Zhang L F, Wu X Y, Jiang S Z, Zhang R, Ma M C
Department of Aerospace Physiology, Fourth Military Medical College, Xian, China.
Adv Exp Med Biol. 1988;222:523-33.
The physiological and psychophysical effects of combined flow resistive loads were studied systematically by using the Multistage Evaluation Scale (MES), determining the number of Just Noticeable Difference (JND) steps, and constructing equivalent resistive-load-sensation contours. During combined resistive loading, the relative changes of inspiratory and expiratory peak flow rate (VImax/VEmax) were related to both the JND step number and the inspiratory versus expiratory resistance ratio (IR/ER). However, the ratio VImax/VEmax was related to the IR'/ER' ratio only. The subject's perception of combined loads differing both in intensity and IR/ER ratio could be well depicted by the equivalent resistive-load-sensation contours. Hence we could define a model for predicting the physiological and psychophysical effects of various resistive loading conditions.
通过使用多级评估量表（MES）、确定最小可觉差（JND）步骤数以及构建等效阻力负荷感觉等值线，系统地研究了组合流阻负荷的生理和心理物理效应。在组合阻力负荷期间，吸气和呼气峰值流速的相对变化（VImax/VEmax）与JND步数以及吸气与呼气阻力比（IR/ER）均相关。然而，VImax/VEmax比值仅与IR'/ER'比值相关。等效阻力负荷感觉等值线能够很好地描绘受试者对强度和IR/ER比值均不同的组合负荷的感知。因此，我们可以定义一个模型来预测各种阻力负荷条件下的生理和心理物理效应。
