title: Cardiac autonomic and haemodynamic recovery after a single session of aerobic exercise with and without blood flow restriction in older adults.
abstract: This study investigated the autonomic and haemodynamic responses to different aerobic exercise loads, with and without blood flow restriction (BFR). In a crossover study, 21 older adults (8 males and 13 females) completed different aerobic exercise sessions: low load without BFR (LL) (40% VO2max), low load with BFR (LL-BFR) (40% VO2max+ 50% BFR) and high load without BFR (HL) (70% VO2max). Heart rate variability and haemodynamic responses were recorded during rest and throughout 30 min of recovery. HL reduced R-R interval, the root mean square of successive difference of R-R intervals and high frequency during 30 min of recovery at a greater magnitude compared with LL and LL-BFR. Sympathetic-vagal balance increased the values for HL during 30 min of recovery at a greater magnitude when compared with LL and LL-BFR. Post-exercise haemodynamic showed reduced values of double product at 30 min of recovery compared to rest in LL-BFR, while HL showed higher values compared to rest, LL-BFR and LL. Reduced systolic blood pressure was observed for LL-BFR (30 min) compared to rest. Autonomic and haemodynamic responses indicate lower cardiovascular stress after LL-BFR compared to HL, being this method, besides the functional adaptations, a potential choice to attenuate the cardiovascular stress after exercise in older adults.
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Marina Lívia Venturini
authors.initials: MLV
authors.lastname: Ferreira
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.|b Gerontology Post Graduation Program, School of Medical Science , University of Campinas , São Paulo , Brazil.
authors.forename: Amanda Veiga
authors.initials: AV
authors.lastname: Sardeli
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Giovana Vergínia De
authors.initials: GV
authors.lastname: Souza
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Valéria
authors.initials: V
authors.lastname: Bonganha
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Lucas Do Carmo
authors.initials: LDC
authors.lastname: Santos
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Alex
authors.initials: A
authors.lastname: Castro
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Cláudia Regina
authors.initials: CR
authors.lastname: Cavaglieri
authors.affiliation: a Exercise Physiology Laboratory - FISEX, School of Physical Education , University of Campinas , São Paulo , Brazil.
authors.forename: Mara Patrícia Traina
authors.initials: MPT
authors.lastname: Chacon-Mikahil
mesh_terms: D000368:Aged; D001132:Arm / Q000098:blood supply; D001341:Autonomic Nervous System / Q000502:physiology*; D018592:Cross-Over Studies; D015444:Exercise / Q000502:physiology*; D005260:Female; D006321:Heart / Q000294:innervation*; D006339:Heart Rate / Q000502:physiology*; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000098:blood supply / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology; D010465:Perception; D005082:Physical Exertion / Q000502:physiology; D012039:Regional Blood Flow / Q000502:physiology
keywords: Aging; heart rate variability and blood pressure; vascular occlusion; walking