calculate_bfp: Calculate body fat percentage

In MarijnJABoer/befitteR: A bundle of health, fitness, food and body related equations, formula's and more, so you can become fit

Description

\lifecycle

maturing

This function calculates body fat percentage using several equations. These functions use different arguments. Note that the us-navy function is meant to estimate body fat percentage for people aged 20 to 40. Keep in mind that these calculations are estimates.

Usage

calculate_bfp(
  weight,
  height,
  age = NULL,
  sex,
  waist = NULL,
  neck = NULL,
  hip = NULL,
  bench = NULL,
  squat = NULL,
  equation = "us-navy"
)

Arguments

weight	weight in kg
height	height in centimeters
age	age in year, Default: NULL
sex	one of male or female
waist	waist circumference, Default: NULL
neck	neck circumference, Default: NULL
hip	hip circumference, Default: NULL
bench	bench press 1RM, Default: NULL
squat	squat 1RM, Default: NULL
equation	equation, Default: 'us-navy'

Details

Measure the neck just below height of larynx. For men, measuring the circumference of waist should be around navel for men, at level of smallest width for women. For women: measure the hip at largest horizontal width level. The calculation is based on the following equation:

BFP_{us-navy|male} = \frac{495}{1.0324 - (0.19077 \times log10(waist - neck)) + (0.15456 \times log10(height))} - 450

BFP_{us-navy|female} = \frac{495}{1.29579 - (0.35004 \times log10( waist + hip - neck)) + (0.22100 \times log10(height))} - 450

BFP_{bmi|male} = 1.20 \times bmi + 0.23 \times age - 10.8 - 5.4

BFP_{bmi|male} = 1.20 \times bmi + 0.23 \times age - 5.4

Value

Body fat percentage

Examples

# us-navy based
calculate_bfp(
  height = 180, sex = "male", waist = 80, neck = 35, equation =
    "us-navy"
)

# BMI based
calculate_bfp(
  weight = 80, height = 170, age = 30, sex = "male", equation =
    "bmi"
)

# Woolcott
calculate_bfp(
  weight = 80, height = 170, sex = "male", waist = 80, equation
  = "woolcott"
)

# Strongur
calculate_bfp(
  weight = 80, height = 170, sex = "male", squat = 100, bench = 75, equation
  = "strongur"
)

# YMCA
calculate_bfp(
  weight = 80, sex = "male", waist = 80, equation = "ymca"
)

MarijnJABoer/befitteR documentation built on April 24, 2020, 5:43 a.m.