[Human reactions to prolonged centripetal accelerations (+Gz) of small magnitudes]

The effect of centripetal acceleration (+Gz) of low values (0.5-0.6 g) applied for four days against the background of relative hypokinesia was investigated. The peripheral and intracranial circulations, equilibrium function and morphological composition of the capillary blood were examined. During the first three centrifugation days the hemodynamic state differed insignificantly from the initial level. On the fourth day signs of cardiovascular deconditioning were found. This was shown by the orthostatic test. Changes in the peripheral blood indicated a moderate stress-reaction that persisted throughout the entire experiment. Equilibrium changes that were observed on the first centrifugation day regressed and the post-test function did not essentially differ from the initial level. The experimental results give evidence that inertia forces can be used to diminish the unfavorable effects of hypokinesia.