Calculate Body Fat Index
BMI (Body Mass Index) is not effective for bodybuilders, pregnant women and athletes, since it is based on the weight / height in the population previously named a deviation that does not correspond with reality.
The percentage of body fat is an assessment of the amount of fat in your body, being a reliable measure in weight reduction programs, especially when combined with body weight.
Since it may be the case that thin people, checking on measurements of body fat and yet, the weight remains the same or higher.
This is because if you were doing exercise, the muscle that has developed weighs more than fat.
Anyway, it is important to have a rough idea of the percentage of fat, to be able to design a fitness program.
Deurenbergl formula to calculate the percentage of fat based on BMI is:
% BF = (1.2 x BMI) + (0.23 x age) – (10.8 x sex) – 5.4
where sex = 1 for males and sex = O for women.
BMI = Weight (kg) / height ² (m)
There are also forms of Hodgdon and Beckett. The formulas require measurements in centimeters with a precision of 0.5 cm.
Formula to calculate the percentage of body fat in men
*% Fat = 495 / (1.0324 – 0.19077 (log (waist-neck)) + 0.15456 (log (height))) – 450
Formula to calculate the percentage of body fat in women
*% Fat = 495 / (1.29579 – 0.35004 (log (waist + hip-neck)) + 0.22100 (log (height))) – 450
The comparative table of values is:
* Women
or 10-12% essential fat
14-20% or Athlete
or 21-24% Fitness
or 25-31% Acceptable
Obesity or 32% or more
* Men
or 2-4% essential fat
6-13% or Athlete
or 14-17% Fitness
or 18-25% Acceptable
Obesity or 26% or more
Anyway, the best method with less diversion has to be done in a laboratory with a specialist.