抗G紧张动作由自觉的上下肢肌肉收缩和强迫的Valsalva动作组成。这两个组成部分，通过升高血压，提高＋Gz耐力。本实验的目的在于研究这两个组成部分在1G和在载人离心机上提高＋Gz耐力方面相对的效率和疲劳性。被试者为11名健康男性，实验时测量胜动脉内血压、胸内压（由距界30 Anti-G tense movements consist of conscious Valsalva movements of upper and lower extremity muscle contractions and forcing. These two components, by increasing blood pressure, increase + Gz endurance. The purpose of this experiment was to study the relative efficiency and fatigue of these two components in terms of 1 G and improving + Gz endurance on a manned centrifuge. Subjects were 11 healthy men, the experiment measured arterial blood pressure, intrathoracic pressure (from the boundary 30