Effects of High-intensity Interval Training vs. Moderate Intensity Continuous Exercise in Cardiac Rehabilitation Patients

Cardiac rehabilitation is a key component in the secondary prevention of cardiovascular disease. However, uptake and adherence to programmes is suboptimal, especially for patients with heart failure. Traditionally, cardiac rehabilitation programmes have involved moderate-intensity continuous training; however, there is growing evidence that high-intensity interval training can produce equal or superior effects in both healthy and diseased populations. High-intensity interval training has already been shown to be both safe and effective, but the optimal protocols and delivery mechanisms are yet to be determined. Despite this, high-intensity interval training has the potential to offer an alternative mechanism of cardiac rehabilitation delivery to patients with heart failure, with the possibility of overcoming some of the challenges usually faced (such as patients' lack of time) in implementing successful cardiac rehabilitation programmes. This article aims to summarise the current knowledge surrounding the inclusion of high-intensity interval training in cardiac rehabilitation programmes, specifically focusing on those patients living with heart failure.

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High Intensity Interval Training or Moderate Intensity Continuous Exercise in Patients with Myocardial Infarction?

Arab Journal of Nutrition and Exercise (AJNE) ◽

10.18502/ajne.v2i2.1247 ◽

2017 ◽

Vol 2 (2) ◽

pp. 74

Author(s):

Irene C. Themistocleous ◽

Manos Stefanakis

Keyword(s):

Quality Of Life ◽

Myocardial Infarction ◽

Functional Capacity ◽

High Intensity ◽

Interval Training ◽

Moderate Intensity ◽

High Intensity Interval Training ◽

Continuous Exercise ◽

High Intensity Interval

Objectives: To determine the effects of high intensity interval training (HIIT) or moderate intensity continuous exercise (MICE) in patients with myocardial infarction (MI). Background: Cardiovascular diseases are the leading cause of mortality and morbidity globally causing a significant reduction in the quality of life of these patients. Participation of these patients in rehabilitation programs which involve a significant component of exercise seems to help by improving functional capacity and quality of life (QoL). Despite the beneficial effect of exercise, the type of exercise that yields the best results is yet to be determined.Methods: Three databases (MEDLINE, CINHAL and SportDirect) were searched in May-June 2017 for original articles regarding the effect of two types of exercise in patients with myocardial infarction. Randomized control trial studies which enrolled patients with myocardial infarction and studied the effects of HIIT and/or MICE, were included in this review. Data were extracted and summarised and all studies were assessed for bias.Results: Both forms of exercise seem to improve the relevant outcome measures such as functional capacity, QoL, walking distance, fatigue and function of the left heart. However HIIT seemed to be better in comparison with MICE in improving these outcomes. Several limitations and risk of bias have been identified and reported.Conclusion: Both HIIT and MICE are recommended for patients with MI. Further research is required to conclusively support the superiority of HIIT over other types of exercise.

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