Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training

Abstract A common inclusion criterion when assessing cerebrovascular (CVR) metrics is for individuals to abstain from exercise for 12–24 hr prior to data collections. While several studies have examined CVR during exercise, the literature describing CVR throughout post‐exercise recovery is sparse. T...

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Main Authors: Joel S. Burma, Alannah Macaulay, Paige Copeland, Omeet Khatra, Kevin J. Bouliane, Jonathan D. Smirl
Format: Article
Language:English
Published: Wiley 2020-06-01
Series:Physiological Reports
Subjects:
Online Access:https://doi.org/10.14814/phy2.14467
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spelling doaj-6a8bcbf60a2f400e974e1d22d06dd43d2020-11-25T03:54:54ZengWileyPhysiological Reports2051-817X2020-06-01811n/an/a10.14814/phy2.14467Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous trainingJoel S. Burma0Alannah Macaulay1Paige Copeland2Omeet Khatra3Kevin J. Bouliane4Jonathan D. Smirl5Sport Concussion Research Lab University of British Columbia Kelowna BC CanadaSport Concussion Research Lab University of British Columbia Kelowna BC CanadaSport Concussion Research Lab University of British Columbia Kelowna BC CanadaFaculty of Medicine University of British Columbia Vancouver BC CanadaSport Concussion Research Lab University of British Columbia Kelowna BC CanadaSport Concussion Research Lab University of British Columbia Kelowna BC CanadaAbstract A common inclusion criterion when assessing cerebrovascular (CVR) metrics is for individuals to abstain from exercise for 12–24 hr prior to data collections. While several studies have examined CVR during exercise, the literature describing CVR throughout post‐exercise recovery is sparse. The current investigation examined CVR measurements in nine participants (seven male) before and for 8 hr following three conditions: 45‐min moderate‐continuous exercise (at ~50% heart‐rate reserve), 25‐min high‐intensity intervals (ten, one‐minute intervals at ~85% heart‐rate reserve), and a control day (30‐min quiet rest). The hypercapnic (40–60 mmHg) and hypocapnic (25–40 mmHg) slopes were assessed via a modified rebreathing technique and controlled stepwise hyperventilation, respectively. All testing was initiated at 8:00a.m. with transcranial Doppler ultrasound measurements to index cerebral blood velocity performed prior to the condition (pre) with serial follow‐ups at zero, one, two, four, six, and eight hours within the middle and posterior cerebral artery (MCA, PCA). Absolute and relative MCA and PCA hypercapnic slopes were attenuated following high‐intensity intervals at hours zero and one (all p < .02). No alterations were observed in either hypocapnic or hypercapnic slopes following the control or moderate‐continuous exercise (all p > .13), aside from a reduced relative hypercapnic MCA slope at hours zero and one following moderate‐continuous exercise (all p < .005). The current findings indicate the common inclusion criteria of a 12–24 hr time restriction on exercise can be reduced to two hours when performing CVR measures. Furthermore, the consistent nature of the CVR indices throughout the control day indicate reproducible testing sessions can be made between 8:00a.m. and 7:00p.m.https://doi.org/10.14814/phy2.14467acute recoverycerebral blood flowcerebrovascular reactivityexercisehyperventilationrebreathing
collection DOAJ
language English
format Article
sources DOAJ
author Joel S. Burma
Alannah Macaulay
Paige Copeland
Omeet Khatra
Kevin J. Bouliane
Jonathan D. Smirl
spellingShingle Joel S. Burma
Alannah Macaulay
Paige Copeland
Omeet Khatra
Kevin J. Bouliane
Jonathan D. Smirl
Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
Physiological Reports
acute recovery
cerebral blood flow
cerebrovascular reactivity
exercise
hyperventilation
rebreathing
author_facet Joel S. Burma
Alannah Macaulay
Paige Copeland
Omeet Khatra
Kevin J. Bouliane
Jonathan D. Smirl
author_sort Joel S. Burma
title Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
title_short Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
title_full Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
title_fullStr Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
title_full_unstemmed Comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
title_sort comparison of cerebrovascular reactivity recovery following high‐intensity interval training and moderate‐intensity continuous training
publisher Wiley
series Physiological Reports
issn 2051-817X
publishDate 2020-06-01
description Abstract A common inclusion criterion when assessing cerebrovascular (CVR) metrics is for individuals to abstain from exercise for 12–24 hr prior to data collections. While several studies have examined CVR during exercise, the literature describing CVR throughout post‐exercise recovery is sparse. The current investigation examined CVR measurements in nine participants (seven male) before and for 8 hr following three conditions: 45‐min moderate‐continuous exercise (at ~50% heart‐rate reserve), 25‐min high‐intensity intervals (ten, one‐minute intervals at ~85% heart‐rate reserve), and a control day (30‐min quiet rest). The hypercapnic (40–60 mmHg) and hypocapnic (25–40 mmHg) slopes were assessed via a modified rebreathing technique and controlled stepwise hyperventilation, respectively. All testing was initiated at 8:00a.m. with transcranial Doppler ultrasound measurements to index cerebral blood velocity performed prior to the condition (pre) with serial follow‐ups at zero, one, two, four, six, and eight hours within the middle and posterior cerebral artery (MCA, PCA). Absolute and relative MCA and PCA hypercapnic slopes were attenuated following high‐intensity intervals at hours zero and one (all p < .02). No alterations were observed in either hypocapnic or hypercapnic slopes following the control or moderate‐continuous exercise (all p > .13), aside from a reduced relative hypercapnic MCA slope at hours zero and one following moderate‐continuous exercise (all p < .005). The current findings indicate the common inclusion criteria of a 12–24 hr time restriction on exercise can be reduced to two hours when performing CVR measures. Furthermore, the consistent nature of the CVR indices throughout the control day indicate reproducible testing sessions can be made between 8:00a.m. and 7:00p.m.
topic acute recovery
cerebral blood flow
cerebrovascular reactivity
exercise
hyperventilation
rebreathing
url https://doi.org/10.14814/phy2.14467
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