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1.
Accid Anal Prev ; 161: 106387, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34492561

RESUMO

INTRODUCTION: Mental fatigue has been shown to negatively affect motor and sport performance. To date, however, no research focused on assessing the effects of mental fatigue on hazard perception in young cyclists who are highly vulnerable in traffic, especially after school. Therefore, the purpose of this study was to examine the influence of induced mental fatigue on hazard perception and anticipation in young cyclists using a novel Virtual Reality bicycle simulator. METHODS: In this randomised, counterbalanced, cross-over investigation, forty-eight young cyclists cycled through a Virtual Environment (VE) in which they were confronted with eight simple and six complex traffic situations. Simple traffic situations are considered events including only one other actor can cause a dangerous situation while complex traffic situations include multiple actors than contribute to the dangerous situation. Half of the children were mentally fatigued using the Stroop colour-word task while the other half immediately started the VR hazard perception test. On the second test occasion, one month later, the other half of the group was mentally fatigued. RESULTS: The results demonstrate that mentally fatigued cyclists fixated the relevant areas of interest (AOIs) in the simple and complex later and showed delayed response times for the complex hazards. Mental fatigue, however, did not alter the speed with which participants cycled through the virtual environment and did not change the hazard perception score. CONCLUSION: To our knowledge, this was the first study to investigate the effect of mental fatigue in young cyclists with an innovative VR hazard perception simulator. Due to increased mental fatigue, young cyclists might have experienced more episodes of fatigue-related mind-wandering and a deterioration of selective attention for the task at hand. This resulted in a less thorough visual inspection of the scene and delayed braking responses.


Assuntos
Realidade Virtual , Acidentes de Trânsito , Ciclismo , Criança , Humanos , Fadiga Mental , Negociação
2.
Aerosp Med Hum Perform ; 92(8): 627-632, 2021 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-34503615

RESUMO

AbstractBACKGROUND: Based on posturography parameters during sleep deprivation (SD), a mental fatigue index (MFI) was constructed for healthy male cadets.METHODS: There were 37 young male subjects who volunteered for two successive days of SD. Their posturography balance, profile of mood status (POMS), and heart rate variability (HRV) were measured at four different times (10:00 and 22:00 of day 1, 10:00 and 22:00 of day 2). According to the methods used in our previous research, similar MFIs based on posturography parameters were computed. Then, correlations of MFIs with POMS scores and HRV values were evaluated by linear and nonlinear methods including quadratic, S-curve, growth, and exponential analyses.RESULTS: MFI continued to increase during SD and MFI as the independent variable had quadratic relationships with fluster (R² 0.057), depression (R² 0.067), and anger (R² 0.05) scores of POMS. A linear correlation was found between MFI and the depression score (R² 0.045) and MFI correlated linearly (R² 0.029) and nonlinearly (R² 0.03) with heart rate. Similarly, MFI reflected changes in the time and frequency domain parameters of HRV, with linear (R²range: 0.0290.082) or nonlinear (R²range: 0.0300.082) relationships.DISCUSSION: The increase of MFI was linked with amplification of personal negative moods and an imbalance of autonomic nervous system activity. The findings suggest that MFI might be a potential indicator of mental fatigue and provide a method to prevent driving fatigue and human errors.Cheng S, Yang J, Su M, Sun J, Xiong K, Ma J, Hu W. Postural stability change under sleep deprivation and mental fatigue status. Aerosp Med Hum Perform. 2021; 92(8):627632.


Assuntos
Fadiga Mental , Privação do Sono , Afeto , Sistema Nervoso Autônomo , Frequência Cardíaca , Humanos , Masculino
3.
J Nurs Adm ; 51(10): 507-512, 2021 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-34519698

RESUMO

OBJECTIVE: The aims of this study were to describe nurses' self-perceptions of fatigue and to examine nurses' acceptance of specific fatigue countermeasures. BACKGROUND: The work of nurses places them at a high risk of fatigue. Evidence suggests 75% to 80% of nurses in the United States experience high levels of fatigue. METHODS: This descriptive, cross-sectional correlational study surveyed 279 nurses. RESULTS: Results suggest that almost half of nurses (46%) are not able to accurately self-assess fatigue. Nurses expressed acceptance of several workplace fatigue reduction strategies. CONCLUSIONS: It may be unrealistic to expect nurses to self-assess fatigue levels and make decisions about their ability to safely provide patient care. Reliable methods for assessing fatigue in the workplace are needed. Several strategies exist that may be used to alleviate fatigue, and many were acceptable to nurses. Nurse leaders are well positioned to implement changes that impact the occurrence of nurse fatigue and thereby the quality of patient care.


Assuntos
Liderança , Fadiga Mental/psicologia , Recursos Humanos de Enfermagem no Hospital/psicologia , Autoavaliação (Psicologia) , Local de Trabalho/psicologia , Estudos Transversais , Humanos , Satisfação no Emprego , Fadiga Mental/prevenção & controle , Estados Unidos
4.
Rev. bras. med. esporte ; 27(5): 485-489, July-Sept. 2021. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1288625

RESUMO

ABSTRACT Introduction: Regarding sports mental fatigue research, foreign countries mainly discuss the theoretical model of mental exhaustion. Among them, Silva's theoretical model believes that sports mental fatigue is a negative training stress response. Domestic research mainly analyzes and discusses the concept, causes, and monitoring of mental fatigue. Objective: This study explores the relationship between sports fatigue and mental health of elite athletes through investigation and analysis; analyzes whether social support plays a moderating role in training stress and how aspect support plays an important role. Methods: Based on the stress theory and the negative training stress response model theory, the paper used the Mental Health Inventory (PHI), Athlete Exercise Fatigue Questionnaire, Social Support Rating Scale, and Perceived Social Support Scale to analyze 163 outstanding athletes above the first level. Carry out investigation, use SPSS10.0 software to carry out reliability analysis, Pearson correlation analysis, and multiple linear stepwise regression analysis. Results: The mental health level of elite athletes is closely related to the degree of sports fatigue, and the correlation coefficients between most factors have reached a significant level. The physical (emotional) exhaustion in sports fatigue is an important predictor of the mental health of elite athletes; age, sports grade, economic conditions, perceived family support, and mental health are important predictors of sports fatigue for elite athletes; social support is an important external "buffer" in the process of training stress, in which family support and emotional support play a major regulatory role. Conclusions: The research results can provide references for maintaining and promoting athletes' physical and mental health, provide some useful references for mental health education of sports teams, and provide empirical data for sports psychology and health psychology. Level of evidence II; Therapeutic studies - investigation of treatment results.


RESUMO Introdução: Em relação à pesquisa sobre fadiga mental no esporte, os países estrangeiros discutem principalmente o modelo teórico de esgotamento mental. Entre eles, o modelo teórico de Silva acredita que a fadiga mental esportiva é uma resposta negativa ao estresse do treinamento. A pesquisa doméstica examina e discute principalmente o conceito, as causas e o monitoramento da fadiga mental. Objetivo: Este estudo explora a relação entre fadiga esportiva e saúde mental em atletas de elite por meio de pesquisa e análise; se o suporte social desempenha um papel moderador no treinamento de estresse e como os suportes de aparência desempenham um papel importante. Métodos: Com base na teoria do estresse e na teoria do modelo de resposta negativa ao estresse do treinamento, o artigo utilizou o Mental Health Inventory (PHI), o Athlete Exercise Fatigue Questionnaire, a Social Support Rating Scale e a Perceived Social Support Scale para analisar 163 atletas de destaque. Realizamos uma investigação e usamos o software SPSS10.0 para realizar a análise de confiabilidade, a análise de correlação de Pearson e a análise de regressão linear múltipla stepwise. Resultados: O nível de saúde mental de atletas de elite está intimamente relacionado ao grau de fadiga esportiva, e os coeficientes de correlação entre a maioria dos fatores atingiram um nível significativo. A exaustão física (emocional) na fadiga esportiva é um importante preditor de saúde mental em atletas de elite; idade, nível atlético, condições econômicas, apoio familiar percebido e saúde mental são importantes preditores de fadiga esportiva para atletas de elite; O suporte social é um importante "amortecedor" externo no processo de treinamento do estresse, no qual o suporte familiar e emocional desempenham um papel regulador importante. Conclusiones: Los resultados de la investigación pueden proporcionar referencias para mantener y promover la salud física y mental de los atletas, proporcionar algunas referencias útiles para la educación en salud mental de los equipos deportivos y proporcionar datos empíricos para la psicología del deporte y la psicología de a saúde. Nível de evidência II; Estudos terapêuticos: investigação dos resultados do tratamento.


RESUMEN Introducción: En cuanto a la investigación sobre la fatiga mental deportiva, los países extranjeros discuten principalmente el modelo teórico del agotamiento mental. Entre ellos, el modelo teórico de Silva cree que la fatiga mental deportiva es una respuesta negativa al estrés del entrenamiento. La investigación doméstica examina y discute principalmente el concepto, las causas y el seguimiento de la fatiga mental. Objetivo: Este estudio explora la relación entre la fatiga deportiva y la salud mental de los deportistas de élite a través de la investigación y el análisis; si el apoyo social juega un papel moderador en el entrenamiento del estrés y cómo los apoyos de aspecto juegan un papel importante. Métodos: Basado en la teoría del estrés y la teoría del modelo de respuesta negativa al estrés del entrenamiento, el documento utilizó el Inventario de Salud Mental (PHI), el Cuestionario de Fatiga del Ejercicio del Atleta, la Escala de Calificación de Apoyo Social y la Escala de Apoyo Social Percibido para analizar 163 atletas destacados. Realizamos una investigación, y utilizamos el software SPSS10.0 para realizar análisis de confiabilidad, análisis de correlación de Pearson y análisis de regresión lineal múltiple por pasos. Resultados: El nivel de salud mental de los deportistas de élite está estrechamente relacionado con el grado de fatiga deportiva, y los coeficientes de correlación entre la mayoría de factores han alcanzado un nivel significativo. El agotamiento físico (emocional) en la fatiga deportiva es un importante predictor de la salud mental de los deportistas de élite; la edad, el nivel deportivo, las condiciones económicas, el apoyo familiar percibido y la salud mental son predictores importantes de la fatiga deportiva para los atletas de élite; El apoyo social es un importante "amortiguador" externo en el proceso de entrenamiento del estrés, en el que el apoyo familiar y el apoyo emocional juegan un papel regulador importante. Conclusiones: Los resultados de la investigación pueden proporcionar referencias para mantener y promover la salud física y mental de los atletas, proporcionar algunas referencias útiles para la educación en salud mental de los equipos deportivos y proporcionar datos empíricos para la psicología del deporte y la psicología de la salud. Nivel de evidencia II; Estudios terapéuticos: investigación de los resultados del tratamiento.


Assuntos
Humanos , Masculino , Feminino , Adulto Jovem , Estresse Psicológico , Saúde Mental , Fadiga Mental/psicologia , Atletas/psicologia , Inquéritos e Questionários
5.
Percept Mot Skills ; 128(5): 2398-2414, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34340632

RESUMO

This study investigated the impact of mental fatigue and self-controlled versus yoked feedback on learning a force production task. We randomly assigned 44 non-athlete male students (Mage = 21.4, SD = 1.4 years) to four groups; (a) MF&SCF = mental fatigue & self-controlled feedback, (b) MF&Y = mental fatigue & yoked, (c) NMF&SCF = no mental fatigue & self-controlled feedback, and (d) NMF&Y = no mental fatigue & yoked). SCF group participants were provided feedback whenever they requested it, while YK group participants received feedback according to a schedule created by their SCF counterparts. To induce mental fatigue, participants performed a Stroop color-word task for one hour. During the acquisition (practice) phase, participants were asked to produce a given percentage of their maximum force (20%) in 12 blocks of six trials. We recorded the participants' absolute error at the end of the acquisition phase, the immediate retention test, the first transfer test, and the second transfer test (after 24 hours and without any further mental fatigue). The acquisition phase data were analyzed in a 2 (feedback) × 2 (mental fatigue) × 12 (block) ANOVA with repeated measures on the last factor, while the retention and transfer data were analyzed in 2 (feedback) × 2 (mental fatigue) ANOVAs. We found that all four groups made significant progress during practice (p < .001), but there were no significant group differences during this phase (p>.05). There was a significant interaction effect of self-controlled feedback and mental fatigue at retention (p = .018) and transfer testing (p < .001). In the mental fatigue condition, participants in the self-controlled group had poorer learning compared to participants in the yoked group; but when not mentally fatigued, participants in the self-controlled group had better learning than those in the yoked group. These findings suggest that mental fatigue reduces typical advantages of self-controlled feedback in motor learning.


Assuntos
Aprendizagem , Destreza Motora , Retroalimentação , Retroalimentação Psicológica , Humanos , Masculino , Fadiga Mental
6.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi ; 38(4): 671-677, 2021 Aug 25.
Artigo em Chinês | MEDLINE | ID: mdl-34459166

RESUMO

Mental fatigue is the subjective state of people after excessive consumption of information resources. Its impact on cognitive activities is mainly manifested as decreased alertness, poor memory and inattention, which is highly related to the performance after impaired working memory. In this paper, the partial directional coherence method was used to calculate the coherence coefficient of scalp electroencephalogram (EEG) of each electrode. The analysis of brain network and its attribute parameters was used to explore the changes of information resource allocation of working memory under mental fatigue. Mental fatigue was quickly induced by the experimental paradigm of adaptive N-back working memory. Twenty-five healthy college students were randomly recruited as subjects, including 14 males and 11 females, aged from 20 to 27 years old, all right-handed. The behavioral data and resting scalp EEG data were collected simultaneously. The results showed that the main information transmission pathway of the brain changed under mental fatigue, mainly in the frontal lobe and parietal lobe. The significant changes in brain network parameters indicated that the information transmission path of the brain decreased and the efficiency of information transmission decreased significantly. In the causal flow of each electrode and the information flow of each brain region, the inflow of information resources in the frontal lobe decreased under mental fatigue. Although the parietal lobe region and occipital lobe region became the main functional connection areas in the fatigue state, the inflow of information resources in these two regions was still reduced as a whole. These results indicated that mental fatigue affected the information resources allocation of working memory, especially in the frontal and parietal regions which were closely related to working memory.


Assuntos
Memória de Curto Prazo , Fadiga Mental , Adulto , Idoso , Encéfalo , Feminino , Lobo Frontal , Humanos , Masculino , Alocação de Recursos , Adulto Jovem
7.
Med Biol Eng Comput ; 59(9): 1691-1707, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34216320

RESUMO

Stress and mental fatigue are in existence constantly in daily life, and decrease our productivity while performing our daily routines. The purpose of this study was to analyze the states of stress and mental fatigue using data fusion while e-sport activity. In the study, ten volunteers performed e-sport duty which required both physical and mental effort and skills for 2 min. Volunteers' electroencephalogram (EEG), galvanic skin response (GSR), heart rate variability (HRV), and eye tracking data were obtained before and during game and then were analyzed. In addition, the effects of e-sports were evaluated with visual analogue scale and d2 attention tests. The d2 tests are performed after the game, and the game has a positive effect on attention and concentration. EEG from the frontal region indicates that the game is partly caused by stress and mental fatigue. HRV analysis showed that the sympathetic and vagal activities created by e-sports on people are different. By evaluating HRV and GSR together, it was seen that the emotional processes of the participants were stressed in some and excited in others. Data fusion can serve a variety of purposes such as determining the effect of e-sports activity on the person and the appropriate game type.


Assuntos
Fadiga Mental , Esportes , Eletroencefalografia , Eletrônica , Resposta Galvânica da Pele , Frequência Cardíaca , Humanos
8.
Nutrients ; 13(6)2021 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-34201370

RESUMO

Phenylalanine and serine are amino acids used in dietary supplements and nutritional products consumed by healthy consumers; however, the safe level of phenylalanine or serine supplementation is unknown. The objective of this study was to conduct two 4-week clinical trials to evaluate the safety and tolerability of graded dosages of oral phenylalanine and oral serine. Healthy male adults (n = 60, 38.2 ± 1.8y) completed graded dosages of either phenylalanine or serine supplement (3, 6, 9 and 12 g/d) for 4 weeks with 2-week wash-out periods in between. Primary outcomes included vitals, a broad spectrum of circulating biochemical analytes, body weight, sleep quality and mental self-assessment. At low dosages, minor changes in serum electrolytes and plasma non-essential amino acids glutamine and aspartic acid concentrations were observed. Serine increased its plasma concentrations at high supplemental dosages (9 and 12 g/day), and phenylalanine increased plasma tyrosine concentrations at 12 g/day, but those changes were not considered toxicologically relevant. No other changes in measured parameters were observed, and study subjects tolerated 4-week-long oral supplementation of phenylalanine or serine without treatment-related adverse events. A clinical, no-observed-adverse-effect-level (NOAEL) of phenylalanine and serine supplementation in healthy adult males was determined to be 12 g/day.


Assuntos
Suplementos Nutricionais , Saúde , Fenilalanina/administração & dosagem , Serina/administração & dosagem , Administração Oral , Adulto , Peso Corporal , Ingestão de Energia , Feminino , Humanos , Masculino , Fadiga Mental/sangue , Nutrientes/análise , Fenilalanina/sangue , Serina/sangue , Sono
9.
Artigo em Inglês | MEDLINE | ID: mdl-34202762

RESUMO

Mental fatigue can impart negative effects on subsequent physical performance, although the mechanisms underlying these effects are not well understood. This study examined whether mental fatigue confers negative carryover effects on the performance of a set of biceps curls, while also investigating physiological and psychological mechanisms proposed to explain the predicted effect. A randomized, cross-over design was employed. On visit 1, participants (N = 10) performed a barbell biceps curl one-repetition maximum (1RM) test. On visits 2-3, participants performed 20 biceps curls at 50% of their 1RM, followed by their respective 10 min experimental manipulation (high vs. low cognitive exertion) and then a second set of biceps curls to exhaustion. Ratings of perceived exertion and electromyography of the biceps brachii, triceps brachii, upper trapezius, thoracic erector spinae and lumbar erector spinae were recorded during the physical task. The total number of repetitions completed was similar across the conditions. Results also failed to show between-condition differences for muscle activation and perceptions of exertion. Future research is needed to build an adequate knowledge base to determine whether there is an effect of mental fatigue on dynamic resistance-based task performance and, if so, identify the mechanisms explaining how and why.


Assuntos
Treinamento de Força , Eletromiografia , Exercício Físico , Humanos , Fadiga Mental , Músculo Esquelético , Esforço Físico
10.
Artigo em Inglês | MEDLINE | ID: mdl-34199339

RESUMO

Most people recover within months after a mild traumatic brain injury (TBI) or concussion, but some will suffer from long-term fatigue with a reduced quality of life and the inability to maintain their employment status or education. For many people, mental fatigue is one of the most distressing and long-lasting symptoms following an mTBI. No efficient treatment options can be offered. The best method for measuring fatigue today is with fatigue self-assessment scales, there being no objective clinical tests available for mental fatigue. The aim here is to provide a narrative review and identify fatigue in relation to cognitive tests and brain imaging methods. Suggestions for future research are presented.


Assuntos
Concussão Encefálica , Concussão Encefálica/complicações , Concussão Encefálica/diagnóstico , Humanos , Fadiga Mental/diagnóstico , Fadiga Mental/etiologia , Neuroimagem , Testes Neuropsicológicos , Qualidade de Vida
11.
Exp Brain Res ; 239(7): 2273-2283, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34080036

RESUMO

This study investigated the effects of mental fatigue (MF) induced by a 90-min AX-continuous performance test (AX-CPT) on balance control by addressing the issue of the heterogeneity of individuals' responses. Twenty healthy young active participants were recruited. They had to carry out two balance tasks (sway as little as possible on a stable support with the eyes open and closed) when standing on a force platform before and after performing a 90-min AX-CPT. The NASA-TLX test was used to assess the subjective manifestations of MF. Objective cognitive performance was measured using results from the AX-CPT. Inter-individual differences in behavioral deterioration due to MF were analyzed with a hierarchical cluster analysis, which categorizes participants' behaviors into subgroups with similar characteristics. The cluster analysis revealed that the achievement of the AX-CPT induced various levels of MF and balance impairments within the whole sample. A significant relationship between the level of MF and the degree of balance disturbance was observed only when participants stood with the eyes open, thus suggesting that inter-individual differences in vulnerability to MF could stem from differences between subjects in the level of engagement of visual attention and/or from differences in field dependency for balance control. These findings show that the completion of the same prolonged demanding cognitive task induces a strong heterogeneity in subjects' responses, with marked individual differences in MF vulnerability that affect balance control differently according to the sensory context.


Assuntos
Fadiga Mental , Fadiga Muscular , Cognição , Humanos , Testes Neuropsicológicos , Equilíbrio Postural , Posição Ortostática
12.
Percept Mot Skills ; 128(4): 1640-1659, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34000894

RESUMO

We investigated the acute effects of mental fatigue induced by 30-minute use of smartphone social network apps on volume load in resistance training among recreationally trained adults. Sixteen (n = 16) adults of both sexes performed three sets of a half back-squat exercise to failure with 80% of 15RM, interspersed with 3-minutes of passive recovery between sets, before and after two different cognitive tasks: (a) use of smartphone social network apps; and (b) watching a documentary. We assessed mechanical variables and ratings of perceived exertion during the strength exercise. Relative to the documentary-viewing control condition, a 30-minute exposure to smartphone social network apps led participants toward increased perception of mental fatigue (p = 0.004) and lower volume-load during the strength exercise (p = 0.006). There were no significant differences in perceived exertion between conditions (p = 0.54), participants' motivation (p = 0.277), intra-set mechanical variables (p > 0.05), or blood lactate concentrations (p = 0.36). Our findings of an isolated possible higher-than normal RPE without changes in physiological variables, accompanying the lower volume-load in the mentally-fatigued participants support psychological, rather than physiological, bases for mental fatigue effects.


Assuntos
Treinamento de Força , Adulto , Estudos Cross-Over , Exercício Físico , Feminino , Humanos , Masculino , Fadiga Mental , Esforço Físico , Smartphone
13.
Int J Sports Med ; 42(9): 782-788, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33862638

RESUMO

Monitoring the physical load undertaken by athletes and examining the subsequent relationship with performance and injury and illness risk is common practice in high performance sport. Less attention has been paid to the psychological factors contributing to the overall load experienced and the impact upon health status and performance. This paper discusses considerations for the conceptualization and measurement of psychological load in sport. First, we outline the importance of ensuring conceptual clarity is adopted in the measurement of psychological load. Next, we discuss the challenges to measuring psychological load in a comparable manner to which physical load is currently evaluated, including use of subjective assessment, adoption of specific and global approaches, and development of measurement instrumentation, techniques, and expertise. We then offer recommendations for practitioners when undertaking assessment of psychological load in sport. We conclude with future research directions to advance the study and measurement of the construct, including the interaction between psychological and physical load, the appraisal of the load faced, and personal and social resources available to successfully cope. We also highlight the need to consider groups of athletes (e. g., transitioning athlete, long-term injured) at greater risk from threats to mental and physical health from increased psychological load.


Assuntos
Atletas/psicologia , Esportes/psicologia , Cognição , Humanos , Fadiga Mental
14.
World Neurosurg ; 151: e122-e127, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33831611

RESUMO

OBJECTIVE: Long-term data on neurological and radiological outcome after aneurysmal subarachnoid hemorrhage (aSAH) are scarce. The aim of this study was to report neurological and radiological outcome >15 years after aSAH. METHODS: Patients with aSAH who were randomly assigned to endovascular treatment (EVT) or microsurgical treatment (MST) during 1997-2001 were included. Main end points were neurological outcome assessed by modified Rankin Scale, fatigue assessed by mental fatigue scale, and radiological outcome assessed by magnetic resonance angiography. Results for mental fatigue scale were compared with a control group. RESULTS: After 15-21 years, 46 (62.2%) of the 74 survivors replied to a questionnaire. Of these patients, 18 received MST, and 28 received EVT. Modified Rankin Scale score of 0-2 was found in 100% of patients in the EVT group and 88.8% of patients in the MST group. Moderate or severe mental fatigue was found in 7/28 patients (25%) in the EVT group and 7/18 patients (38.8%) in the MST group (P < 0.05), whereas moderate or severe mental fatigue was observed in 3/34 patients (8.9%) in the control group. Magnetic resonance angiography was performed in 29 patients. In the EVT group, new neck remnants were found in 2/16 patients (12.5%), and de novo aneurysm was found in 2/16 patients (12.5%). In the MST group, de novo aneurysm was found in 1/13 patients (7.7%). CONCLUSIONS: Neurological outcome at long-term follow-up after aSAH was good; however, mental fatigue was overrepresented in patients compared with healthy control subjects regardless of treatment modality. Residual or de novo aneurysm was found in 17% of patients warranting radiological long-term follow-up.


Assuntos
Revascularização Cerebral/métodos , Procedimentos Endovasculares/métodos , Fadiga Mental/etiologia , Procedimentos Neurocirúrgicos/métodos , Hemorragia Subaracnóidea/psicologia , Hemorragia Subaracnóidea/cirurgia , Idoso , Determinação de Ponto Final , Feminino , Seguimentos , Humanos , Incidência , Angiografia por Ressonância Magnética , Imageamento por Ressonância Magnética , Masculino , Fadiga Mental/diagnóstico por imagem , Fadiga Mental/epidemiologia , Pessoa de Meia-Idade , Recidiva , Hemorragia Subaracnóidea/diagnóstico por imagem , Resultado do Tratamento
15.
Artigo em Inglês | MEDLINE | ID: mdl-33921701

RESUMO

This study aimed to analyze the effects of rules limitations in pass decisions during soccer tasks on physical and mental load reported by players. Participants were 40 semiprofessional Spanish soccer players (Mage = 22.40, SD = 2.25) from two male teams. Two training sessions with four tasks (same tasks with different score system: two maintaining ball possession games with goalkeepers, and two maintaining ball possession games) in counterbalanced order between teams were completed. To achieve a goal during limitation tasks, a minimum number of players had to participate in the passes before the goal. Internal (perceived effort and heart rate) and external physical load (distances), mental load (validated adaptation of the NASA-TXL) and fatigue (VASfatigue) were quantified. Paired t-test and magnitude-based inference were conducted. The results showed significantly higher mean speeds (p < 0.01), effort perception (p < 0.001), and mental fatigue (very likely positive) during possession games with restrictions. Additionally, performance satisfaction obtained significantly higher values with goalkeepers and pass restrictions (very likely positive). External physical load showed no significant differences between situations. The influence of mental fatigue on internal load and the complexity of the tasks could explain these results. Coaches can use this information to manipulate the training load in ecological conditions.


Assuntos
Desempenho Atlético , Futebol , Adulto , Frequência Cardíaca , Humanos , Masculino , Fadiga Mental , Projetos Piloto , Adulto Jovem
16.
Nursing ; 51(5): 59-63, 2021 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-33885434

RESUMO

PURPOSE: Alarm fatigue among working nurses is a well-documented, high-priority safety issue. This article describes a study to learn whether alarm fatigue develops in undergraduate nursing student populations. METHODS: This longitudinal quantitative study employed survey data from a single cohort of nursing students in the Southeastern US over a period of 18 months to assess nursing students' level of sensitivity to alarms, including the call bell, bathroom, fall and safety, I.V. infusion pumps, and telemetry alarms. RESULTS: These data were significant for I.V. infusion pump alarms and indicated a general decrease in sensitivity over an 18-month period. Nursing students with previous healthcare experience also noted decreased sensitivity to bathroom call bells and fall and safety alarms. CONCLUSION: Alarm fatigue was recognized among the surveyed nursing students. Nurse educators also identified a performance-based strategy to increase student awareness of alarm fatigue and evidence-based strategies to minimize desensitization to alarms in both education and practice.


Assuntos
Alarmes Clínicos , Fadiga Mental/epidemiologia , Estudantes de Enfermagem/psicologia , Bacharelado em Enfermagem , Humanos , Estudos Longitudinais , Pesquisa em Educação de Enfermagem , Escolas de Enfermagem , Sudeste dos Estados Unidos/epidemiologia , Inquéritos e Questionários
18.
J Sports Sci ; 39(15): 1687-1699, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33678152

RESUMO

This study investigated the individual and combined effects of mental fatigue (MF) and hypoxia (HYP) on physical and cognitive performance. Fifteen males (24 ± 3 years) completed one familiarization session and six experimental trials, including: 1) normoxia (0.209 FiO2) and no MF; 2) normoxia (0.209 FiO2) with MF; 3) mild normobaric HYP (0.13 FiO2) and no MF; 4) mild normobaric HYP (0.13 FiO2) with MF; 5) severe normobaric HYP (0.10 FiO2) and no MF; 6) severe normobaric HYP (0.10 FiO2) with MF. Each condition included a 15-min self-paced time trial, followed by a 60-s isometric maximal voluntary contraction of the biceps brachii. MF was induced using a 16-min individualized cognitive test prior to exercise performance. Following each time trial, participants performed the Tower of Hanoi cognitive test. A main effect of HYP was observed on average power output, oxygen consumption and muscle oxygenation (P ≤ 0.004), with no effect of MF (P ≥ 0.599). Voluntary activation of the biceps brachii was also reduced in HYP (68.42 ± 5.64%, P = 0.039). No effect of MF or HYP was observed on cognitive performance (P ≥ 0.138). HYP impacted physical performance, whilst MF had no effect on self-paced physical or cognitive performance.


Assuntos
Cognição/fisiologia , Exercício Físico/fisiologia , Exercício Físico/psicologia , Hipóxia/fisiopatologia , Fadiga Mental/fisiopatologia , Adulto , Afeto , Altitude , Tédio , Teste de Esforço/métodos , Humanos , Masculino , Motivação , Contração Muscular , Fadiga Muscular/fisiologia , Músculo Esquelético/metabolismo , Músculo Esquelético/fisiologia , Consumo de Oxigênio , Autorrelato , Sonolência , Adulto Jovem
19.
Eur J Pain ; 25(7): 1508-1524, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-33721359

RESUMO

BACKGROUND: The nociceptive flexion reflex (NFR) is a spinally-mediated withdrawal reflex occurring in response to noxious stimuli and is used as an electrophysiological marker of spinal nociception. Although it is well-documented that the NFR is subject to powerful modulation of several personal factors, the effects of experimentally induced fatigue on the NFR have not yet been examined. Hence, this study aimed to characterize if and how fatigue affects spinal nociception in healthy adults. METHODS: The NFR of 58 healthy people was measured prior to and following rest and two fatiguing tasks performed in randomized order. The NFR was elicited by transcutaneous electrical stimulation of the sural nerve and objectified by electromyographic recordings from the biceps femoris muscle. An isokinetic fatiguing protocol was used to induce localized muscle fatigue of the hamstrings. The modified incongruent Stroop-word task was used to provoke mental fatigue. A linear mixed model analysis was performed to assess the influence of fatigue on the NFR. RESULTS: Low-to-moderate levels experimentally induced localized muscle and mental fatigue did not affect the NFR in healthy adults. These results suggest that descending pain inhibitory processes to dampen spinal nociception are resistant to the effects of localized muscle and mental fatigue. CONCLUSIONS: The relative robustness of the NFR to fatigue may be beneficial in both clinical and research settings where the influence of confounders complicates interpretation. Furthermore, the findings possibly help enhance our understanding on why even demanding cognitive/physical exercise-based treatment programs form effective treatment strategies for patients with chronic pain. SIGNIFICANCE: The present study unraveled that low-to-moderate levels experimentally induced localized muscle and mental fatigue did not affect the NFR. These results suggest that descending pain inhibitory processes to dampen spinal nociception are resistant to the effects of localized muscle and mental fatigue. This relative robustness of the NFR may be beneficial in a clinical setting in which the evaluation of spinal nociception that is unaffected by clinical symptoms of fatigue may be useful (e.g. chronic fatigue syndrome, cancer-related fatigue, etc.).


Assuntos
Dor Crônica , Nociceptividade , Adulto , Estudos Cross-Over , Estimulação Elétrica , Humanos , Fadiga Mental , Medição da Dor , Limiar da Dor , Reflexo
20.
Sports Med ; 51(7): 1527-1548, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33710524

RESUMO

BACKGROUND: Mental fatigue (MF) is a psychobiological state that impairs endurance performance in healthy athletes. Recently, multiple studies indicated that MF could also impair sport-specific psychomotor performance (SSPP). Nevertheless, a systematic overview detailing the effects of MF on SSPP is currently lacking. OBJECTIVE: The objective of this study is to collate relevant literature and examine the effect of MF on SSPP. A secondary aim was to create an overview of the potential subjective and physiological factors underlying this MF effect. METHODS: PubMed (MEDLINE), Web of Science, PsycINFO and SPORTDiscus were searched (5th of November 2020). Studies were eligible when study outcomes encompassed any form of SSPP skill in a sport-specific context, the intervention was targeted to induce MF, and the population included healthy individuals. The presence of a manipulation check, to indicate the successful induction of MF, was obligatory for inclusion. Secondary outcomes were all outcomes (either physiological or psychological) that could explain the underlying mechanisms of the effect of MF on SSPP. RESULTS: In total, 21 papers were included. MF was successfully induced in all but two studies, which were excluded from further analysis. MF negatively impacts a myriad of SSPP outcomes, including decision-making, reaction time and accuracy outcomes. No changes in physiological outcomes, that could underlie the effect of MF, were reported. Subjectively, only ratings of perceived of exertion increased due to MF in some studies. CONCLUSIONS: Overall, the selected papers indicated that MF negatively affects SSPP. Research that assesses brain function, while evaluating the effect of MF on SSPP is essential to create further insight.


Assuntos
Fadiga Mental , Esportes , Atletas , Cognição , Humanos , Desempenho Psicomotor
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