论文部分内容阅读
目的观察受试者暴露于±Gx或±Gy与+Gz复合离心机加速度作用下,复合加速度对人体抗荷耐力的影响和相关生理变化。方法分别测定6名受试者在单独+Gz作用,以及+2.5 Gx/+Gz、-1Gx/+Gz、+2 Gy/+Gz,-1 Gy/+Gz复合加速度作用时的基础+Gz耐力,观察加速度耐力情况和相关生理变化。三轴向加速度增长率均为1 G/s,峰值作用时间10 s。加速度作用过程中,受试者采用HP动作的呼吸方式,但呼气不用力,不收紧上身和腿部肌肉。结果 -1 Gy/+Gz、-1 Gx/+Gz的复合作用对基础+Gz耐力没有显著影响;+2 Gy/+Gz的复合作用时基础+Gz耐力增加(0.54±0.10)G(P<0.01);+2.5 Gx/+Gz的复合作用时基础+Gz耐力增加(0.63±0.31)G(P<0.01);心率、呼吸率与对照相比均无显著差异。±Gy/+Gz暴露时会出现不对称的视力丧失,+2.5 Gx/+Gz作用时,受试者感觉眼球前凸、压迫眼睑,眼睛有充血感。结论在采用HP动作呼吸方式的条件下,-1 Gy/+Gz、-1 Gx/+Gz复合作用对基础+Gz耐力无显著影响,+2 Gy/+Gz、+2.5 Gx/Gz的复合作用能够增加+Gz耐力。
Objective To observe the effect of compound acceleration on the anti-endurance and the related physiological changes of the subjects exposed to acceleration of ± Gx or ± Gy and + Gz compound centrifuges. Methods The basal and Gz endurance of six subjects in the combination of + Gz alone and +2.5 Gx / + Gz, -1 Gx / + Gz, +2 Gy / + Gz, -1 Gy / + Gz complex acceleration , Observed acceleration endurance and related physiological changes. Triaxial acceleration growth rate of 1 G / s, peak action time of 10 s. Acceleration during the process, subjects using HP action breathing, but not exhaled, do not tighten the upper body and leg muscles. Results The combined effect of -1 Gy / + Gz and -1 Gx / + Gz had no significant effect on basal + Gz tolerance; + Gz + + Gz increased basal + Gz tolerance (0.54 ± 0.10) G (P < 0.01). The basal + Gz endurance was increased (+0.63 ± 0.31) G (P <0.01) when + 2.5 Gx / + Gz was combined. There was no significant difference in heart rate and respiration rate compared with the control. ± Gy / + Gz asymmetry occurs when the loss of visual acuity, +2.5 Gx / + Gz role, the subjects feel the eye bulge, oppression eyelids, eyes have congestion feeling. Conclusions The combination of -1 Gy / + Gz and -1 Gx / + Gz had no significant effect on basal + Gz endurance, +2 Gy / + Gz, +2.5 Gx / Gz combined action with HP action breathing Can increase + Gz endurance.