Ward R., Rempel R., Anderson G.S.
Department of Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada.
Am J Hum Biol. 1999;11(4):531-537. doi: 10.1002/(SICI)1520-6300(1999)11:4<531::AID-AJHB13>3.0.CO;2-6.
Real time compression of skinfolds was measured at three sites (triceps, abdominal medial calf), using a Slim Guide skinfold caliper adapted by the addition of a potentiometer, on eight males and eight females (age range 18-40 years). An average of eight trials for each subject at each site was used in modeling the compression curves. A mechanical model was developed, comprised of two parallel spring and viscous components in series with each other. $ Tt = Tinitial + F \left( { 1 \over k_1 } - \left\lceil { e { -k_1 t \over b_1 } \over k_1 } \right\rceil \right) + F \left( { 1 \over k_2 } - \left\lceil { e { -k_2 t \over b_2 } \over k_2 } \right\rceil \right) $ where: Tt = thickness at time t; Tinitial = intial skinfold thickness; F = force exerted by caliper; k(1) and k(2) = coefficients of elasticity; b(1) and b(2) = coefficients of viscosity. This two-component model was the best fitting model in comparison to one or three component alternatives. The coefficients of the model were different by sex and skinfold site. Coefficients for females showed greater elasticity and less viscosity compared to those for males. Further, there appeared to be a systematic site difference with the triceps having less elasticity and viscosity in both sexes. Am. J. Hum. Biol. 11:531-537, 1999. Copyright 1999 Wiley-Liss, Inc.
在8名男性和8名女性（年龄范围18 - 40岁）身上，使用添加了电位计改装后的Slim Guide皮褶厚度计，在三个部位（肱三头肌、腹部、小腿内侧）测量实时皮褶压缩情况。每个受试者在每个部位平均进行8次测量以建立压缩曲线模型。构建了一个力学模型，该模型由两个相互串联的平行弹簧和粘性元件组成。$ Tt = Tinitial + F \left( { 1 \over k_1 } - \left\lceil { e { -k_1 t \over b_1 } \over k_1 } \right\rceil \right) + F \left( { 1 \over k_2 } - \left\lceil { e { -k_2 t \over b_2 } \over k_2 } \right\rceil \right) $ 其中：Tt = t时刻的厚度；Tinitial = 初始皮褶厚度；F = 厚度计施加的力；k(1)和k(2) = 弹性系数；b(1)和b(2) = 粘性系数。与单组分或三组分模型相比，该双组分模型是拟合效果最佳的模型。该模型的系数因性别和皮褶部位而异。与男性相比，女性的系数显示出更大的弹性和更小的粘性。此外，似乎存在系统性的部位差异，两性的肱三头肌部位弹性和粘性都较小。《美国人类生物学杂志》11:531 - 537，1999年。版权所有1999威利 - 利斯公司。
