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Concurrent cognitive task may improve motor work performance and reduce muscle fatigue.
Maria Evstigneeva1, Aleksandr Aleksandrov, Svend Erik Mathiassen
1Saint Petersburg State University, Saint Petersburg, Russia. maria.evstigneeva@gmail.com
Work (Reading, Mass.)
|February 10, 2012
Summary
Engaging in cognitive tasks during physical exertion, particularly those involving active discrimination and motor responses, can slow muscle fatigue and improve handgrip performance. Passive listening, however, may exacerbate fatigue during strenuous activity.
Area of Science:
- Neuroscience
- Sports Science
- Human Performance
Background:
- Muscle fatigue and performance decline during physical tasks are significant concerns in sports and occupational settings.
- Cognitive load has been hypothesized to influence physical performance and fatigue development.
Purpose of the Study:
- To investigate how different levels of cognitive information processing affect motor task performance and muscle fatigue.
- To compare the impact of passive auditory perception, active auditory discrimination, and active discrimination with motor response on fatigue.
Main Methods:
- Seventeen healthy volunteers performed handgrip tests at 30% and 7% of maximal voluntary contraction (MVC).
- Cognitive tasks included passive audio perception, active audio discrimination, and active discrimination with a motor response.
- Muscle fatigue development and MVC were measured during and after the fatiguing conditions.
Main Results:
- Active cognitive tasks, especially those with a motor component, slowed perceived fatigue development during 30% MVC compared to passive listening.
- Maximal voluntary contraction (MVC) tended to decrease more after fatiguing exercise with passive listening than with active cognitive tasks.
- Motor task performance during fatiguing conditions was superior with active cognitive tasks (with or without motor response) compared to passive listening.
Conclusions:
- Active cognitive engagement, particularly with a motor response, can mitigate muscle fatigue and preserve motor performance during physical exertion.
- The level of cognitive processing and its interaction with motor output significantly influence the fatigue response.
