Safety and Health at Work Vol. 10 Issue 3 2019
The Interaction of Cognitive Interference, Standing Surface, and Fatigue on Lower Extremity Muscle Activity (Original Article)
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Title
Safety and Health at Work Vol. 10 Issue 3 2019
The Interaction of Cognitive Interference, Standing Surface, and Fatigue on Lower Extremity Muscle Activity (Original Article)
The Interaction of Cognitive Interference, Standing Surface, and Fatigue on Lower Extremity Muscle Activity (Original Article)
Subject
Anti-fatigue, Dual-task, Postural control, Standing surface
Description
Background: Performing cognitive tasks and muscular fatigue have been shown to increase muscle activity of the lower extremity during quiet standing. A common intervention to reduce muscular fatigue is to provide a softer shoe-surface interface. However, little is known regarding how muscle activity is affected by softer shoe-surface interfaces during static standing. The purpose of this study was to assess lower extremity muscular activity during erect standing on three different standing surfaces, before and after an acute workload and during cognitive tasks.
Methods: Surface electromyography was collected on ankle dorsiflexors and plantarflexors, and knee
flexors and extensors of fifteen male participants. Dependent electromyography variables of mean, peak, root mean square, and cocontraction index were calculated and analyzed with a 2 2 3 within-
subject repeated measures analysis of variance.
Results: Pre-workload muscle activity did not differ between surfaces and cognitive task conditions.
However, greater muscle activity during post-workload balance assessment was found, specifically during the cognitive task. Cognitive task errors did not differ between surface and workload.
Conclusions: The cognitive task after workload increased lower extremity muscular activity compared to quite standing, irrespective of the surface condition, suggesting an increased demand was placed on the postural control system as the result of both fatigue and cognitive task.
Methods: Surface electromyography was collected on ankle dorsiflexors and plantarflexors, and knee
flexors and extensors of fifteen male participants. Dependent electromyography variables of mean, peak, root mean square, and cocontraction index were calculated and analyzed with a 2 2 3 within-
subject repeated measures analysis of variance.
Results: Pre-workload muscle activity did not differ between surfaces and cognitive task conditions.
However, greater muscle activity during post-workload balance assessment was found, specifically during the cognitive task. Cognitive task errors did not differ between surface and workload.
Conclusions: The cognitive task after workload increased lower extremity muscular activity compared to quite standing, irrespective of the surface condition, suggesting an increased demand was placed on the postural control system as the result of both fatigue and cognitive task.
Creator
Christopher M. Hill, Hunter DeBusk, Jeffrey D. Simpson, Brandon L. Miller, Adam C. Knight, John C. Garner, Chip Wade, Harish Chander
Publisher
Elsevier Korea LLC
Date
September 2019
Contributor
Sri Wahyuni
Format
PDF
Language
English
Type
Text
Coverage
Safety and Health at Work Vol. 10 Issue 3 2019
Files
Citation
Christopher M. Hill, Hunter DeBusk, Jeffrey D. Simpson, Brandon L. Miller, Adam C. Knight, John C. Garner, Chip Wade, Harish Chander, “Safety and Health at Work Vol. 10 Issue 3 2019
The Interaction of Cognitive Interference, Standing Surface, and Fatigue on Lower Extremity Muscle Activity (Original Article),” Repository Horizon University Indonesia, accessed February 5, 2025, https://repository.horizon.ac.id/items/show/1946.
The Interaction of Cognitive Interference, Standing Surface, and Fatigue on Lower Extremity Muscle Activity (Original Article),” Repository Horizon University Indonesia, accessed February 5, 2025, https://repository.horizon.ac.id/items/show/1946.