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Clinical Trial Summary

The investigators will assess the efficacy and safety of utilizing high-intensity interval training in stable heart failure patients on functional outcomes. Specifically, an assessment of baseline peak oxygen uptake and peak cardiac output will be assessed before and 8 weeks after intense interval training. Measurements of quality of life will be assessed before and after training as well as the number of arrhythmic events before and after training. The control group will be a group that will follow a moderate exercise training protocol over a similar period.


Clinical Trial Description

Aerobic exercise training of moderate intensity is recommended as safe and effective for all stable outpatients with chronic heart failure who are able to participate in improving physical conditioning. Emerging data suggest that high-intensity exercise training in select heart failure patients may achieve even greater improvement in functional capacity than moderate intensity training leading to a better quality of life. In the few studies to date, aerobic capacity, heart function is increased to a better extent in heart failure patients that undergo an eight-week high-intensity exercise program (32 exercise sessions) compared to the standard of care. The goal of this pilot study is to collect data on safety and efficacy of high-intensity interval training in stable heart failure patients to demonstrate better physiological and clinical outcomes with fewer long-term health care costs compared to the standard of care. Twenty participants with stable heart failure (age range = 40 to 65 years of age) will be randomized into two different groups: the standard of care group, in which subjects will exercise for 40 minutes at 40 to 60 % of heart rate reserve (HRR) for eight weeks (32 sessions); and the high-intensity interval training group, in which subjects will perform four sets of 4-minutes at > 85% of HRR, with three minutes of active rest between intervals, for six weeks (32 sessions). The functional outcomes measured will be cardiac function (i.e. stroke volume, cardiac output, ejection fraction), pulmonary function (diffusing capacity, lung volumes, spirometry), exercise capacity (peak oxygen uptake) at rest and during exercise before and after eight weeks of exercise training (32 sessions). Adverse events related to each exercise training session (i.e. cardiac arrest, myocardial infarction during exercise, or within the first hour afterward) as well as arrhythmias will be recorded via Holter monitoring 24-hrs post-exercise. Quality of life will also be measured. The exercise training will be supervised at Grady Hospital. This novel approach has the chance to become impactful to these patients and will challenge the current negative perception of high-intensity exercise training in this patient population. The investigators anticipate this study will help reform the current exercise guidelines in these participants. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03032081
Study type Interventional
Source Georgia State University
Contact
Status Withdrawn
Phase N/A
Start date March 2, 2017
Completion date July 1, 2018

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