■ Determination of the body density in 10 3 kg/m 3 based on sum logarithm (L), subject gender and age group. ■ Computation of the logarithm of the sum of the four skinfolds in mm. In order to perform the calculations, the following steps are applied: In the original study the measurements have been taken on the right side of the body, however, no statistical difference has been observed between measurements on either sides. ■ Suprailiac – Diagonal fold, immediately superior and in line with the angle of the iliac crest, on the anterior axillary line. ■ Subscapular – Diagonal 45 degrees fold, 1-2 cm below the angle of the scapula. The arm should be held freely to the side of the body. ■ Triceps – Vertical fold on the posterior midline of the upper arm, halfway between the bony processes (shoulder and elbow). ■ Biceps – Vertical fold on the anterior aspect of the arm, approximately 1 cm above the level of the triceps site. The method is said to have limited population specificity because it has been developed based on the study of a heterogenous group.īefore inputting data in the body fat skinfold calculator by Durnin and Womersley, measure the skinfold in milimeters in the 4 areas described below: This is one of the most accurate skinfold methods, alongside the J ackson and Pollock formulas for 3, 4 or 7 sites.Īccording to the original study, the 4 site formula by Durnin and Womersley can be applied in the case of 16 to 72 year olds. This health tool estimates body fat percentage based on skinfold measurements from 4 sites. Because each person is medically different, individuals should consult their own personal physicians for specific information and/or treatment recommendations.How does the body fat skinfold by Durnin and Womersley calculator work? Remember: the above information is for general purposes only and should not be construed as definitive or binding medical advice. In the medical practice the emphasis is often on the relative fat% indication for specific clients (change in relation to treatment) not on absolute fat%. Skinfolds (SKF) measurements can use the thickness of subcutaneous adipose tissue, to estimate body density once this is known for an individual, % body fat can be estimated using normative data for their age, gender, race and fitness level. Measure a third time if there is more than a 10% discrepancy. Skinfolds Technique - how to maximise accuracy.ġ) All measurements are taken on the right side of the body.Ģ) Locate site (mark with texta for beginners) and ensure that this is where the fingers pinch the skin.ģ) Pinch skin between thumb and index finger so that a fold of skin creates an elevated line in the desired direction.Ĥ) Clamp the calipers perpendicular to the fold and 1 cm lateral or inferior to the thumb and the index finger.ĥ) Maintain pressure with fingers and calipers reading measurment after 2 seconds.Ħ) Unclamp calipers from skin release tension slowly so as not to damage them, then relax thumb and index finger.ħ) Take each measurement in sequence and then repeat. Because the body fat amount can not be detected by appearance, it is important to monitor body fat level. The higher the amount of body fat the higher the risk of serious illness such as heart disease and stroke. When a man measures higher than 20% body fat and a woman measures over 25%, he/she is considered obese. What is body fat and why is it important to monitor? Body fat is stored energy. Standards for Women (SKF - Body Fat percentage) Standards for Men (SKF - Body Fat percentage)
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