Cardiovascular and cerebral hemodynamics during exercise and recovery in obese individuals as a function of their fitness status

The aim of this study was to compare cardiovascular hemodynamics and cerebral oxygenation/perfusion (COP) during and after maximal incremental exercise in obese individuals according to their aerobic fitness versus age‐matched healthy controls (AMHC). Fifty‐four middle–aged obese (OB) and 16 AMHC we...

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Veröffentlicht in:Physiological reports 2017-06, Vol.5 (12), p.e13321-n/a
Hauptverfasser: Gayda, Mathieu, Lapierre, Gabriel, Dupuy, Olivier, Fraser, Sarah, Bherer, Louis, Juneau, Martin, Gremeaux, Vincent, Nigam, Anil
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container_title Physiological reports
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Lapierre, Gabriel
Dupuy, Olivier
Fraser, Sarah
Bherer, Louis
Juneau, Martin
Gremeaux, Vincent
Nigam, Anil
description The aim of this study was to compare cardiovascular hemodynamics and cerebral oxygenation/perfusion (COP) during and after maximal incremental exercise in obese individuals according to their aerobic fitness versus age‐matched healthy controls (AMHC). Fifty‐four middle–aged obese (OB) and 16 AMHC were recruited. Maximal cardiopulmonary function (gas exchange analysis), cardiac hemodynamics (impedance cardiography), and left frontal COP (near‐infrared spectroscopy: NIRS) were measured continuously during a maximal incremental ergocycle test. During recovery, reoxygenation/perfusion rate (ROPR: oxyhemoglobin: ΔO2Hb, deoxyhemoglobin: ΔHHb and total hemoglobin: ΔtHb; with NIRS) was also measured. Obese participants (OB, n = 54) were divided into two groups according to the median V˙O2 peak: the low‐fit obese (LF‐OB, n = 27) and the high‐fit obese (HF‐OB, n = 27). During exercise, end tidal pressure of CO2 (PETCO2), and COP (ΔO2Hb, ΔHHb and ΔtHb) did not differ between groups (OB, LF‐OB, HF‐OB, AMHC). During recovery, PETCO2 and ROPR (ΔO2Hb, ΔHHb and ΔtHb) were similar between the groups (OB, LF‐OB, HF‐OB, AMHC). During exercise and recovery, cardiac index was lower (P 
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Fifty‐four middle–aged obese (OB) and 16 AMHC were recruited. Maximal cardiopulmonary function (gas exchange analysis), cardiac hemodynamics (impedance cardiography), and left frontal COP (near‐infrared spectroscopy: NIRS) were measured continuously during a maximal incremental ergocycle test. During recovery, reoxygenation/perfusion rate (ROPR: oxyhemoglobin: ΔO2Hb, deoxyhemoglobin: ΔHHb and total hemoglobin: ΔtHb; with NIRS) was also measured. Obese participants (OB, n = 54) were divided into two groups according to the median V˙O2 peak: the low‐fit obese (LF‐OB, n = 27) and the high‐fit obese (HF‐OB, n = 27). During exercise, end tidal pressure of CO2 (PETCO2), and COP (ΔO2Hb, ΔHHb and ΔtHb) did not differ between groups (OB, LF‐OB, HF‐OB, AMHC). During recovery, PETCO2 and ROPR (ΔO2Hb, ΔHHb and ΔtHb) were similar between the groups (OB, LF‐OB, HF‐OB, AMHC). During exercise and recovery, cardiac index was lower (P &lt; 0.05) in LF‐OB versus the other two groups (HF‐OB, AMHC). As well, systolic blood pressure was higher during exercise in the OB, LF‐OB and HF‐OB groups versus AMHC (P &lt; 0.05). When compared to AMHC, obese individuals (OB, LF‐OB, HF‐OB) have a similar cerebral vasoreactivity by CO2 and cerebral hemodynamics during exercise and recovery, but a higher systolic blood pressure during exercise. Higher fitness in obese subjects (HF‐OB) seems to preserve their cardiopulmonary and cardiac function during exercise and recovery. The aim of this study was to compare cardiovascular and cerebral hemodynamics during and after maximal incremental exercise in low‐ and high‐fit obese subjects versus age‐matched healthy controls (AMHC). When compared to AMHC, obese groups have a similar cerebral vasodilatation by CO2 and cerebral hemodynamics during exercise and recovery. Obese subjects have a higher systolic blood pressure during exercise. 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Physiological Reports published by Wiley Periodicals, Inc. on behalf of The Physiological Society and the American Physiological Society.</rights><rights>2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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As well, systolic blood pressure was higher during exercise in the OB, LF‐OB and HF‐OB groups versus AMHC (P &lt; 0.05). When compared to AMHC, obese individuals (OB, LF‐OB, HF‐OB) have a similar cerebral vasoreactivity by CO2 and cerebral hemodynamics during exercise and recovery, but a higher systolic blood pressure during exercise. Higher fitness in obese subjects (HF‐OB) seems to preserve their cardiopulmonary and cardiac function during exercise and recovery. The aim of this study was to compare cardiovascular and cerebral hemodynamics during and after maximal incremental exercise in low‐ and high‐fit obese subjects versus age‐matched healthy controls (AMHC). When compared to AMHC, obese groups have a similar cerebral vasodilatation by CO2 and cerebral hemodynamics during exercise and recovery. Obese subjects have a higher systolic blood pressure during exercise. 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Fifty‐four middle–aged obese (OB) and 16 AMHC were recruited. Maximal cardiopulmonary function (gas exchange analysis), cardiac hemodynamics (impedance cardiography), and left frontal COP (near‐infrared spectroscopy: NIRS) were measured continuously during a maximal incremental ergocycle test. During recovery, reoxygenation/perfusion rate (ROPR: oxyhemoglobin: ΔO2Hb, deoxyhemoglobin: ΔHHb and total hemoglobin: ΔtHb; with NIRS) was also measured. Obese participants (OB, n = 54) were divided into two groups according to the median V˙O2 peak: the low‐fit obese (LF‐OB, n = 27) and the high‐fit obese (HF‐OB, n = 27). During exercise, end tidal pressure of CO2 (PETCO2), and COP (ΔO2Hb, ΔHHb and ΔtHb) did not differ between groups (OB, LF‐OB, HF‐OB, AMHC). During recovery, PETCO2 and ROPR (ΔO2Hb, ΔHHb and ΔtHb) were similar between the groups (OB, LF‐OB, HF‐OB, AMHC). During exercise and recovery, cardiac index was lower (P &lt; 0.05) in LF‐OB versus the other two groups (HF‐OB, AMHC). As well, systolic blood pressure was higher during exercise in the OB, LF‐OB and HF‐OB groups versus AMHC (P &lt; 0.05). When compared to AMHC, obese individuals (OB, LF‐OB, HF‐OB) have a similar cerebral vasoreactivity by CO2 and cerebral hemodynamics during exercise and recovery, but a higher systolic blood pressure during exercise. Higher fitness in obese subjects (HF‐OB) seems to preserve their cardiopulmonary and cardiac function during exercise and recovery. The aim of this study was to compare cardiovascular and cerebral hemodynamics during and after maximal incremental exercise in low‐ and high‐fit obese subjects versus age‐matched healthy controls (AMHC). When compared to AMHC, obese groups have a similar cerebral vasodilatation by CO2 and cerebral hemodynamics during exercise and recovery. Obese subjects have a higher systolic blood pressure during exercise. Higher fitness in obese subjects may preserve their cardiopulmonary and cardiac function during exercise and recovery.</abstract><cop>United States</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>28642340</pmid><doi>10.14814/phy2.13321</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-7273-8272</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adipose Tissue and Obesity
Aged
Blood Pressure
Carbon dioxide
Cardiac and cerebral hemodynamics
Cardiorespiratory Fitness
Cardiovascular Physiology
Central Nervous System
Cerebrovascular Circulation
Circulatory system
Endurance and Performance
Exercise
Exercise Therapy - methods
Female
Gas exchange
Gas Exchange and Transport
Heart
Hemodynamics
Hemoglobin
Hemoglobins - metabolism
Human health and pathology
Humans
Infrared spectroscopy
Life Sciences
Male
Middle Aged
obesity
Obesity - physiopathology
Obesity - rehabilitation
Obesity - therapy
Original Research
Oxygen Consumption
Oxygenation
Perfusion
Physical fitness
Physiology
recovery
Tissues and Organs
Vasoconstriction
title Cardiovascular and cerebral hemodynamics during exercise and recovery in obese individuals as a function of their fitness status
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