男女受试者+Gz耐力差异的载人离心机试验研究  

Study on +Gz-tolerance difference between male and female subjects by human centrifuge

作　　者：金朝[1] 李宝辉[1] 王全[1] 徐艳[1] 吴三元[1] 卫晓阳[1] 耿喜臣[1] 颜桂定[1] 马月欣[1] 

机构地区：[1]空军航空医学研究所,北京,100142

出　　处：《中华航空航天医学杂志》2013年第1期-,共4页Chinese Journal of Aerospace Medicine

摘　　要：目的 检测男、女受试者的基础及紧张+Gz耐力,分析和探讨+Gz耐力的性别差异.方法 6名女性和7名男性健康志愿者参加了本项研究.首先用微压表检测最大呼气压力,然后在载人离心机上完成基础+Gz耐力、使用抗荷装备并做PHP抗荷动作时的紧张+Gz耐力测试.用独立样本t检验法对数据进行统计学分析. 结果 男性受试者的最大呼气压力为(26.6±5.4)kPa,显著大于女性受试者[(19.7±5.8) kPa],差异有统计学意义(t=2.234,P=0.047).女性受试者的基础耐力为(3.50±0.32)G,比男性受试者[(3.30±0.20)G]略高,但差异无统计学意义(t=0.113,P=0.835).女性受试者的紧张+Gz耐力为(6.00±0.55)G,显著小于男性受试者[(8.50±0.00)G],差异有统计学意义(t=11.180,P=0.000). 结论 男、女受试者的基础+Gz耐力差异不显著,但男性受试者的紧张+Gz耐力高于女性.呼吸肌力量小、抗荷服不合身及缺乏离心机试验经验等是影响女受试者G耐力的不利因素.Objective To investigate the gender differences on +Gz-tolerance by comparing the relaxed and straining G tolerances of females and males.Methods Investigations were done from six female and seven male healthy volunteers.The maximum expiration pressure was measured by a pressure meter.The relaxed and straining G tolerances of subjects were determined by a series of rapid-onset runs (RORs) on the centrifuge.The relaxed G tolerance was tested when subjects were not protected by any anti-G method.When straining G tolerance concerned,the anti-G suit and positive pressure breathing for G (PBG) were used and subjects performed PHP straining maneuver.Statistical analysis was accomplished by using an Independent-Samples t Test with a level of significance set at P＜0.05.Results Male subject's maximum exhalation pressure was greater than that of female subjects [(26.6±5.4) kPa vs (19.7±5.8) kPa; t=2.234,P=0.047].The relaxed G tolerance of females was slightly higher than that of males [(3.50±0.32) G vs (3.30±0.20) G],but the difference was not significant(t=0.113,P=0.835).The straining G tolerance of females was significantly lower than that of males [(6.00±0.55) G vs (8.50±0.00) G; t=11.180,P=0.000].Conclusions The gender difference of relaxed + Gz tolerance is not significant,but the straining G tolerance of males is significantly greater than that of females.The reasons of tampering female subject's G tolerance would be as follows:less breathing muscle strength,poor anti-G suit fitting,and lack of G exposure experience.

关 键 词：身体耐力 加速度 超重力 性别因素 抗重力服 

分 类 号：R[医药卫生]