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

Détails

ID Serval
serval:BIB_8A911C7BA9F7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Cardiovascular and cerebral hemodynamics during exercise and recovery in obese individuals as a function of their fitness status
Périodique
Physiol Rep
Auteur(s)
Gayda M., Lapierre G., Dupuy O., Fraser S., Bherer L., Juneau M., Gremeaux V., Nigam A.
ISSN
2051-817X (Electronic)
ISSN-L
2051-817X
Statut éditorial
Publié
Date de publication
06/2017
Volume
5
Numéro
12
Langue
anglais
Notes
Gayda, Mathieu
Lapierre, Gabriel
Dupuy, Olivier
Fraser, Sarah
Bherer, Louis
Juneau, Martin
Gremeaux, Vincent
Nigam, Anil
eng
Controlled Clinical Trial
Physiol Rep. 2017 Jun;5(12). pii: 5/12/e13321. doi: 10.14814/phy2.13321.
Résumé
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: DeltaO2Hb, deoxyhemoglobin: DeltaHHb and total hemoglobin: DeltatHb; 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 (DeltaO2Hb, DeltaHHb and DeltatHb) did not differ between groups (OB, LF-OB, HF-OB, AMHC). During recovery, PETCO2 and ROPR (DeltaO2Hb, DeltaHHb and DeltatHb) were similar between the groups (OB, LF-OB, HF-OB, AMHC). During exercise and recovery, cardiac index was lower (P < 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 < 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.
Mots-clé
Aged, *Blood Pressure, *Cardiorespiratory Fitness, *Cerebrovascular Circulation, *Exercise, Exercise Therapy/*methods, Female, Hemoglobins/metabolism, Humans, Male, Middle Aged, Obesity/*physiopathology/rehabilitation/therapy, Oxygen Consumption, Vasoconstriction, Cardiac and cerebral hemodynamics, exercise, obesity, recovery
Pubmed
Création de la notice
26/11/2019 12:35
Dernière modification de la notice
11/12/2019 7:26
Données d'usage