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目的探讨利用下体负压模拟＋ＧＺ作用条件进行抗荷动作训练的可行性。方法７名健康男性受试者在坐位下体负压舱中做Ｌ－１抗荷动作，记录心率和血压的变化。结果－４０ｍｍＨｇ的下体负压作用可引起心率显著增加，收缩压及舒张压显著降低。在地面做Ｌ－１动作时心率、收缩压、舒张压及平均动脉血压分别为（８７．２９±９．２３）ｍｉｎ－１、（１８６．００±１１．１１）ｍｍＨｇ、（１４７．８６±９．９６）ｍｍＨｇ及（１６０．５７±８．５４）ｍｍＨｇ；而在－４０ｍｍＨｇ的下体负压作用下做Ｌ－１动作时则分别为（９２．７１±１０．９５）ｍｉｎ－１、（１６１．２９±１８．０２）ｍｍＨｇ、（１３０．７１±１３．３１）ｍｍＨｇ及（１４０．９１±１４．２１）ｍｍＨｇ。后者收缩压、舒张压及平均动脉血压较前者均显著降低（Ｐ＜０．０１），心率则无显著性差异。结论坐位下体负压可模拟＋ＧＺ引起的心血管反应，利用下体负压模拟＋ＧＺ作用环境进行抗荷动作训练是可行的。
Objective To explore the feasibility of using negative pressure simulation + GZ to carry out anti-stress training. Methods Seven healthy male subjects underwent L-1 anti-charge in the negative pressure cabin of sitting seat, and recorded the changes of heart rate and blood pressure. Results-40mmHg lower body negative pressure can cause a significant increase in heart rate, systolic and diastolic blood pressure decreased significantly. Heart rate, systolic blood pressure, diastolic blood pressure and mean arterial blood pressure were (87.29 ± 9.23) min-1, (186.00 ± 11.11) mmHg, (147.86 ± 9.96) mmHg and (160.57 ± 8.54) mmHg, respectively. When L-1 was operated under the negative pressure of -40 mmHg, the values were (92.71 ± 10.95) min-1 and 161.29 ± 18.02) mmHg, (130.71 ± 13.31) mmHg, and (140.91 ± 14.21) mmHg. The latter systolic blood pressure, diastolic blood pressure and mean arterial blood pressure were significantly lower than the former (P <0.01), heart rate was no significant difference. Conclusion The negative pressure in the sitting position can simulate the cardiovascular reaction induced by + GZ. It is feasible to use the negative pressure of the lower body to simulate the anti-stress action in the environment of GZ.