Baty

Harpenden Skinfold Caliper
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LINEAR REGRESSION EQUATIONS (DURNIN & WORMERSLEY)

BODY DENSITY = C-[M(LOG10 SUM OF ALL FOUR SKINFOLDS)]

MALE
17-19 YRS
20-29 YRS
30-39 YRS
40-49 YRS
50 + YRS
C
1.1620
1.1631
1.1422
1.1620
1.1715
M
0.0630
0.0632
0.0544
0.0700
0.0779

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FEMALE
16-19 YRS
20-29 YRS
30-39 YRS
40-49 YRS
50 + YRS
C
1.1549
1.1599
1.1423
1.1333
1.1339
M
0.0678
0.0717
0.0632
0.0612
0.0645

 

THE SIRI EQUATION

Fat % = [(4.95 / BD) - 4.5] * 100

           
BODY DENSITY EQUATIONS (JACKSON & POLLOCK)

MALE BD = 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

X5 = forearm circumference in cm

FEMALE BD = 1. 1 470292 - 0.0009376 (X3) + 0.0000030 (X3)2
- 0.000 1 1 56 (X4) - 0.0005839 (X5)

  • Where

    X3 = sum of triceps, thigh and suprailiac skinfolds, in mm

    X4 = age in years

    X5 = gluteal circumference, in cm

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