Heart Disease Clinical Trial
Official title:
A Randomised Controlled Trial on the Efficacy of High Intensity Interval Training Compared With Moderate Intensity Interval Training for Patients Undergoing Cardiac Rehabilitation
Cardiac rehabilitation is a program designed to help patients regain good health through
lifestyle change after a heart attack, heart surgery or other heart problems. Patients will
take part in exercise sessions and education lessons, tailored to meet their personal needs.
The exercise training component of cardiac rehabilitation may be delivered as intervals of
short intense sessions (also known as high intensity intervals) or the current standard care
of longer but less intense sessions (moderate intense intervals). Both exercises have been
shown to increase fitness levels and also prevent future risk of heart disease.
The purpose of this study is to determine the efficacy and safety of high intensity interval
exercise training (HIIT) in patients who had a recent cardiac revascularization procedure or
recovering from a heart attack, in comparison to current standard of moderate intensity
exercise training in terms of their physical fitness and psychological well-being.
Cardiac rehabilitation is an eight week program designed to help patients regain good health
through changed lifestyle after a possible heart attack, heart surgery or other heart
problems. Patients will take part in exercise sessions and education lessons, tailored to
meet their personal needs. The exercise training component of cardiac rehabilitation may be
delivered as intervals of short intense sessions (also known as high intensity intervals) or
the current standard care of longer but less intense sessions (moderate intense intervals).
Both exercises have been shown to increase fitness levels and also prevent future risk of
heart disease. Although there is some evidence to suggest that high intensity interval
training produces better body muscles recovery and fitness during cardiac rehabilitation,
many important health outcomes have not yet been determined. Such outcomes include the
ability of the body to safely control blood pressure and heartbeat rate. Others include
health-related quality of life and emotional well-being.
This study will explore whether there are any differences in health outcomes before and
after the introduction of the intervention for patients undergoing high intensity interval
exercise compared to those on moderate intensity interval exercise in terms of the recovery
of the ability to control blood pressure and heartbeat rate, and also health-related quality
of life and emotional well-being. In addition, patients' opinions will be sought regarding
pain levels, the acceptability and the extent of enjoyment they get from each of the two
types of exercise training.
For each patient, their exercise program will be designed to match their preferences and
requirements. Some may prefer to work in a gym environment and so will have their program
designed around this type of activity. Others may prefer to work in a group exercise
circuit, with their program matched to what is available. When comparing the two types of
exercise, everything will be kept the same; from the warm up and cool down, to the types of
movements; the only thing that will change is the intensity of the exercise.
Before and after the eight week training program, patients will be asked to have an
assessment to measure the effects that the exercise has on their body. Things like heart
rate and blood pressure will be taken and they will also undergo a physical fitness test.
After the training, patients will complete questionnaires to establish their level of
enjoyment of the program, how motivated they were to complete it. In addition, their quality
of life and emotional well-being will be measured by completing questionnaires before and
after the 8 weeks of the cardiac rehabilitation program. The investigators anticipate that a
total of 46 patients will be recruited for the study over a period of 6 months. In the
United Kingdom, it is believed that delivering an improved exercise training program has the
potential to enhance patients' recovery from heart disease that may reduce the need for
hospital services and therefore a better use of the National Health Service resources.
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Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
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