Effect of Acute Exercise on P300 Event-Related Potential and Its Correlation With Blood Lactate Levels

Area of Science:

• Neuroscience
• Exercise Physiology
• Cognitive Science

Background:

• Acute exercise transiently enhances cognitive function.
• Lactate, produced during aerobic exercise, may influence neuroplasticity and cognitive processes.
• P300 event-related potential (ERP) indices are sensitive to cognitive changes.

Purpose of the Study:

• To investigate the impact of acute exhaustive aerobic exercise on cognitive performance.
• To examine the relationship between blood lactate levels and P300 ERP measures post-exercise.
• To assess changes in P300 latency, N2P3 amplitude, and reaction time following exercise.

Main Methods:

• Fifty healthy males underwent the Bruce protocol for exhaustive aerobic exercise.
• Blood lactate levels were measured using point-of-care testing.
• Auditory P300 ERPs were recorded at baseline and various time points post-exercise using a 4-channel system and oddball paradigm.
• Cognitive outcomes included P300 latency, N2P3 amplitude, and reaction time.

Main Results:

• Lactate levels significantly increased immediately post-exercise.
• P300 latency decreased, and N2P3 amplitude increased significantly post-exercise compared to baseline.
• Mean reaction time (MRT) decreased, indicating faster cognitive processing.
• A positive correlation was observed between blood lactate rise and N2P3 amplitude.

Conclusions:

• Acute exhaustive exercise enhances cognitive efficiency, demonstrated by improved ERP measures and reaction times.
• The observed association between lactate increase and ERP changes suggests lactate's potential role in exercise-induced cognitive benefits.
• Findings support exploring lactate-focused interventions for cognitive enhancement and rehabilitation.