Effects of +Gz acceleration on human body systems as a form of training based of physiological data evaluation

Twenty-five men with decreased acceleration tolerance limits were subjected to two weeks centrifuge training, in which selected characteristics of +Gz acceleration (head-feet directed) were applied. The training loads were controlled basing on the responses of blood flow velocity and heart rate. The results show that the human centrifuge training in which the graded loads are based on measurement of these parameters, increases acceleration tolerance limits. It is also demonstrated that the human centrifuge training methods can be used in pilots after convalescence period or on finding lowered acceleration tolerance produced by other causes. The physical and physiological methods of increasing acceleration tolerance limits (ATL) consist some of the most important and urgent problems of today to be solved in modern military aviation. This demand is produced not only by the systematically increasing requirements as to the highest health performance of the military pilot, but also by the enormous costs of the flying equipment and training. In the group of different methods of increasing ATL, the human centrifuge training is an open problem. The available literature presents only a few reports in which the +Gz acceleration (i.e. head-pelvis directed) was used as the loading stimulus in pilots' training. The reasons for the lack of interest in this direction of examination include: easily developed decompensation of the circulatory system; cummulated effects of acceleration, and lack of optimal criteria to evaluate the body systems loads. Moreover, the positive effects of training could be baffled by the above mentioned factors.(ABSTRACT TRUNCATED AT 250 WORDS)