Long-term high-intensity interval training associated with lifestyle modifications improves QT dispersion parameters in metabolic syndrome patients

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Serval ID
serval:BIB_0CF90C541D7C
Type
Article: article from journal or magazin.
Collection
Publications
Title
Long-term high-intensity interval training associated with lifestyle modifications improves QT dispersion parameters in metabolic syndrome patients
Journal
Ann Phys Rehabil Med
Author(s)
Drigny J., Gremeaux V., Guiraud T., Gayda M., Juneau M., Nigam A.
ISSN
1877-0665 (Electronic)
ISSN-L
1877-0657
Publication state
Published
Issued date
07/2013
Volume
56
Number
5
Pages
356-70
Language
english
Notes
Drigny, J
Gremeaux, V
Guiraud, T
Gayda, M
Juneau, M
Nigam, A
eng
Netherlands
Ann Phys Rehabil Med. 2013 Jul;56(5):356-70. doi: 10.1016/j.rehab.2013.03.005. Epub 2013 Apr 17.
Abstract
BACKGROUND: QT dispersion (QTd) is a marker of myocardial electrical instability, and is increased in metabolic syndrome (MetS). Moderate intensity continuous exercise (MICE) training was shown to improve QTd in MetS patients. OBJECTIVES: To describe long-term effects of MICE and high-intensity interval exercise training (HIIT) on QTd parameters in MetS. METHODS: Sixty-five MetS patients (53 +/- 9 years) were assigned to either a MICE (60% of peak power output [PPO]), or a HIIT program (alternating phases of 15-30 s at 80% of PPO interspersed by passive recovery phases of equal duration), twice weekly during 9 months. Ventricular repolarization indices (QT dispersion=QTd, standard deviation of QT = sdQT, relative dispersion of QT = rdQT, QT corrected dispersion = QTcd), metabolic, anthropometric and exercise parameters were measured before and after the intervention. RESULTS: No adverse events were noted during exercise. QTd decreased significantly in both groups (51 vs 56 ms in MICE, P < 0.05; 34 vs 38 ms in HIIT, P < 0.05). Changes in QTd were correlated with changes in maximal heart rate (r = -0.69, P < 0.0001) and in heart rate recovery (r = -0.49, P < 0.01) in the HIIT group only. When compared to MICE, HIIT training induced a greater decrease in weight, BMI and waist circumference. Exercise capacity significantly improved by 0.82 and 1.25 METs in MICE and HIIT groups respectively (P < 0.0001). Lipid parameters also improved to the same degree in both groups. CONCLUSION: In MetS, long-term HIIT and MICE training led to comparable effects on ventricular repolarization indices, and HIIT might be associated with greater improvements in certain cardiometabolic risk factors.
Keywords
Adult, Body Mass Index, Cholesterol, HDL/blood, Cholesterol, LDL/blood, Electrocardiography, Heart/*physiopathology, Heart Rate, Humans, *Life Style, Metabolic Syndrome/blood/*physiopathology/*rehabilitation, Middle Aged, Physical Conditioning, Human/methods/*physiology, Retrospective Studies, Time Factors, Triglycerides/blood, Waist Circumference, Weight Loss, Cardiometabolic risk, Entrainement par intervalles, Exercice, Exercise, Interval exercise training, Metabolic syndrome, Repolarisation ventriculaire, Risque cardiometabolique, Syndrome metabolique, Ventricular repolarization
Pubmed
Create date
26/11/2019 12:35
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06/05/2020 6:26
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