scholarly journals Mental Fatigue-Associated Decrease in Table Tennis Performance: Is There an Electrophysiological Signature?

2021 ◽  
Vol 18 (24) ◽  
pp. 12906
Author(s):  
Jelle Habay ◽  
Matthias Proost ◽  
Jonas De Wachter ◽  
Jesús Díaz-García ◽  
Kevin De Pauw ◽  
...  
Keyword(s):  
Reaction Time ◽  
Human Performance ◽  
Spectral Power ◽  
Flanker Task ◽  
Performance Outcomes ◽  
Mental Fatigue ◽  
Subjective Feeling ◽  
Table Tennis ◽  
Behavioral Indicators ◽  
Visuomotor Task

Mental fatigue (MF) is a psychobiological state negatively impacting both cognitive and physical performance. Although recent research implies that some table tennis (TT) performance outcomes are impaired by MF, open skill sports such as TT require a more detailed overview of MF-related performance decrements. Moreover, research into MF and sport-specific psychomotor performance lacks the inclusion of brain-related measurements to identify MF mechanisms. Eleven experienced TT players participated in this randomized counterbalanced crossover trial. Participants were either required to perform an individualized Stroop task (MF condition) or watch a documentary (control condition). The primary outcomes were reaction time on a sport-specific visuomotor task and EEG activity throughout the trial. The subjective feeling of MF was significantly different between both conditions and confirmed that the MF condition induced the mentally fatigue state of participants (p < 0.001), though no behavioral indicators (i.e., decrease in performance on Stroop and flanker task) of MF. MF worsened reaction time on the visuomotor task, while other secondary measurements remained largely ambiguous. Spectral power (i.e., decreases in upper α band and θ band) was influenced by MF, while ERPs measured during the visuomotor task remained unaltered. The present study confirms that MF negatively impacts table tennis performance, specifically inhibitory stimuli during the visuomotor task. These findings also further augment our understanding of the effects of MF on human performance.

The social value of Participatory Ergonomics from a practitioner’s perspective

2020 ◽  
Vol 64 (1) ◽  
pp. 919-923
Author(s):  
Kátia M. Costa-Black ◽  
Chris Arteberry
Keyword(s):  
Human Performance ◽  
Well Being ◽  
Participatory Approach ◽  
Performance Outcomes ◽  
Participatory Ergonomics ◽  
Worker Health ◽  
Healthy Working ◽  
The Social ◽  
Health And Well Being ◽  
Total Worker Health

Ergonomics applies a set of ambitious frameworks and robust body of evidence for integrating different practices to optimize worker health and well-being. One recognized framework is the participatory approach, which delves into sociotechnical workplace actions – developed from the ground up – to achieve improved human performance outcomes and acceptability across the organization. Much of what is known about the value of participatory ergonomics centers on return-on-investment analyses related to injury prevention. Outside this spectrum, little has been discussed. This paper imparts how a participatory approach can lead to various positive impacts beyond financial gains, mainly by focusing on continuous improvements at the management systems level and on proactively motivating people and organizations to embrace healthy working conditions and behaviors. Issues such as the social-ethical value of involving workers in work design and return-to-work solutions are discussed to illustrate the holistic value of participatory ergonomics in the context of Total Worker Health.

scholarly journals Evaluation of the Effect of Time Change in Cognitive Function in Volunteers in Tehran

2016 ◽  
Vol 9 (2) ◽  
pp. 119 ◽  
Author(s):  
Marjan Erfani ◽  
Hedayat Sahraei ◽  
Zahra Bahari ◽  
Gholam Hossein Meftahi ◽  
Boshra Hatef ◽  
...  
Keyword(s):  
Mental Health ◽  
Reaction Time ◽  
Cognitive Functions ◽  
Reduction Reaction ◽  
Plasma Cortisol Level ◽  
Mental Fatigue ◽  
Time Change ◽  
General Mental Health ◽  
Before And After ◽  
Time Changes

<strong></strong><p><strong>BACKGROUND:</strong> Time change (which can lead to sleep duration decrements) can lead to brain dysfunction if repeated. In the present study, cognitive functions of the volunteers were evaluated before and after the time changes in Tehran.</p><p><strong>METHODS:</strong> Eleven, voluntary healthy persons (21±2 year old) were evaluated for their cognitive functions including sustain attention, reaction time, and mental fatigue twenty-one days before the time changes and thirty-eight days after time change using PASAT software. In addition, plasma cortisol level was measured before and after the time changes.</p><p><strong>RESULTS:</strong> After the time changes salivary cortisol concentration increase, but general mental health was decreased. Sustain attention was shortened after time change which was significantly different compared with before the time changes. Reaction time was increased after the time changes in comparison with the before the time changes, but was not statistically significant. In addition, mental fatigue was increased after the time changes.</p><p><strong>CONCLUSION:</strong> It seems that time change may reduce brain cognitive functions which are manifested by general mental health, sustain attention reduction, reaction time as well as mental fatigue.</p>

scholarly journals DETERMINATION OF FEMALE TABLE TENNIS SPORT PERFORMANCE BY SENZOR MOTORIC REACTION TIME

GYMNASIUM ◽  
2017 ◽  
Vol XVII (2) ◽  
Author(s):  
Henrieta Hornigova ◽  
Ladislava Dolezajova ◽  
Jaromir Sedlacek ◽  
Peter Sagat ◽  
Gheorghe Balint
Keyword(s):  
Reaction Time ◽  
Lower Extremities ◽  
Sport Performance ◽  
Table Tennis ◽  
Motor Reaction ◽  
Significance Level ◽  
Tennis Players ◽  
Motor Reaction Time ◽  
Left Handed ◽  
Significant Difference

In the sport performance structure of table tennis is sensor motor reaction time one of the most important factors for reaching top-level results, both in males and females groups. In this research we watched 23 female table tennis players from Slovakia; 9 mini cadets (12-13 years), 6 cadets (14-15 years) and 8 juniors (16-18 years). Girls were tested by modified agility test for table tennis players (Vacenovsky & Vencurik, 2013) with machine FITRO Agility check. Thus we gained their sensor motor reaction times. By Mann-Whitney U-test we studied differences between age categories, upper and lower extremities, dominant (forehand) and un-dominant (backhand) side, right and left-handed players. We used significance level p<0.05. In our research we did not confirm expected results that the older groups have shorter sensor motor reaction time. We also expected shorter reaction time of upper extremities comparing lower extremities; this was confirmed, though there was found statistical significant difference only in juniors group. Groups of mini-cadets and cadets have better (shorter) sensor motor reaction time from backhand side, while group of junior is better from forehand side. We also confirmed that left-handed players have slightly shorter reaction time.

Predicting Human Performance IV: Choice Reaction Time

1972 ◽  
Author(s):  
Warren H. Teichner ◽  
Marjorie J. Krebs
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Human Performance

scholarly journals Independent and interactive effects of thermal stress and mental fatigue on manual dexterity

2020 ◽  
Vol 319 (6) ◽  
pp. R703-R711
Author(s):  
Alessandro Valenza ◽  
Harry Charlier ◽  
Antonino Bianco ◽  
Davide Filingeri
Keyword(s):  
Thermal Stress ◽  
Reaction Time ◽  
Interactive Effect ◽  
Thermal Conditions ◽  
Mental Fatigue ◽  
Manual Dexterity ◽  
Interactive Effects ◽  
Manual Task ◽  
Air Temperatures ◽  
Manual Tasks

Many occupations and sports require high levels of manual dexterity under thermal stress and mental fatigue. Yet, multistressor studies remain scarce. We quantified the interactive effects of thermal stress and mental fatigue on manual dexterity. Seven males (21.1 ± 1.3 yr) underwent six separate 60-min trials characterized by a combination of three air temperatures (hot, 37°C; neutral, 21°C; cold, 7°C) and two mental fatigue states (MF, mental fatigue induced by a 35-min cognitive battery; no-MF, no mental fatigue). Participants performed complex (O’Connor test) and simple (hand-tool test) manual tasks pre- and posttrial to determine stressor-induced performance changes. We monitored participants’ rectal temperature and hand skin temperature (Thand) continuously and assessed the reaction time (hand-click test) and subjective mental fatigue (5-point scale). Thermal stress ( P < 0.0001), but not mental fatigue ( P = 0.290), modulated Thand (heat, +3.3°C [95% CI: +0.2, +6.5]; cold, −7.5°C [−10.7, −4.4]). Mental fatigue ( P = 0.021), but not thermal stress ( P = 0.646), slowed the reaction time (∼10%) and increased subjective fatigue. Thermal stress and mental fatigue had an interactive effect on the complex manual task ( P = 0.040), with cold-no-MF decreasing the performance by −22% [−39, −5], whereas neutral-MF, cold-MF, and heat-MF by −36% [−53, −19], −34% [−52, −17], and −36% [−53, −19], respectively. Only mental fatigue decreased the performance in the simple manual task (−30% [−43, −16] across all thermal conditions; P = 0.002). Cold stress-induced impairments in complex manipulation increase with mental fatigue; yet combined stressors’ effects are no greater than those of mental fatigue alone, which also impairs simple manipulation. Mental fatigue poses a greater challenge to manual dexterity than thermal stress.

scholarly journals Face Detection: Mapping Human Performance

Perception ◽  
10.1068/p5007 ◽  
2003 ◽  
Vol 32 (8) ◽  
pp. 903-920 ◽  
Author(s):  
Michael B Lewis ◽  
Andrew J Edmonds
Keyword(s):  
Reaction Time ◽  
Face Detection ◽  
Human Performance ◽  
Limited Attention ◽  
Focused Attention ◽  
Deformable Template ◽  
Detection Systems ◽  
Face Experiment ◽  
Extensive Body ◽  
Inversion Effects

The recognition of faces has been the focus of an extensive body of research, whereas the preliminary and prerequisite task of detecting a face has received limited attention from psychologists. Four experiments are reported that address the question how we detect a face. Experiment 1 reveals that we use information from the scene to aid detection. In experiment 2 we investigated which features of a face speed the detection of faces. Experiment 3 revealed inversion effects and an interaction between the effects of blurring and reduction of contrast. In experiment 4 the sizes of effects of reversal of orientation, luminance, and hue were compared. Luminance was found to have the greatest effect on reaction time to detect faces. The results are interpreted as suggesting that face detection proceeds by a pre-attentive stage that identifies possible face regions, which is followed by a focused-attention stage that employs a deformable template. Comparisons are drawn with automatic face-detection systems.

Sign in / Sign up

Export Citation Format

Share Document