A Study to Compare the Effectiveness of Different High-intensity Interval Training Programs in Cardiac Rehabilitation

Efficacy of Prescription Methods for High-intensity Interval Training in Patients Enrolled in Outpatient Cardiac Rehabilitation

The purpose of the study is to examine the effect of two different high intensity interval training (HIIT) prescription approaches on improving fitness, heart function, and the ability of the body's muscles to receive oxygen.

Inclusion Criteria:

• Adult 18 years and older.
• English speaking.
• Able to provide consent.
• Has a qualifying indication for center-based cardiac rehabilitation that is non-surgical (i.e., Acute coronary syndrome, myocardial infarction, percutaneous coronary intervention, and stable angina).

Exclusion Criteria:

• Participants referred to cardiac rehabilitation following coronary artery bypass surgery, heart valve repair/replacement, heart transplant, or those with ventricular assist devices.
• Patients who are unable to engage in a regularly structured exercise training program as part of a clinically indicated center-based outpatient cardiac rehabilitation program are not eligible.
• Patients unable/unwilling to provide informed consent will not be enrolled.
• Patients identified as having a contraindication to high intensity exercise.