Enhanced cardiac vagal efferent activity does not explain training-induced bradycardia

Autor: Pascale Calabrese, Hélène Perrault, Veronika Lesiuk, Tuan Pham Dinh, Adrienne S. Scott, Gila Benchetrit, Dror Ofir, André Eberhard
Přispěvatelé: Montreal Chest Institute, McGill University Health Center [Montreal] (MUHC), Laboratoire de Modélisation et Calcul (LMC - IMAG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Physiologie cardio-Respiratoire Expérimentale Théorique et Appliquée (TIMC-IMAG-PRETA), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)
Rok vydání: 2004
Předmět:
Male
Blood Pressure
030204 cardiovascular system & hematology
0302 clinical medicine
Heart Rate
MESH: Vagus Nerve
Heart rate variability
Medicine
MESH: Heart Rate
Vagal tone
MESH: Teaching
Tidal volume
Fourier Analysis
Respiration
Vagus Nerve
MESH: Blood Pressure
MESH: Case-Control Studies
Anesthesia
Breathing
Female
medicine.symptom
MESH: Efferent Pathways
MESH: Physical Endurance
Sports
Adult
Bradycardia
Adolescent
Respiratory rate
MESH: Arrhythmia
Sinus
Efferent Pathways
MESH: Bradycardia
03 medical and health sciences
Cellular and Molecular Neuroscience
Endurance training
MESH: Analysis of Variance
Heart rate
[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]
Humans
Arrhythmia
Sinus
MESH: Adolescent
MESH: Respiration
Analysis of Variance
MESH: Humans
Endocrine and Autonomic Systems
business.industry
Teaching
MESH: Adult
MESH: Male
Case-Control Studies
Physical Endurance
Neurology (clinical)
MESH: Sports
business
MESH: Female
MESH: Fourier Analysis
030217 neurology & neurosurgery
Zdroj: Autonomic Neuroscience: Basic and Clinical
Autonomic Neuroscience: Basic and Clinical, Elsevier, 2004, 112 (1-2), pp.60-8. ⟨10.1016/j.autneu.2004.04.006⟩
ISSN: 1566-0702
1872-7484
Popis: International audience; Studies of heart rate variability (HRV) have so far produced contradictory evidence to support the common belief that endurance training enhances cardiac parasympathetic tone. This may be related to the fact that most studies failed to specifically isolate the vagally mediated influence of respiration. This study used a cross-sectional comparison of endurance athletes (n=20; ATHL) exhibiting resting bradycardia and age-matched nonathletes (n=12; CRTL) to indirectly assess training effects on amplitude and timing characteristics of respiratory sinus arrhythmia (RSA). Continuous electrocardiogram (ECG) and ventilatory flows were recorded during spontaneous breathing (SP), as well as during breathing at four cycles less than (M4) or more (P4) than SP, to also examine potential repercussions of training on the sensitivity of the cardiac vagal responses to breathing. A fast Fourier transform procedure was used to quantify the standard spectral high-frequency (HF) and low-frequency (LF) components and a respiratory-centered frequency (RCF) component of HRV. RSA was assessed using a breath-by-breath quantification of the amplitude and timing of the maximum change in instantaneous heart rate. Under baseline SP conditions, heart rate was lower in ATHL (62.6+/-6.5 vs. 75.2+/-9 beats/min; p
Databáze: OpenAIRE
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