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Published on: December 19, 2024
Pushing to the limits: the dynamics of cognitive control during exhausting exercise
Cyril Schmit1, Karen Davranche2, Christopher S Easthope3
1Laboratoire LAMHESS (EA6309), Université de Nice Sophia-Antipolis, France; Institut National du Sport, de l'Expertise et de la Performance (INSEP), Département de la Recherche, Paris, France.
Intense exercise initially enhances cognitive control despite unchanged cerebral oxygenation (Cox). Near exhaustion, reduced Cox correlates with increased errors, suggesting resource redistribution, not hypofrontality.
Area of Science:
- Exercise Physiology
- Cognitive Neuroscience
- Neuroimaging
Background:
- Cognitive control is crucial for task performance.
- The impact of intense exercise on cognitive function and cerebral oxygenation remains debated.
- Understanding cerebral oxygenation (Cox) changes during exercise is key to explaining cognitive alterations.
Purpose of the Study:
- To investigate concurrent changes in cognitive control and cerebral oxygenation (Cox) during strenuous exercise.
- To differentiate exercise-induced cognitive effects from general fatigue.
- To explore the relationship between cerebral oxygenation and cognitive performance under exercise stress.
Main Methods:
- Participants performed the Eriksen flanker task at rest and during intense cycling to exhaustion.
- Prefrontal near-infrared spectroscopy monitored cerebral oxygenation (Cox).
- Electromyography assessed muscle activity; task performance metrics (reaction time, errors) were recorded.
Main Results:
- In the initial exercise phase, cognitive processing efficiency improved without altered Cox.
- Near exhaustion, Cox significantly decreased, but not to hypofrontality levels.
- Despite no selective response inhibition deficits, susceptibility to impulsive errors and reduced error correction increased near exhaustion.
Conclusions:
- Strenuous exercise can initially enhance cognitive efficiency.
- Severe reduction in Cox near exhaustion correlates with increased errors, suggesting cerebral resource redistribution.
- Cognitive control is maintained during intense exercise, but susceptibility to errors increases with fatigue.
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