Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit.
Neuropsychologia
; 161: 108018, 2021 10 15.
Article
em En
| MEDLINE
| ID: mdl-34487738
ABSTRACT
Executive function is transiently improved (i.e., <60-min) following a single bout of aerobic exercise. A candidate mechanism for this improvement is an exercise-mediated increase in cerebral blood flow (CBF). Further, it has been proposed that an increase in CBF across the continuum of increasing exercise intensities improves the magnitude of a postexercise executive function benefit (i.e., drive theory); however, this proposal has not been empirically tested. Here, participants completed four experimental sessions a VÌO2peak test to determine cardiorespiratory fitness and estimated lactate threshold (LT), followed by separate 10-min sessions of light- (i.e., 25â¯W), moderate- (i.e., 80% estimated LT), and heavy-intensity (i.e., 15% of the difference between LT and VÌO2peak) aerobic exercise. An estimate of CBF during exercise was achieved via transcranial Doppler ultrasound and near-infrared spectroscopy to quantify blood velocity (BV) through the middle cerebral artery and deoxygenated hemoglobin (HHb), respectively. Executive function was assessed before and after each session via the executive-mediated antisaccade task (i.e., saccade mirror-symmetrical to a target). Results demonstrated that BV increased in relation to increasing exercise intensity, whereas HHb decreased by a comparable magnitude independent of intensity. In terms of executive function, null hypothesis and equivalence tests indicated a comparable magnitude postexercise reduction in antisaccade reaction time across exercise intensities. Accordingly, the magnitude of CBF change during exercise does not impact the magnitude of a postexercise executive function benefit.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Função Executiva
/
Aptidão Cardiorrespiratória
Limite:
Humans
Idioma:
En
Revista:
Neuropsychologia
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Canadá