Detection and Recuperation of Mental Fatigue

Mental fatigue is a complex state that results from prolonged cognitive activity. Symptoms of mental fatigue can include change in mood, motivation, and temporary deterioration of various cognitive functions involved in goal-directed behavior. Extensive research has been done to develop methods for recognizing physiological and psychophysiological signs of mental fatigue. This has allowed the development of many AI-based models to classify different levels of fatigue, using data extracted from eye-tracking device, EEG, or ECG. In this paper, we present an experimental protocol which aims to both generate/measure mental fatigue and provide effective strategies for recuperation via VR sessions paired with EEG and eye tracking devices. This paper first provides a comprehensive state-of-the-art of mental fatigue predictive factors, measurement methods, and recuperation strategies. Then the paper presents an experimental protocol resulting from the state-of-the-art to 1) generate and measure mental fatigue and 2) evaluate the effectiveness of virtual therapy for fatigue recuperation, using a virtual reality (VR) simulated environment. In our work, we successfully generated mental fatigue through completion of cognitive tasks in a virtual simulated environment. Participants showed significant decline in pupil diameter and theta/alpha score during the various cognitive tasks. We trained an RBF SVM classifier from Electroencephalogram (EEG) data classifying mental fatigue with 95% accuracy on the test set. Finally, our results show that the time allocated for virtual therapy did not improve pupil diameter in post-relaxation period. Further research on the impact of relaxation therapy on relaxation therapy should allocate time closer to the standard recovery time of 60 min.

Brain Functional Network Improved by Magnetic Stimulation at Acupoints during Mental Fatigue

To investigate the effects of magnetic stimulation at acupoints on brain functional network during mental fatigue, magnetic stimulation was applied to stimulate SHENMEN (HT7), HEGU (LI4) and LAOGONG (PC8) acupoint in this paper. The brain functional networks of normal state, mental fatigue state and stimulated state were constructed and the characteristic parameters were comparatively studied based on the complex network theory. The results showed that the connection of the network was enhanced by stimulating the HT7, LI4 and PC8 acupoint. In conclusion, magnetic stimulation at acupoints can effectively relieve mental fatigue.

Neural Mechanisms of Mental Fatigue Revisited: New Insights from the Brain Connectome

Maintaining sustained attention during a prolonged cognitive task often comes at a cost: high levels of mental fatigue. Heuristically, mental fatigue refers to a feeling of tiredness or exhaustion, and a disengagement from the task at hand;it manifests as impaired cognitive and behavioral performance. In order to effectively reduce the undesirable yet preventable consequences of mental fatigue in many real-world workspaces, a better understanding of the underlying neural mechanisms is needed, and continuous efforts have been devoted to this topic. In comparison with conventional univariate approaches, which are widely utilized in fatigue studies, convergent evidence has shown that multivariate functional connectivity analysis may lead to richer information about mental fatigue. In fact, mental fatigue is increasingly thought to be related to the deviated reorganization of functional connectivity among brain regions in recent studies. In addition, graph theoretical analysis has shed new light on quantitatively assessing the reorganization of the brain functional networks that are modulated by mental fatigue. This review article begins with a brief introduction to neuroimaging studies on mental fatigue and the brain connectome, followed by a thorough overview of connectome studies on mental fatigue. Although only a limited number of studies have been published thus far, it is believed that the brain connectome can be a useful approach not only for the elucidation of underlying neural mechanisms in the nascent field of neuroergonomics, but also for the automatic detection and classification of mental fatigue in order to address the prevention of fatigue-related human error in the near future.

Lempel-Ziv complexity changes and physiological mental fatigue level during different mental fatigue state with spontaneous EEG

The objective was to study changes in EEG time-domain Kolmogorov complexity under different mental fatigue state and to evaluate mental fatigue using Lempel-Ziv complexity analysis of spontaneous EEG in healthy human subjects. EEG data for healthy subjects were acquired using a net of 2 electrodes (Fp1 and Fp2) at PM 4:00, AM 12:00 and AM 3:00 in the 24 hours sleep-deprived mental fatigue experiments. It was presented that initial results for eight subjects examined in three different mental fa-tigue state with 2-channel EEG time-domain Lempel-Ziv complexity computations. It was found that the value of mean Lempel-Ziv com-plexity corresponding to a special mental state fluctuates within the special range and the value of C(n) increases with mental fatigue increasing for the total frequency spectrum. The result in-dicates that the value of C(n) is strongly cor-relative with the mental fatigue state. These re-sults suggest that it may be possible to nonin-vasively differentiate different mental fatigue level according to the value of C(n) for particular mental state from scalp spontaneous EEG data. This method may be useful in further research and efforts to evaluate mental fatigue level ob-jectively. It may also provide a basis for the study of effects of mental fatigue on central neural system.

Monitoring Mental Fatigue in Analog Space Environment Using Optical Brain Imaging

Accurate assessment of mental fatigue level would improve operational safety and efficacy of astronauts for long-term space flight. Identification of neurophysiological markers can index impending overload or fatigue before performance decrements using neuroimaging technologies. The current study utilized functional near-infrared spectroscopy (fNIR) to investigate the relationship of hemodynamic response in prefrontal cortex with changes of mental fatigue level, task performance (reaction time) during n-back working memory task and routine work task in analog space environment. Results indicated that the information entropy of hemodynamic response is related to task performance and subjective self-reported measures;the reaction time is predicted by regression analysis;and the accuracy of mental fatigue classification approaches 90%. Since fNIR is a portable, wearable and minimally intrusive methodology, it has the potential to be deployed in future space environments to monitoring mental fatigue and assessing the effort of operators in field environments.

Gene-Eden-VIR Decreased Physical and Mental Fatigue in a Post Marketing Clinical Study That Followed FDA Guidelines;Results Support Microcompetition Theory

Objective: The Microcompetition with Foreign DNA theory, proposed by Hanan Polansky in 2003, describes how latent viruses can cause chronic conditions, including fatigue. The Gene-Eden-VIR formula was designed to target latent viruses. Therefore, the theory predicts that treatment with Gene-Eden-VIR will decrease fatigue in individuals infected with a latent virus. The objective of this study was to test this prediction. Framework: A post marketing clinical study that followed FDA guidelines. Treatment: Gene-Eden-VIR, a dietary supplement. A capsule of Gene-Eden-VIR includes 100 mg of quercetin, 150 mg of green tea extract, 50 mg of cinnamon extract, 25 mg of licorice extract, and 100 mcg of selenium. The treatment included 1, 2, 3, or 4 capsules per day, and lasted 2 to 54 weeks. Population: 100 individuals infected with a latent virus, including the Human Papillomavirus (HPV), Epstein Barr Virus (EBV), Herpes Simplex Virus (HSV), Human Cytomegalovirus (HCMV), and Hepatitis C Virus (HCV). Ages ranged from 20 to 66. All participants reported a feeling of fatigue at the start of the study. Specifically, 98, 90, and 79 participants reported a feeling of general, physical, and mental fatigue, respectively. Results: Following treatment with Gene-Eden-VIR, 73.47%, 62.22%, and 47.36% reported a decrease in their feeling of general, physical, and mental fatigue, respectively. The participants also reported a statistically significant decrease in every aspect of fatigue tested in the study. The results also showed a duration effect, that is, those treated for 2 months or more reported a larger decrease in their feeling of fatigue (general, p = 0.03, n = 65;physical and mental, p = 0.05, n = 70). The results showed no interviewer bias, and no selection bias. In addition, the results showed therapeutic consistency under varying manufacturing conditions. The participants reported no side effects after taking Gene-Eden-VIR. Conclusions: This post marketing clinical study showed that treatment with Gene-Eden-VIR safely decreased the feeling of general, physical, and mental fatigue in individuals infected with a latent virus. Since most individuals are infected with a latent virus, health care practitioners should recommend Gene-Eden-VIR as a first line treatment for fatigue. The results of this post marketing clinical study support the Microcompetition with Foreign DNA theory.

Evaluation of mental fatigue based on multipsychophysiological parameters and kernel learning algorithms

Mental fatigue is an extremely sophisticated phenomenon, which is influenced by the environment, the state of health, vitality and the capability of recovery. A single parameter cannot fully describe it. In this paper, the effects of long time sustained low-workload visual display terminal (VDT) task on psychology are investigated by subjective self-reporting measures. Then power spectral indices of HRV, the P300 components based on visual oddball and wavelet packet parameters of EEG are combined to analyze the impacts of prolonged visual display terminal (VDT) activity on autonomic nervous system and cen-tral nervous system. Finally, wavelet packet parameters of EEG are extracted as the features of brain activity in different mental fatigue states. Kernel principal component analysis (KPCA) and support vector machine (SVM) are jointly applied to differentiate two states. The statistic results show that the level of both subjective sleepiness and fatigue increase significantly from pre-task to post-task, which indicate that the long time VDT task induces the mental fatigue to the subjects. The predominant activ-ity of autonomic nervous system of subjects turns to the sympathetic activity from parasympathetic activity after the task. The P300 components and wavelet packet parameters of EEG are strongly related with mental fatigue. Moreover, the joint KPCA-SVM method is able to effectively reduce the dimension-ality of the feature vectors, speed up the convergence in the training of SVM and achieve a high rec-ognition accuracy (87%) of mental fatigue state. Multipsychophysiological measures and KPCA-SVM method could be a promising tool for the evaluation of mental fatigue.

Unhealthy Mental States Are Positively Associated with Subjective Pain or Fatigue in Specific Body Sites among High School Teachers in Japan

Unhealthy mental states have become common among teachers recently. Subjective physical symptoms are more likely to appear more readily than mental symptoms. In this study, we revealed that the relationship between mental states and subjective physical fatigue or pain in seven body sites among 2449 teachers. The 12-item General Health Questionnaire (GHQ-12) was used to assess mental state. We defined a score of 4 points and over in the GHQ-12 score as unhealthy mental state. We also asked about the presence of subjective physical fatigue or pain in each seven body sites in the past one year. In the results, 30.3% unhealthy mental states were found in females and 22.9% in males. Most of subjective physical fatigue or pains were detected in neck and shoulder, eyes, head and low back. Using multivariate logistic regression, higher scores in the GHQ-12 were positively associated with presence of subjective fatigue or pain in head and eyes in both genders, in lower extremities among females, and in back, upper extremities among males. Our results suggest that physical symptoms in specific body sites with gender differences may be useful in the early identification of unhealthy mental states among teachers. We should have efforts to pay attention to mental states among high school teachers if their symptoms do not get better after taking physical care.

Fatigue and Depression from Early Postpartum to 1 Month among Postpartum Women with Mental Disorders

Objective: This study aims to ascertain the prevalence of fatigue and depression from early postpartum to 1 month after delivery among postpartum women with mental disorders. Methods: The participants of this study were postpartum women who had delivered a child after a full-term pregnancy and were suffering from a mental disorder. We administered the Postpartum Fatigue Scale (PFS) on days 1, 3, and 4 (to multiparas), and 1, 3, and 5 (to primiparas), and 1 month after delivery to all participants. The Edinburgh Postnatal Depression Scale (EPDS), Japanese version, was also administered at the same time intervals as PFS except on day 3 after delivery. Results: A total of 7 primiparas and 9 multiparas participated in this study. The average age was 29.0 ± 7.0 years in primiparas and 32.0 ± 4.0 years in multiparas. The PFS scores were higher among the primiparas and peaked at day 1, and more than half the primiparas scored more than 9 points in EPDS. In addition, the EPDS score at 1 month had a strong correlation with the PFS subscale “mental stress situation” (r = 0.818/p = 0.047). In multiparas, the percentage of women who scored more than 9 points decreased. However, their EPDS scores at 1 month were related to the total scores of the PFS, “physical stress situation”, “mental stress situation”, and “sleep deprivation situation”. Especially, the score of “sleep deprivation situation” was higher than those during hospitalization. Conclusion: There was more fatigue 1 month after the discharge among postpartum women with mental disorders. The percentage of women whose EPDS scores were more than 9 points was high in both primiparas and multiparas. This study suggests assisting primiparas and multiparas by controlling the former’s disorder during childcare, and using family support for the latter, so that they get time to rest.

Corticospinal excitability during motor imagery is diminished by continuous repetition-induced fatigue

Application of continuous repetition of motor imagery can improve the performance of exercise tasks.However,there is a lack of more detailed neurophysiological evidence to support the formulation of clear standards for interventions using motor imagery.Moreover,identification of motor imagery intervention time is necessary because it exhibits possible central fatigue.Therefore,the purpose of this study was to elucidate the development of fatigue during continuous repetition of motor imagery through objective and subjective evaluation.The study involved two experiments.In experiment 1,14 healthy young volunteers were required to imagine grasping and lifting a 1.5-L plastic bottle using the whole hand.Each participant performed the motor imagery task 100 times under each condition with 48 hours interval between two conditions:500 mL or 1500 mL of water in the bottle during the demonstration phase.Mental fatigue and a decrease in pinch power appeared under the 1500-mL condition.There were changes in concentration ability or corticospinal excitability,as assessed by motor evoked potentials,between each set with continuous repetition of motor imagery also under the 1500-mL condition.Therefore,in experiment 2,12 healthy volunteers were required to perform the motor imagery task 200 times under the 1500-mL condition.Both concentration ability and corticospinal excitability decreased.This is the first study to show that continuous repetition of motor imagery can decrease corticospinal excitability in addition to producing mental fatigue.This study was approved by the Institutional Ethics Committee at the Nagasaki University Graduate School of Biomedical and Health Sciences(approval No.18121302)on January 30,2019.

A study of fatigue status in Chinese adolescents in an urban city, Jixi

The aim of the study was to clarify the charac-teristics of fatigue status in Chinese adolescents. 1018 adolescents (490 males, 528 females) aged 12 or 15 years in Jixi city were enrolled. Between May and September 2009, fatigue status was investigated using a questionnaire devised by ourselves, which consisted of 4 physical and 4 mental fatigue items. These questions were scored from 0 to 3 based on the frequency of an item occurring, given as the average of the past one month, and the fatigue scores were calculated. Lifestyle issues such as daily sleep duration, feeling of refreshment in the morning after wake-up, extracurricular sports activity, and breakfast intake, and a physical examination such as height, weight, and waist circumference were also investigated. Physical and mental fatigue scores were significantly higher in subjects aged 15 yrs old than in those aged 12 yrs old in both genders. These scores in females were significantly higher than those in males at the age of 15 yrs. Multivariate regression analysis showed that total (physical plus mental) fatigue scores were associated with female gender and various lifestyles such as unrefreshed wake-up feeling, poor extracurricular sports activity, and more frequent skipping of breakfast. However, body mass index and waist circumference were not associated with total fatigue scores.

青年武术散打运动员竞赛状态焦虑对心理疲劳的影响研究——以2022年第八届世界青少年武术锦标赛为例

为考察我国青年武术散打运动员在大赛过程中的竞赛状态焦虑水平以及对心理疲劳产生的影响程度,通过文献查阅,应用运动员竞赛焦虑量表和运动员心理疲劳量表,对参加2022年第八届世界青少年武术锦标赛运动员的竞赛状态焦虑及其对心理疲劳的影响进行调查分析.研究发现:(1)不同性别的运动员竞赛状态焦虑在躯体状态焦虑和状态自信心上不存在显著性差异,认知状态焦虑存在显著性差异(P<0.05);(2)不同年龄的运动员竞赛状态焦虑3个维度均不存在显著性差异;(3)不同等级的运动员竞赛状态焦虑3个维度均不存在显著性差异,但运动员各维度的焦虑水平会随着运动等级的提高而出现下降;(4)不同运动年限的运动员竞赛状态焦虑3个维度均不存在显著性差异;(5)青年武术散打运动员的认知状态焦虑和躯体状态焦虑可以正向影响心理疲劳,状态自信心可以负向影响心理疲劳,但均不存在显著性.性别因素是影响青年散打运动员竞赛状态焦虑的主要变量,不同性别之间的竞赛状态焦虑水平不尽相同,主要表现在认知状态焦虑上.青年散打运动员的竞赛状态焦虑与心理疲劳之间具有一定的相关性,主要体现在认知状态焦虑和躯体状态焦虑2个维度上.

针对性干预对肺癌化疗伴癌因性疲乏患者的影响

目的:探讨针对性干预对肺癌化疗伴癌因性疲乏患者的影响。方法:选择2021年3月—2023年3月江西省肿瘤医院胸内一病区接收的肺癌化疗伴癌因性疲乏患者80例作为研究对象,按随机数字表法将其分为对照组与观察组,各40例。对照组给予常规干预措施,观察组在对照组的基础上给予针对性干预,比较两组癌因性疲乏程度、心理状态、社会适应性、希望水平、睡眠质量、生存质量。结果:干预后观察组癌因性疲乏程度轻于对照组,差异有统计学意义(P<0.05)。干预后观察组焦虑自评量表(SAS)、抑郁自评量表(SDS)评分均低于对照组,差异均有统计学意义(P<0.05)。干预后观察组社会适应性量表的心理弹性、心理能量、人际适应性、控制倾向维度评分均高于对照组,差异均有统计学意义(P<0.05)。干预后,观察组希望水平、生存质量评分均高于对照组,睡眠质量评分低于对照组,差异均有统计学意义(P<0.05)。结论:对肺癌化疗伴癌因性疲乏患者实施针对性干预可进一步疏解负面情绪,改善癌因性疲乏症状,并增强患者的社会适应性,提高希望水平,恢复良好的睡眠质量和生存质量。

动态照明对疲劳调度员神经行为反应的影响

为探讨利用地铁调度中心照明环境辅助性支持设计来缓解调度员脑力疲劳以实现人机增效的可行性,研究了动态照明对疲劳调度员的影响效应及神经机制。基于实验室环境搭建了可见光谱人工照明实验平台并在此基础上调制了两种环境光照参数(常规照明:500 lx,4 000 K;动态照明:500 lx,4 000~12 000 K),采用单因素两水平被试内设计开展人因照明工效学实验。基于地铁调度任务分析设计了分别表征持续注意、工作记忆和执行控制认知功能的PVT、N-back和MABT-Ⅱ范式,对比分析了16名被试在不同光暴露期间的主观评估、行为绩效和脑电(electroencephalogram,EEG)指标等神经行为反应差异。结果表明,相较于常规照明,疲劳被试在动态照明下的主观感觉更警觉,情绪更积极,其持续注意、工作记忆和执行控制等认知功能得到显著改善。EEG数据揭示这种疲劳干预机制可能来源于动态光线对大脑额叶区α、θ和α-θ等低频频段活动的有效抑制。当前研究初步验证了动态照明对脑力疲劳的影响效应,为城市轨道交通照明设计和疲劳管理提供依据。

海洋食品酶解物改善精神疲劳功能性评价的综合实验设计

该文设计了以小鼠模型评价海洋食品酶解物对改善精神疲劳营养功能的创新性综合实验,以海参和牡蛎两种海洋生物资源为原料,通过酶解法制备了海参酶解物和牡蛎酶解物,测定了两种酶解物的氨基酸组成,探究了两种酶解物对皮质酮所致精神疲劳模型小鼠耐力、焦虑样行为、抑郁样行为以及神经递质水平的影响。结果表明海参酶解物和牡蛎酶解物均可显著提高精神疲劳小鼠的耐力表现,并改善焦虑样行为和抑郁情绪,其中,海参酶解物在改善焦虑样行为方面更显著,而牡蛎酶解物在改善抑郁情绪方面更显著。进一步研究发现两种酶解物通过调节神经递质水平改善精神疲劳。该综合实验结合了海洋生物资源精深加工技术、食品检验与分析、食品营养学、功能性食品等多领域实验技术,有助于提高学生的学习积极性、深化学生所学理论知识、培养其创新思维和实验技能。

表面肌电测试技术在研究生实验教学中的应用

利用表面肌电测试技术测量肌肉疲劳,开设研究型实验教学项目,让学生充分发挥主观能动性,独立设计实验方案,独立判断实验方案的合理性,以及运用基本实验技能进行实验操作和数据分析,熟练掌握表面肌电测试方法。该实验教学项目充实了兵器专业研究生的实验教学内容,能够培养学生的科学思维、创新精神和具体实验技能,为学生今后的科研和工作提供必要的实验手段。

急性咖啡因和茶氨酸补充减轻脑力疲劳对足球运动员协调和有氧表现的负面影响

目的:探讨急性咖啡因和茶氨酸补充对脑力疲劳足球运动员协调和有氧表现的影响。方法:采用随机交叉对照设计,15名男子业余足球运动员以随机、平衡的顺序进行咖啡因(咖啡因组)、茶氨酸(茶氨酸组)和安慰剂(安慰剂组)三种间隔1周洗脱期的营养补剂干预,每次补剂干预后首先参加45 min的Stroop脑力疲劳任务,随后参加协调和有氧两项运动表现测试。主要记录受试者脑力疲劳任务前后的脑力疲劳分数(VAS-MF)、动机(VAS-MO)、布鲁奈尔疲劳分数(BRUMS-F)、布鲁奈尔活力分数(BRUMSV),任务过程中的反应时(RT)、精确性(ACC)和平均心率(HR_(ave)),任务后的大脑努力程度(VAS-ME),以及运动表现测试过程中的主观疲劳度(RPE)、HR_(ave)和峰值心率(HR_(peak))等指标。主要采用重复测量方差分析对数据进行统计学分析。结果:咖啡因组Stroop任务前后的脑力疲劳分数差值(ΔVAS-MF)有低于安慰剂组的趋势(P=0.064),茶氨酸组Stroop任务前后的ΔVAS-MF与安慰剂组类似(P=0.999),咖啡因组和茶氨酸组Stroop任务过程中的RT显著快于安慰剂组(P=0.003和0.033),ACC显著高于安慰剂组(P=0.006和0.033);咖啡因组和茶氨酸组协调表现测试成绩有低于安慰剂组的趋势(P=0.096和0.078),咖啡因组有氧表现测试成绩显著好于安慰剂组[力竭时间(TTE):P=0.012;最后一级速度(V_(IFT)):P=0.007;最大摄氧量(VO_(2_(max))):P=0.008],茶氨酸组有氧表现测试成绩与安慰剂组类似(TTE:P=0.999;V_(IFT):P=0.999;VO_(2_(max)):P=0.999)。结论:急性咖啡因和茶氨酸补充均能减轻脑力疲劳对足球运动员协调表现的负面影响,急性咖啡因补充还能减轻脑力疲劳对足球运动员有氧表现的负面影响。

适用于空间站环境的脑力疲劳检测方法的研究

目的针对航天员在轨期间可能出现的脑力疲劳问题,研究一种适用于空间站环境的脑力疲劳检测方法。方法地基实验采用36h睡眠剥夺实验诱发脑力疲劳状态,采集45名受试者的脑电图(EEG)数据和问卷评分,计算与脑力疲劳相关的一系列EEG特征并运用随机森林分类器构建脑力疲劳检测方法,以区分脑力疲劳水平。结果在地基实验和天基实验的数据中均取得85%以上的平均准确率,各项评价指标趋势一致。结论基于EEG信号的脑力疲劳检测方法能够应对环境及任务的差异,在地基实验与天基实验中均展现出准确稳定的性能,未来在空间飞行环境中的应用具有一定可行性。

脑力疲劳诱导方案效果的比较

背景:竞技体育领域脑力疲劳研究的顺利开展有赖于合适的脑力疲劳诱导方案,然而目前该领域脑力疲劳方案种类较多及时间设置不一等问题的出现一定程度干扰了科研人员选择和确定合适的方案。目的:比较不同类型和时长脑力疲劳诱导方案的效果。方法:采用随机交叉对照设计,16名男性业余足球运动员以随机、平衡的顺序完成4次时长为60 min、间隔时间≥48 h STROOP任务的心理认知类方案(心理认知组)、社交媒体使用的电子暴露类方案(电子暴露组)、全身协调任务的运动类方案(运动组)和中性视频观看的对照处理方式(对照组)。测量受试者任务前的动机、脑力疲劳分数、身体疲劳分数和平均心率,任务过程中每15 min的脑力疲劳分数、大脑努力分数、身体疲劳分数和平均心率。主要采用重复测量方差分析对指标进行统计学分析。结果与结论:①心理认知、电子暴露、运动和对照组4组干预前测的脑力疲劳分数基线值无显著性差异(P=0.806);②心理认知组30,45和60 min的脑力疲劳分数均显著高于其他3组(P均<0.05);心理认知、电子暴露和运动组3组45,60 min 2个时间点的脑力疲劳分数类似(P均>0.05),但显著高于干预前、干预15 min和30 min 3个时间点(P均<0.05);③结论:心理认知类方案的脑力疲劳诱导效果优于电子暴露类和运动类方案,且45 min是能够有效诱导脑力疲劳的适宜时长。

军人心理弹性与疲劳的关系:社会支持与自我效能感的多重中介作用

目的研究军人疲劳与心理弹性、社会支持及自我效能感的关系。方法采用多维疲劳量表、心理弹性量表、一般自我效能感量表和中文版社会支持问卷对812名军人进行测试。采用Pearson相关性分析探讨变量间的关系,采用分层线性回归分析心理弹性、社会支持及自我效能感对疲劳的预测性,并通过构建结构方程模型检验社会支持、自我效能感在心理弹性与疲劳之间的中介作用。结果共回收有效问卷794份,有效率为97.78%。Pearson相关性结果分析表明军人的疲劳与心理弹性、社会支持及自我效能感均呈负相关(r=-0.646、-0.460、-0.520,均P<0.01),心理弹性与社会支持、自我效能感均呈正相关(r=0.458、0.618,均P<0.01),社会支持与自我效能感呈正相关(r=0.423,P<0.01)。分层线性回归分析结果表明心理弹性可独立预测疲劳水平(P<0.01),同时社会支持和自我效能感对疲劳的回归显著(均P<0.01),三者可解释疲劳46.6%的方差变异。结构方程模型结果表明社会支持、自我效能感在心理弹性与疲劳之间的中介作用显著(P<0.001,P=0.026),同时两者的链式中介在心理弹性与疲劳之间的也存在显著中介效应(P<0.001)。结论加强军人心理弹性水平训练,提高军人社会支持水平和军人自我效能感对增强军人疲劳应对能力、降低疲劳反应、提高作业效能具有重要意义。