[Measurements and combat of stress effects (author's transl)]

It has been shown by nineteen examples that stress of different kind diminishes markedly the arterial partial oxygen pressure (pO2) over a certain period of time. Measurements of extent and time course of this characteristic value should be useful for monitoring stress effects. Quantitative considerations of the HbO2 saturation and the exhaustion of the oxygen-binding capacity of blood demonstrated the increasing dangerousness of temporarily decreased pO2, preferably at low initial values in advanced age. Therefore, the permanent re-elevation of the arterial pO2 resting level is the method of choice for fighting against stress effects. As concrete measures for this, periodically performed and individually adapted physical exercises for young and middle-aged subjects and (in old age) the multistep oxygen regeneration process (MORP) for the lung-heart system, discovered by the author in 1977, are suitable. As is shown by statistics, the arterial pO2 resting level could be elevated permanently up to 13.3 kPa (100 mm Hg) for months or years by the latter process. A shaping of life including frequent measurements of arterial pO2 (quantitative monitoring). individually adapted physical exercises and/or the MORP requires certain expenses of technique and time, but these are worth the bother, at least in advanced age.