Generalized equations for predicting body density of men

Abstract

I. Skinfold thickness, body circumferences and body density were measured in samples of 308 and ninetyfive adult men ranging in age from 18 to 61 years.2. Using the sample of 308 men, multiple regression equations were calculated to estimate body density using either the quadratic or log form of the sum of skinfolds, in combination with age, waist and forearm circumference.3. The multiple correlations for the equations exceeded 0.90 with standard errors of approximately +oao73 g/ml.4. The regression equations were cross validated on the second sample of ninety-five men. The correlations between predicted and laboratory-determined body density exceeded 0.90 with standard errors of approximately 0.0077 g/ml.5. The regression equations were shown to be valid for adult men varying in age and fatness.

Comparison of anthropometry to DXA: a new prediction equation for men

“…Our sample was very similar to that of Jackson and Pollock (1978) from which the professionally recommended JP7 equation was developed. For example, age, height, and weight from the current study are 32.1711.0 y, 178.87 6.9 cm, and 82.3714.1 kg, compared to 32.6710.8 y, 179.07 6.5 cm, and 74.8711.8 kg in the Jackson and Pollock study.…”

“…Intratester reliability Jackson and Pollock (1978); JP3a ¼ 3-site skinfold equation by Jackson and Pollock (1978); JP3b ¼ 3-site skinfold equation by Jackson and Pollock (1985). Dual energy X-ray absorptiometry Percent body fat was assessed by DXA (model QDR 4500A; Hologic-Delphi Systems, Bedford, MA, USA) using fan beam technology (6 min scan).…”

“…DXA %BF was used as the dependent variable. The recommendations of Jackson and Pollock (1978) were used to determine which variables should be entered into the DC equation. Summing several different combinations of three, four, and seven skinfolds created independent variables.…”

The changes in maximal oxygen uptake (V̊O2MAX) induced by physical exertion during an Antarctic expedition depend on the initial V̊O2MAX of the individuals: a case study of the Brazilian expedition

“…These seven measures were then summed to determine the ∑Skinfolds. Body fat was calculated according to the protocol proposed by Jackson and Pollock [14]. …”

Does weight loss cause the exercise-induced increase in plasma high density lipoproteins?

“…Body density was determined by hydrostatic weighing [13] and was also estimated from an equation that uses chest, abdomen, and thigh skinfold thicknesses [14]. Body composition was estimated from body density according to the equation of Siri [15], yielding percent body fat, fat body mass, and lean (non-fat) body mass.…”