Using the jackson and pollock equation outlined above she calculates that her body density is 10429 and her percentage body fat is 2464. The sum of her seven skinfold measurements is 120 mm. Body fat 495 bd 450 100 siri equation lets look at an example. As such a 45 and s 120. Skinfold testing also known as calliper testing is a commonly used method to determine a clients body fat percentage. Sarah is a 45 year old female.
Five tips for accurate consistent measurements pinch between your forefinger and thumb. Place the body fat calipers less than 12 inch from your pinch midway between the crest and the base. Skinfold calipers measure the thickness of your subcutaneous fat the fat underneath the skin at certain body locations. Skinfold measurement is based on the belief that approximately 50 of total body fat lies under the skin and involves measuring the thickness of the skinfolds at standardized sites. Pinch deep enough to get the fat you are looking for a double thick pinch of. By doing this at the key locations can be a quite accurate representative of the total amount of fat that is on your body it is also possible to estimate the total percent of bodyfat on your body.
For each of the skinfold. Once you have determined your body density you can calculate your percent body fat as follows. Measurements are taken at either 3 or 7 different sites on the body. This technique of measurement is based on the densitometry technique underwater weighing and the prediction equations are population specific. The skinfold caliper is a device which measures the thickness of a fold of your skin with its underlying layer of fat. For results to be valid and reliable the skinfold measurements must be taken properly and they should be taken by the same technician from one measurement to the next.