005839 (X5), Where: X3 = sum of triceps, thigh and suprailiac skinfolds, in mm, X4 = age in years and X5 = gluteal circumference in cm.
Equation 2:
Body Density = 1.0994921 - (0.0009929 x sum of triceps, thigh and suprailiac skinfolds) + (0.0000023 x square of the sum of triceps, thigh and suprailiac skinfolds) - (0.0001392 x age in years)
References
- Jackson, A. S., & Pollock, M. L. (1978). Generalized equations for predicting body density of men. British Journal of Nutrition, 40, 497-504.
- Jackson, A. S., Pollock, M. L., & Ward, A. (1980). Generalized equations for predicting body density of women. Medicine and Science in Sports and Exercise, 12, 175-182.
Related Pages
- More on body density
- Calculating percent bodyfat
- Skinfold Measures
- A discussion about Body Composition Testing
