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Effect of High-Intensity Interval Training, Moderate Continuous Training, or Guideline-Based Physical Activity Advice on Peak Oxygen Consumption in Patients With Heart Failure With Preserved Ejection Fraction: A Randomized Clinical Trial.
Mueller, S, Winzer, EB, Duvinage, A, Gevaert, AB, Edelmann, F, Haller, B, Pieske-Kraigher, E, Beckers, P, Bobenko, A, Hommel, J, et al
JAMA. 2021;325(6):542-551
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Heart failure with preserved ejection fraction (HFpEF) is a condition in which the heart's lower left chamber is less able to pump blood due to stiffness. The prevalence of HFpEF is high among the elderly. Endurance exercise is known to increase peak oxygen consumption (Vo2). This prospective, randomised, controlled, three-armed, multi-centre trial aimed to understand the effects of endurance training in older people with HFpEF at 3 and 12 months. In this study, 180 sedentary patients with HFpEF were randomly assigned to high-intensity interval training, moderate continuous training, or control of home-based tele-guideline physical activity advice. The study found no statistically significant difference in changes in V̇o2 between high-intensity interval and moderate continuous training, and neither group met the clinically significant difference of 2.5 mL/kg/min compared with the guideline control. Diastolic function or natriuretic peptides did not change significantly in any group. Adherence level was lower among elderly patients, and there were serious adverse effects in patients with HFpEE. Healthcare professionals can use the findings of this study to understand the impact and adverse effects of endurance training at different intensities in patients with HFpEE.
Abstract
Importance: Endurance exercise is effective in improving peak oxygen consumption (peak V̇o2) in patients with heart failure with preserved ejection fraction (HFpEF). However, it remains unknown whether differing modes of exercise have different effects. Objective: To determine whether high-intensity interval training, moderate continuous training, and guideline-based advice on physical activity have different effects on change in peak V̇o2 in patients with HFpEF. Design, Setting, and Participants: Randomized clinical trial at 5 sites (Berlin, Leipzig, and Munich, Germany; Antwerp, Belgium; and Trondheim, Norway) from July 2014 to September 2018. From 532 screened patients, 180 sedentary patients with chronic, stable HFpEF were enrolled. Outcomes were analyzed by core laboratories blinded to treatment groups; however, the patients and staff conducting the evaluations were not blinded. Interventions: Patients were randomly assigned (1:1:1; n = 60 per group) to high-intensity interval training (3 × 38 minutes/week), moderate continuous training (5 × 40 minutes/week), or guideline control (1-time advice on physical activity according to guidelines) for 12 months (3 months in clinic followed by 9 months telemedically supervised home-based exercise). Main Outcomes and Measures: Primary end point was change in peak V̇o2 after 3 months, with the minimal clinically important difference set at 2.5 mL/kg/min. Secondary end points included changes in metrics of cardiorespiratory fitness, diastolic function, and natriuretic peptides after 3 and 12 months. Results: Among 180 patients who were randomized (mean age, 70 years; 120 women [67%]), 166 (92%) and 154 (86%) completed evaluation at 3 and 12 months, respectively. Change in peak V̇o2 over 3 months for high-intensity interval training vs guideline control was 1.1 vs -0.6 mL/kg/min (difference, 1.5 [95% CI, 0.4 to 2.7]); for moderate continuous training vs guideline control, 1.6 vs -0.6 mL/kg/min (difference, 2.0 [95% CI, 0.9 to 3.1]); and for high-intensity interval training vs moderate continuous training, 1.1 vs 1.6 mL/kg/min (difference, -0.4 [95% CI, -1.4 to 0.6]). No comparisons were statistically significant after 12 months. There were no significant changes in diastolic function or natriuretic peptides. Acute coronary syndrome was recorded in 4 high-intensity interval training patients (7%), 3 moderate continuous training patients (5%), and 5 guideline control patients (8%). Conclusions and Relevance: Among patients with HFpEF, there was no statistically significant difference in change in peak V̇o2 at 3 months between those assigned to high-intensity interval vs moderate continuous training, and neither group met the prespecified minimal clinically important difference compared with the guideline control. These findings do not support either high-intensity interval training or moderate continuous training compared with guideline-based physical activity for patients with HFpEF. Trial Registration: ClinicalTrials.gov Identifier: NCT02078947.
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An internet-based self-administered intervention for promoting healthy habits and weight loss in hypertensive people who are overweight or obese: a randomized controlled trial.
Banos, RM, Mensorio, MS, Cebolla, A, Rodilla, E, Palomar, G, Lisón, J, Botella, C
BMC cardiovascular disorders. 2015;15:83
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Overweight and obesity are chronic conditions that have been linked with an increased risk of developing hypertension. Healthy lifestyle habits around eating behaviour and physical activity are known to help counteract these conditions. The aim of this study will be to evaluate whether an self-administered internet-based programme targeting eating behaviour and physical activity levels can help improve disease markers in hypertensive obese patients. The internet-based programme consisted of nine modules designed to promote healthy eating and increased physical activity. A randomised trial will be conducted with 100 hypertensive patients and participants will be randomised to either receive the online programme or usual medical care for three months. Patients will be assessed at baseline, three months, six months and one year for blood pressure and body mass index, as well as quality of life measures. The authors conclude the current literature highlights the need for more studies on the benefits of using internet-based lifestyle interventions, and suggests this protocol will provide a starting point for developing cost-effective healthy lifestyle interventions.
Abstract
BACKGROUND The prevalence of overweight and obesity is on the rise worldwide with severe physical and psychosocial consequences. One of the most dangerous is hypertension. Lifestyle changes related to eating behaviour and physical activity are the critical components in the prevention and treatment of hypertension and obesity. Data indicates that the usual procedures to promote these healthy habits in health services are either insufficient or not efficient enough. Internet has been shown to be an effective tool for the implementation of lifestyle interventions based on this type of problem. This study aims to assess the efficacy of a totally self-administered online intervention programme versus the usual medical care for obese and overweight participants with hypertension (from the Spanish public health care system) to promote healthy lifestyles (eating behaviour and physical activity). METHOD A randomized controlled trial will be conducted with 100 patients recruited from the hypertension unit of a public hospital. Participants will be randomly assigned to one of two conditions: a) SII: a self-administered Internet-based intervention protocol; and b) MUC-medical usual care. The online intervention is an Internet-delivered, multimedia, interactive, self-administered programme, composed of nine modules designed to promote healthy eating habits and increase physical activity. The first five modules will be activated at a rate of one per week, and access for modules 5 to 9 will open every two weeks. Patients will be assessed at four points: before the intervention, after the intervention (3 months), and at 6 and 12 months (follow-up). The outcome variables will include blood pressure, and Body Mass Index, as primary outcome measures, and quality of life and other lifestyle and anthropometrical variables as secondary outcome measures. DISCUSSION The literature highlights the need for more studies on the benefits of using the Internet to promote lifestyle interventions. This study aims to investigate the efficiency of a totally self-administered Internet - +based programme for promoting healthy habits and improving the medical indicators of a hypertensive and overweight population. TRIAL REGISTRATION NCT02445833.