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Moderate and vigorous aerobic exercise enhances inhibitory control, but not working memory or cognitive flexibility,
Marcelo Hiro Akiyoshi Ichige1, Paulo Roberto Santos-Silva1, Julia Maria D'Andrea Greve1
1Laboratorio de Estudos do Movimento, Instituto de Ortopedia e Traumatologia do Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil.
Introduction:
The effects of acute physical exercise on executive functions remain controversial, partly due to inconsistencies in how exercise intensity is measured. This study investigated the impact of moderate and vigorous aerobic exercise on three core components of executive function: inhibitory control, working memory, and cognitive flexibility. Exercise intensity was rigorously defined using a combination of heart rate reserve, ventilatory thresholds, and rate of perceived exertion.
Method:
Twenty-six physically active adults completed three separate sessions in a randomized order: Rest (REST), Moderate-intensity exercise (MOD), and Vigorous-Intensity exercise (VIG). Cognitive performance was assessed during each condition using the Go/No-Go test (inhibitory control), the 2-back test (working memory), and the Multitasking test (cognitive flexibility).
Results:
Inhibitory control improved significantly during exercise. Response Times (RT) on the Go/No-Go test were reduced in both MOD (p = 0.038) and VIG (p = 0.003) compared with REST, without changes in accuracy. In contrast, working memory and cognitive flexibility showed no significant differences across conditions.
Conclusions:
Acute moderate and vigorous aerobic exercise, up to the second ventilatory threshold, selectively enhances inhibitory control by reducing RT, with no detectable effects on working memory or cognitive flexibility. By integrating multiple physiological and perceptual markers of intensity, this study provides a rigorous evaluation of the acute cognitive effects of aerobic exercise.
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