Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit
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 increasin...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2021
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| _version_ | 1826310335891505152 |
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| author | Tari, B Shirzad, M Behboodpour, N Belfry, GR Heath, M |
| author_facet | Tari, B Shirzad, M Behboodpour, N Belfry, GR Heath, M |
| author_sort | Tari, B |
| collection | OXFORD |
| description | 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 V̇O<sub>2peak</sub> test to determine cardiorespiratory fitness and estimated lactate threshold (LT), followed by separate 10-min sessions of light- (i.e., 25 W), moderate- (i.e., 80% estimated LT), and heavy-intensity (i.e., 15% of the difference between LT and V̇O<sub>2peak</sub>) 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. |
| first_indexed | 2024-03-07T07:50:25Z |
| format | Journal article |
| id | oxford-uuid:b5a0a356-19e6-4421-be8e-2cb9014617bc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:50:25Z |
| publishDate | 2021 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:b5a0a356-19e6-4421-be8e-2cb9014617bc2023-07-06T09:49:52ZExercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefitJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b5a0a356-19e6-4421-be8e-2cb9014617bcEnglishSymplectic ElementsElsevier2021Tari, BShirzad, MBehboodpour, NBelfry, GRHeath, MExecutive 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 V̇O<sub>2peak</sub> test to determine cardiorespiratory fitness and estimated lactate threshold (LT), followed by separate 10-min sessions of light- (i.e., 25 W), moderate- (i.e., 80% estimated LT), and heavy-intensity (i.e., 15% of the difference between LT and V̇O<sub>2peak</sub>) 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. |
| spellingShingle | Tari, B Shirzad, M Behboodpour, N Belfry, GR Heath, M Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title | Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title_full | Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title_fullStr | Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title_full_unstemmed | Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title_short | Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
| title_sort | exercise intensity specific changes to cerebral blood velocity do not modulate a postexercise executive function benefit |
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