间断下体负压暴露方式对下体负压耐力的影响

目的：探讨不同方式反复下体负压锻炼对下体负压耐力的影响,以期筛选最佳的负压锻炼方式。方法：27名男性健康受试者随机分成3组,分别进行－5.33kPa8min(A组）、6.67kPa4min（B组）、6.67kPa8min（C组）的下体负压锻炼后累积应激指数（CSI）、总耐受时间（DNP）较锻炼前显著提高,A、B组上述指标无显著变化,下体负压暴露时的心率较平静状态显著升高,收缩压显著降低,舒张压无显著变化。结论：经过－6.67kPa/d8min连续8d的间断下体负压可以显著提高下体负压耐力。

Variety of lower body negative pressure tolerance after different repeated lower body negative pressure exposures

Aim: To investigate the variety of lower body negative pressure(LBNP) tolerance after different repeated lower body negative pressure exposures and select the best one. Methods: 27 health male subjects were divided into 3 groups at random and exposed in 8 consecutive daily LBNP of 5.33 kPa 8 min (group A), 6.67 kPa 4 min ( group B) ?-6.67 kPa 8 min (group C) respectively. Pre and post exposures, lower body negative pressure tolerance were measured. HR and BP are recorded during exposures. Rcsults:As compared with pre exposure,Cumulative Stress Idex(CSI) and During Negative Pressure(DNP) of group C are increased significantly after repeated LBNP exposures. During exposures HR increased and SBP decreased significantly. DBP did not change. Conclusion: LBNP tolerance were increased significantly after eight consecutive daily LBNP (-6.67kPa) exposures. Among the three modes, this is the best one.