Bircher M, Kohl J, Nigg B, Koller E A
Eur J Appl Physiol Occup Physiol. 1978 Aug 15;39(2):99-109. doi: 10.1007/BF00421714.
Changes of whole-body microvibrations (MV) were quantitatively analyzed in 123 voluntary subjects during two examination situations and compared with the results obtained during the ensuing vacation. The force oscillations in the three space directions were measured during quiet bipedal standing and simultaneously recorded as a time function with the rectified and integrated force-time function (= rectified impulse). The rectified impulses related to body weight were used as a measure for the MV. Immediately before the examinations, all the subjects showed high values. These decreased significantly in the control measurement if the subjects passed the exams, but remained relatively high in the subjects who failed. In all three measurements, smokers and candidates who took tranquilizers before the exams show higher MV values than do the other subjects. Females are less tense than males, a difference particularly significant in the vertical (z) direction. The rectified impulse in this direction correlates positively with the estimated cardiac output. Body weight and body length show a positive correlation with the MV values in the horizontal forward-backward (x) and vertical (z) direction. The measurement of the whole-body MV enables quantitative evaluation of the complex load due to an examination situation. The hypothesis that different types of stress or personality affect given directions in space requires further investigation.
对123名自愿受试者在两种检查情况下的全身微振动（MV）变化进行了定量分析，并与随后假期期间获得的结果进行了比较。在安静的双足站立期间测量三个空间方向上的力振荡，并同时将其记录为具有整流和积分力-时间函数（=整流脉冲）的时间函数。与体重相关的整流脉冲用作MV的度量。在检查前，所有受试者的值都很高。如果受试者通过考试，在对照测量中这些值会显著下降，但在未通过考试的受试者中仍相对较高。在所有三次测量中，吸烟者和考试前服用镇静剂的受试者的MV值高于其他受试者。女性比男性更放松，这种差异在垂直（z）方向上尤为显著。该方向上的整流脉冲与估计的心输出量呈正相关。体重和身高与水平前后（x）和垂直（z）方向上的MV值呈正相关。全身MV的测量能够对检查情况引起的复杂负荷进行定量评估。不同类型的压力或性格会影响空间中特定方向的假设需要进一步研究。
