高原抗荷体能训练对+Gz耐力的影响

Effects of anti-G physical training on +Gz tolerance in plateau

目的 通过观察高原抗荷体能训练对+Gz耐力的影响,探讨高原抗荷体能训练对保持+Gz耐力的作用. 方法 12名男性健康志愿者,分为对照组与训练组,每组各6名.在海拔3780 m的高原,对照组不进行抗荷体能训练,训练组按照制定的高原抗荷体能训练方案在氧浓度为25％～27％的富氧室内进行训练.进入高原第2周、第4周、第6周,在飞行员抗荷抗缺氧能力检测仪上对受试者进行HP动作+Gz耐力值检测.进入高原前和回到平原后分别在载人离心机上进行基础+Gz耐力值和HP动作+Gz耐力值测试. 结果 ①在高原驻训期间,对照组HP动作提升+Gz耐力值呈持续下降趋势,第6周明显低于第2周,差异有统计学意义(P=0.009)；训练组第2周、第4周和第6周HP动作提升+Gz耐力值差异无统计学意义.2组受试者第6周与第2周HP动作提升+Gz耐力值变化量比较差异有统计学意义(t=3.059,P=0.012).②2组受试者高原驻训后离心机测试的基础+Gz耐力值比驻训前均有降低；对照组高原驻训后离心机测试的HP动作+Gz耐力值比驻训前明显降低(t=5.196,P=0.014),训练组高原驻训后比驻训前明显提高(t=2.712,P=0.042).2组受试者高原驻训前后HP动作提升+Gz耐力值变化量差异有统计学意义(t=3.480,P=0.008). 结论 高原驻训期间,在富氧体训室系统开展抗荷体能训练能够有效保持+Gz耐力.

Objective To investigate the significance of anti-G physical training on keeping + Gz tolerance of the subjects in plateau.Methods Twelve male healthy volunteers were divided into control group (n=6) and training group (n=6).At 3780 m altitude,the training group subjects were trained according to the designed training program in oxygen enriched room (oxygen concentration:25 ％-27 ％) and the control group subjects were not trained.The subjects' HP maneuver +Gz tolerance was measured with the equipment to test their anti-G and anti-hypoxia capabilities at the 2nd,4th and 6th week after entering plateau.Before entering plateau and after withdrawing,the relaxed and HP maneuver + Gz tolerances of the subjects were determined with human centrifuge.Results ① During 6 week training in plateau,the advancement of HP maneuver +Gz tolerance of control group showed continuously decreased tendency,and +Gz tolerance at 6th week was significantly lower than that at 2nd week (P=0.009).There was no statistical difference of.HP maneuver +Gz tolerance advancement among that at 2nd,4th and 6th week in the training group.The advancement variation of HP maneuver + Gz tolerance was significantly different between control group and training group (t=3.059,P=0.012).②Compared with that before entering plateau,the relaxed centrifuge-test +Gz tolerance of subjects in 2 groups was slightly decreased as they were in plateau.Compared with that before entering plateau,centrifuge-test HP maneuver enhanced +Gztolerance of control group was significantly decreased after entering plateau (t =5.196,P =0.014),while that of training group after entering plateau was significantly increased (t=2.712,P 0.042).Variation on HP maneuver enhanced + Gz tolerances before and after entering plateau had significant difference between 2groups (t=3.480,P=0.008).Conclusions Such anti G physical training measures as choosing proper training items and intensity,exercising in oxygen-enriched environment,while trainings were mainly on strength and were supplemented by endurance,would effectively keep pilot's +Gz tolerance in plateau.