Guedes.3sites {bodycomp}R Documentation

Percent Body Fat Estimates Using Guedes (1985).

Description

This function calculates the percent body mass estimates based on 3 sites skinfold measurements using the equations of Guedes (1965). Population Specifications: Both sexes; Brazilian university students; Male and Female (aged 18-30).

Usage

Guedes.3sites(Sex, TR, AB, SI, TH, SB, Equation, Output.format)

Arguments

Sex

a value or a vector representing the sex declared by the subject. Two possible choices: 0 or 1.

TR

a value or a vector representing Triceps Skinfold measurement. Direction of Fold: Vertical (midline). Anatomical Reference: Acromial process of scapula and olecranon process of ulna. Measurement: Using a tape measure, distance between lateral projection of acromial process and inferior margin of olecranon process is measured on lateral aspect of arm with elbow flexed 90°. Midpoint is marked on lateral side of arm. Fold is lifted 1 cm above marked line on posterior aspect of arm. Caliper is applied at marked level.

AB

a value or a vector representing Abdominal Skinfold. Direction of Fold measurement: Horizontal. Anatomical Reference: Umbilicus. Measurement: Fold is taken 3 cm lateral and 1 cm inferior to center of the umbilicus.

SI

a value or a vector representing Suprailiac Skinfold measurement. Direction of Fold: Oblique. Anatomical Reference: Iliac crest. Measurement: Fold is grasped posteriorly to midaxillary line and superiorly to iliac crest along natural cleavage of skin with caliper applied 1 cm below fingers.

TH

a value or a vector representing Thigh Skinfold measurement. Direction of Fold: Vertical (midlin). Anatomical Reference: Inguinal crease and patella. Measurement: Fold is lifted on anterior aspect of thigh midway between inguinal crease and proximal border of patella. Body weight is shifted to left foot and caliper is applied 1 cm below fingers.

SB

a value or a vector representing Subscapular Skinfold measurement. Direction of Fold: Diagonal. Anatomical Reference: Inferior angle of scapula. Measurement: Fold is along natural cleavage line of skin just inferior to inferior angle of scapula, with caliper applied 1 cm below fingers.

Equation

desired estimation equation. Two possible choices: 1 or 2.

Output.format

desired output information. Tree possible choices: 0, 1 or 2.

Details

Sex:Use 0 for Male and 1 for Female. Equation: Use 1 for Siri (1961) equation or 2 for Brozek et al. (1963) equation. Output.format: Use 0 to display Percent Body Fat (%BF) and Body Density (BD) together; use 1 to display %BF only; use 2 to display BD only.

#'

Value

Returns a data frame with the values of the % body fat and body density from a subject assessed by skinfold measurements

References

Guedes, D.P. Estudo da gordura corporal através da mensuração dos valores de densidade corporal e espessura de dobras cutâneas em universitários.(Dissertação de Mestrado). Santa Maria (RS), Universidade Federal de Santa Maria, 1985.

Harrison GG, Buskirk ER, Carter JEL, Johnston FE, Lohman TG, Pollock ML, et al. Skinfold thicknesses and measurements technique. In: Lohman TG, Roche AF, Martorell R, editors. Anthropometric standardizing reference manual. Champaign (Illinois): Human Kinetics Books; 1991. p.55-80.

International Society for the Advancement of Kinanthropometry (ISAK), 2001. International Standards for Anthropometric Assessment. (Underdale, SA, Australia.)

Jackson, A.S., and M.L. Pollock. 1978. Generalized equations for predicting body density of men. British Journal of Nutrition 40: 497-504.

Siri, W. E. Body composition from fluid space and density. In: BROZEK, J.; HANSCHEL, A. (Eds.). Techniques for measuring body composition. Washing, D.C.:National Academy of Science, 1961. p. 223-224.

Brozek J., F. Grande, J. Anderson, et al. 1963. Densitometric analysis of body composition: Revision of some quantitative assumptions. Annals of the New York Academy of Sciences 110: 113-140.

Examples


# Predicting % body fat

df <- Guedes.3sites(Sex = 1, TR = 34, AB = 24, SI = 33, TH = 24, SB = 19,
                    Equation = 1, Output.format = 0)




[Package bodycomp version 1.0.0 Index]