Exertion-Dependent Effects of Physical and Mental Workload on Physiological Outcomes and Task Performance

Mehta, Ranjana K.; Agnew, Michael J.

doi:10.1080/21577323.2011.632488

Cited by 24 publications

(15 citation statements)

References 46 publications

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“…Moreover, previous studies that have investigated the impact of cognitive fatigue on muscle capacity have focused on postural (shoulder) and lower extremity (quadriceps) muscles rather than smaller muscle groups employed during handgrip exercises. Thus it is likely that the impact of cognitive fatigue on neuromuscular capacity is task-and muscle-dependent, as previously reported by Mehta et al (2013). Since endurance time was not affected by cognitive fatigue for either age group, neuromuscular fatigue development (i.e., force fluctuations, EMG RMS, and EMG mF) was comparable across both conditions and age groups.…”

Section: Discussionsupporting

confidence: 49%

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

Shortz

Mehta

2014

Proceedings of the Human Factors and Ergonomics Society Annual

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As the population of adults aged 65 and above is rapidly growing, it is crucial to identify physical and cognitive limitations pertaining to daily living. The aim of the study was to examine the impact of cognitive fatigue on age-related changes in neuromuscular fatigue and associated brain patterns of the prefrontal cortex.12 younger (20-35 years) and 11 older (65 and above years) females performed intermittent handgrip exercises at 30% maximum voluntary contraction (MVC) until voluntary exhaustion in the absence and presence of a prior 60-minute cognitively demanding task.Cognitive fatigue was successfully and comparably induced across both the younger and older groups (p<0.001). While neuromuscular fatigue outcomes (i.e., endurance time and rate of strength loss) and muscular responses were similar across groups (all p>0.100), greater decrements in cognitive fatiguerelated brain activation (p=0.053) were observed in older adults when compared to younger adults. Differences in brain activation suggest an age-related compensatory mechanism (i.e., the scaffolding theory of cognitive aging) of the frontal lobe to regulate the effect of cognitive fatigue to maintain neuromuscular performance.iii ACKNOWLEDGEMENTS

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Section: Discussionsupporting

confidence: 49%

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

Shortz

Mehta

2014

Proceedings of the Human Factors and Ergonomics Society Annual

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“…Furthermore, this study was pointed to noticeable assembly performance interference due to musculoskeletal discomfort among participants. The research study by (Mehta & Agnew, 2013;Mehta, Nussbaum, & Agnew, 2012) reported that the interaction between physical and mental demands, will…”

Section: Discussionmentioning

confidence: 99%

G3-4　Musculoskeletal Discomforts among Assembly Team Members performing Assembly Welding Task

Aziz

Ghazalli

Mohamed

et al. 2017

The Japanese journal of ergonomics

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Work in the automotive assembly plant is physically strenuous and assembly team members are particularly at risk for developing symptoms of musculoskeletal discomforts (MSDs) compared to other sectors. The main aim of this study was to determine the prevalence rate of musculoskeletal discomforts based on the frequency, severity and performance interference among production assembly team members in an automotive component assembly plant. A cross-sectional study was carried out among the production assembly team members who performed manual assembly welding task. The Cornell Musculoskeletal Disorders Questionnaire (CMDQ) data sheets were used in interview with the assembly team members to obtain the prevalence of MSDs. The prevalence of pain in the upper back, lower back, right shoulder and right wrist have been reported to be higher in comparison with pain in other parts of the body. The current study identified the severe musculoskeletal discomfort allies with production assembly line. Assembly team member's lines 4 were reported high mean frequency discomfort, severely discomfort and interfered assembling task performance. It has been discovered; nonetheless, that assembly team member's assembling task performance has interfered with lower back pain. MSD's survey appeared to be very helpful to screen the production assembly team member's health,well-being and performance. The results are also useful for assessing the ergonomics risks factors in the future study.

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“…12,14,15 However, stress can be both a cause as well as a consequence of obesity. In healthy adults, stress has shown to impair motor function, [16][17][18] increase muscle fatigability 19,20 and hinder muscular and cardiovascular recovery, 21 which can ultimately put stressed workers at greater risks of developing musculoskeletal disorders and cardiovascular diseases. 22,23 Recent investigations have suggested that obesitylinked structural changes in the brain 24 can result in slower information processing speed and reduce efficiency of sensory integration 25 that has shown to impair both cognitive 26 and motor functions.…”

Section: Introductionmentioning

confidence: 99%

Impacts of obesity and stress on neuromuscular fatigue development and associated heart rate variability

Mehta

2014

Int J Obes

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The present study provides the first evidence that stress-related neuromuscular fatigue development is accelerated in obese individuals. In addition, the stress condition resulted in poorer HRV indices, which is indicative of autonomic dysfunction, particularly in the obese group. These findings indicate that workers are more susceptible to fatigue in high-stress work environments, particularly those with higher BMI, which can increase the risk of musculoskeletal injuries as well as cardiovascular diseases in this population.

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Exertion-Dependent Effects of Physical and Mental Workload on Physiological Outcomes and Task Performance

Cited by 24 publications

References 46 publications

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

G3-4　Musculoskeletal Discomforts among Assembly Team Members performing Assembly Welding Task

Impacts of obesity and stress on neuromuscular fatigue development and associated heart rate variability

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Exertion-Dependent Effects of Physical and Mental Workload on Physiological Outcomes and Task Performance

Cited by 24 publications

References 46 publications

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

The Impact of Cognitive Fatigue on Age-related Differences in Neuromuscular Function

G3-4 Musculoskeletal Discomforts among Assembly Team Members performing Assembly Welding Task

Impacts of obesity and stress on neuromuscular fatigue development and associated heart rate variability

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Product

Resources

About

G3-4　Musculoskeletal Discomforts among Assembly Team Members performing Assembly Welding Task