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Exercise intensity-specific changes to cerebral blood velocity do not modulate a postexercise executive function

Benjamin Tari1, Mustafa Shirzad1, Nikan Behboodpour1

  • 1School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, 1151 Richmond St, London, ON, N6A 3K7, Canada.

Neuropsychologia
|September 6, 2021
PubMed
Summary
This summary is machine-generated.

Aerobic exercise enhances executive function, but increased cerebral blood flow (CBF) with higher exercise intensity does not amplify this benefit. The magnitude of CBF change during exercise does not impact postexercise executive function improvements.

Keywords:
Aerobic exerciseAntisaccadeExercise intensityTranscranial DopplerVision

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Cognitive Science

Background:

  • Aerobic exercise transiently improves executive function.
  • Increased cerebral blood flow (CBF) is a proposed mechanism for this cognitive enhancement.
  • Drive theory suggests higher exercise intensity, leading to greater CBF, amplifies executive function benefits.

Purpose of the Study:

  • To empirically test if increasing exercise intensity and subsequent cerebral blood flow (CBF) magnitude enhances postexercise executive function.
  • To investigate the relationship between exercise intensity, CBF, and executive function performance.

Main Methods:

  • Participants completed graded aerobic exercise sessions (light, moderate, heavy intensity).
  • Cerebral blood flow (CBF) was estimated using transcranial Doppler ultrasound and near-infrared spectroscopy.
  • Executive function was assessed using the antisaccade task before and after exercise.

Main Results:

  • Cerebral blood flow (CBF) velocity increased with exercise intensity.
  • Deoxygenated hemoglobin (HHb) changes were similar across intensities.
  • Postexercise executive function improvements (antisaccade reaction time) were comparable across all exercise intensities.

Conclusions:

  • The magnitude of cerebral blood flow (CBF) increase during aerobic exercise does not influence the extent of postexercise executive function enhancement.
  • Exercise intensity does not differentially impact the cognitive benefits of aerobic exercise via CBF modulation.