摘要
目的以心率(HR)与心率变异性(HRV)作为应激水平的评价指标,分别探讨精神疲劳与运动疲劳时应激水平的变化规律。方法基于读书任务和笔算作业,研究精神疲劳时HR与HRV的变化;基于上肢力竭型运动,研究运动疲劳时HR的变化。结果高强度精神负荷过程中,受试者在实验伊始就达到了较高的应激水平,随着精神疲劳程度的增加,HR减小而HRV增大,表明精神疲劳程度与应激水平反相关,可能与生理抑制性保护有关;随着运动疲劳程度的增加,HR增加,表明运动疲劳程度与运动应激水平通常正相关,体现了机体的补偿性调整。结论精神疲劳与运动疲劳过程中,自主神经系统的活动存在较大差异,这可以从精神应激与运动应激的机理、主要承载器官和负荷强度的差别来解释。
Objective Using heart rate（HR） and heart rate variability（HRV） as stress level indices,to find out the changes of stress level in mental fatigue and physical fatigue,respectively.Methods The changes of HR and HRV during reading task and written calculation task were studied in mental fatigue,and the change of HR during exhausting physical exercise was analyzed in physical fatigue.Results Subjects showed high stress level as heavy mental load was imposed on at the beginning of the experiment.Decreased HR and increased HRV caused by physiological inhibitory protection,indicating an increased mental fatigue level,showed that mental fatigue level was opposite to mental stress level under heavy mental workload.The phenomenon that HR increased along with the physical fatigue level increasing,proved that physical fatigue degree was often consistent with physical stress level,which revealed the compensative adjustment.Conclusion The significant difference of autonomic nervous system（ANS） activity between mental fatigue and physical fatigue,may be explained by the difference between mental stress and physical stress of mechanism,mainly born organ and workload intensity.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2010年第3期157-162,共6页
Space Medicine & Medical Engineering
基金
Supported by the National Natural Science Foundation of China(No.60673013)
关键词
心率
心率变异性
自主神经系统
疲劳
应激
heart rate
heart rate variability
autonomic nervous system
fatigue
stress
