Short-term effects of a 3-week interval training program on heart rate variability in chronic heart failure. A randomised controlled trial / Florent Besnier in Annals of physical and rehabilitation medicine, Vol. 62, n°5 (Septembre 2019)

Public ISBD [article]  inAnnals of physical and rehabilitation medicine > Vol. 62, n°5 (Septembre 2019) . - p. 321-328 Titre : Short-term effects of a 3-week interval training program on heart rate variability in chronic heart failure. A randomised controlled trial Type de document : texte imprimé Auteurs : Florent Besnier ; Marc Labrunée ; Lisa Richard ; Florence Faggianelli ; Hélène Kerros ; Laurent Soukarié ; Marc Bousquet ; Jean-Michel Sénard Année de publication : 2019 Article en page(s) : p. 321-328 Note générale : doi.org/10.1016/j.rehab.2019.06.013 Langues : Anglais (eng) Mots-clés : Exercise training  Cardiovascular  Rehabilitation  Chronic heart failure  Parasympathetic  Cardiorespiratory fitness Résumé : Background Exaggerated sympathetic nervous system activity associated with low heart rate variability (HRV) is considered to trigger cardiac arrhythmias and sudden death. Regular exercise training is efficient to improve autonomic balance. Objective We aimed to verify the superiority of high-intensity interval training (HIIT) to enhance HRV, cardiorespiratory fitness and cardiac function as compared with moderate intensity continuous training (MICT) in a short, intense cardiac rehabilitation program. Methods This was a prospective, monocentric, evaluator-blinded, randomised (1:1) study with a parallel two-group design. Overall, 31 individuals with voluntary chronic heart failure (CHF) (left ventricular ejection fraction [LVEF] < 45%) were allocated to MICT (n = 15) or HIIT (n = 16) for a short rehabilitation program (mean [SD] 27 [4] days). Participants underwent 24-hr electrocardiography, echocardiography and a cardiopulmonary exercise test at entry and at the end of the study. Results High-frequency power in normalized units (HFnu%) measured as HRV increased with HIIT (from 21.2% to 26.4%, P < 0.001) but remained unchanged with MICT (from 23.1% to 21.9%, P = 0.444, with a significant intergroup difference, P = 0.003). Resting heart rate (24-hr Holter electrocardiography) decreased significantly for both groups (from 68.2 to 64.6 bpm and 66.0 to 63.5 bpm for MICT and HIIT, respectively, with no intergroup difference, P = 0.578). The 2 groups did not differ in premature ventricular contractions. Improvement in peak oxygen uptake was greater with HIIT than MICT (+ 21% vs. + 5%, P = 0.009). LVEF improved with only HIIT (from 36.2% to 39.5%, P = 0.034). Conclusions In this short rehabilitation program, HIIT was significantly superior to the classical MICT program for enhancing parasympathetic tone and peak oxygen uptake. Permalink : ./index.php?lvl=notice_display&id=84141 [article] Short-term effects of a 3-week interval training program on heart rate variability in chronic heart failure. A randomised controlled trial [texte imprimé] / Florent Besnier ; Marc Labrunée ; Lisa Richard ; Florence Faggianelli ; Hélène Kerros ; Laurent Soukarié ; Marc Bousquet ; Jean-Michel Sénard . - 2019 . - p. 321-328. doi.org/10.1016/j.rehab.2019.06.013 Langues : Anglais (eng) in Annals of physical and rehabilitation medicine > Vol. 62, n°5 (Septembre 2019) . - p. 321-328 Mots-clés : Exercise training  Cardiovascular  Rehabilitation  Chronic heart failure  Parasympathetic  Cardiorespiratory fitness Résumé : Background Exaggerated sympathetic nervous system activity associated with low heart rate variability (HRV) is considered to trigger cardiac arrhythmias and sudden death. Regular exercise training is efficient to improve autonomic balance. Objective We aimed to verify the superiority of high-intensity interval training (HIIT) to enhance HRV, cardiorespiratory fitness and cardiac function as compared with moderate intensity continuous training (MICT) in a short, intense cardiac rehabilitation program. Methods This was a prospective, monocentric, evaluator-blinded, randomised (1:1) study with a parallel two-group design. Overall, 31 individuals with voluntary chronic heart failure (CHF) (left ventricular ejection fraction [LVEF] < 45%) were allocated to MICT (n = 15) or HIIT (n = 16) for a short rehabilitation program (mean [SD] 27 [4] days). Participants underwent 24-hr electrocardiography, echocardiography and a cardiopulmonary exercise test at entry and at the end of the study. Results High-frequency power in normalized units (HFnu%) measured as HRV increased with HIIT (from 21.2% to 26.4%, P < 0.001) but remained unchanged with MICT (from 23.1% to 21.9%, P = 0.444, with a significant intergroup difference, P = 0.003). Resting heart rate (24-hr Holter electrocardiography) decreased significantly for both groups (from 68.2 to 64.6 bpm and 66.0 to 63.5 bpm for MICT and HIIT, respectively, with no intergroup difference, P = 0.578). The 2 groups did not differ in premature ventricular contractions. Improvement in peak oxygen uptake was greater with HIIT than MICT (+ 21% vs. + 5%, P = 0.009). LVEF improved with only HIIT (from 36.2% to 39.5%, P = 0.034). Conclusions In this short rehabilitation program, HIIT was significantly superior to the classical MICT program for enhancing parasympathetic tone and peak oxygen uptake. Permalink : ./index.php?lvl=notice_display&id=84141

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