[Metabolic consequences of positive pressure respiration during exposure to acceleration]

The purpose of this study was to identify metabolic changes in pilots exposed to linear acceleration with an onset rate of 0.1 G/sec. The exposure of +Gz increased the content of of lactate dehydrogenase and the concentration of lactate dehydrogenase and the concentration of potassium and phosphorus in plasma. Positive pressure breathing of 60 hPa during acceleration enhanced its tolerance by 2.2 G, producing no effect on metabolic changes.