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Lange
Skinfold Caliper
The fact that body components vary widely in their percentage relationship to total weight is the fundamental limitation to interpreting body weight. If the real problem is obesity rather than mere overweight, overweight and fatness must be dissociated to be understood properly.
The most direct, simple, and accurate method for estimating leanness-fatness is measuring the thickness of skinfolds by constant-tension calipers. The Lange Skinfold Calipers are specifically designed for the simple, accurate measurement of subcutaneous tissue.
The Lange Caliper incorporates the recommended principles for standardized usage in nutrition, fat distribution, child growth, anthropomorphic studies, and other applications.
It is important to use calipers in which the pressure is built into the instrument itself and is relatively constant from reading to reading and over the range of skinfold thicknesses studied. Early models of calipers were unsatisfactory in that spring-loaded tension was very low at small openings but increased rapidly as the jaws of the calipers were opened.
Experience has shown that caliper pressure of about 10 gm./sq. mm. is preferable to a very low or very high pressure and that it be constant over a range of openings from two to at least 40 mm. For the purposes of standardization, this pressure that has been recommended irrespective of the design of the caliper itself, with a contact surface from 20-40 sq. mm., depending on the shape of the surface.
Data obtained with skinfold calipers has been found to agree with measurements obtained from roentgenograms of soft tissues. In turn, these determinations of subcutaneous fat have been correlated with calculations of total body fat obtained by other methods.
Skinfold measurements, especially when combined with limb circumferences, permit finer discrimination between soft tissue sites than is possible from inspection. Such discrimination is advantageous in diagnosing individual nutritional status.
Contains operational information on the Lange Calipers. Includes skinfold instructions and tables.