基于动态立位平衡功能的体力疲劳评估模型的构建  

Construction of physical fatigue assessment model based on dynamic upright balance function

作　　者：程珊[1] 肖潇 唐孟军[1] 马进[1] 胡文东[1] 

机构地区：[1]第四军医大学航空航天医学系医学装备教研室,陕西西安710032

出　　处：《职业与健康》2017年第18期2506-2510,共5页Occupation and Health

基　　金：军队重大科研课题(AWS12J003);国家自然科学基金与民航联合基金(U1333101)

摘　　要：目的研究体力疲劳对不同倾斜方向动态立位平衡功能的影响,并尝试构建体力疲劳判别模型。方法从第四军医大学2015级本科学员中选取符合条件的60名男性被试者,随机均分为对照组与研究组。研究组进行6个阶段的蹬力训练任务后,两组被试者需要立即进行主观疲劳感及8个方向上的动态立位平衡的测量。在试验期间,两组被试者都进行了血压、心率及呼吸率等生理参数的采集。结果与对照组相比,研究组被试者的主观疲劳感(t=2.809,P<0.01)、收缩压(t=3.789,P<0.01)、心率(t=7.494,P<0.01)与呼吸率(t=6.266,P<0.01)都明显升高。在体力疲劳影响下,身体重心向前位点调节过程中,被试者身体晃动程度在中高频段上明显增高,调节的稳定性明显下降(t=2.292,P<0.05)。同样,被试者在向其他目标点调节过程中,身体控制能力与调节能力也有不同程度的下降。根据被试向前位点调节过程中的敏感动态立位平衡参数,通过主成分分析法成功地构建了体力疲劳判别模型。与对照组相比,研究组被试的体力疲劳指数明显增高(t=3.814,P<0.01)。结论体力疲劳对不同倾斜方向上的动态立位平衡功能产生了不利影响,并且基于动态立位平衡功能构建的体力疲劳判别模型为飞行员体力疲劳评估提供了一种新思路。[Objective]To study the effect of physical fatigue on dynamic postural control of different leaning directions,further build a physical fatigue assessment model.[Methods]60 eligible male students were selected from 2015 undergraduate students of Fourth Military Medical University,and were divided into the control group and the research group. After the objects in research group finished pedaling tasks of six stages,all the objects in two groups received dynamic postural control test of eight leaning directions and subjective fatigue measurement as soon as possible. During experiment,the blood pressure,heart rate and breathing rate of all the objects also were tested.[Results]Compared with the control group,the subjective fatigue score（t=2.809,P0.01）,systolic pressure（t=3.789,P0.01）,heart rate（t=7.494,P0.01） and breathing rate（t=6.266,P0.01） of the research group increased significantly. Under the effect of physical fatigue,body sway intensity on medium-high frequency bands increased significantly,and postural adjusting stability got worse（t=2.292,P0.05） when body gravity moved to the front target. Likewise,body sway intensity and postural adjusting ability also decreased in some degree when body leaned to other directions. Based on the sensitive parameters of dynamic upright balance in front direction,physical fatigue assessment model was successfully built by principle component analysis. Compared with the control group,physical fatigue index of the research group increased significantly（t=3.814,P0.01）.[Conclusion]Physical fatigue has an adverse effect on dynamic upright balance function of different leaning directions,and the physical fatigue assessment model based on dynamic upright balance function provides a new method in physi-cal fatigue assessment of pilots.

关 键 词：体力疲劳 疲劳评估 动态立位平衡 

分 类 号：R857.1[医药卫生—航空、航天与航海医学]