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Not yet recruiting NCT07619664

High-Intensity Interval Training vs Moderate-Intensity Continuous Training in Phase II Cardiac Rehabilitation

No phase Interventional Coronary Artery Disease

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: High-Intensity Interval Training, Moderate-Intensity Continuous Training.
Who it may be relevant to
Registry conditions: Coronary Artery Disease. Basic parameters: 18 years — 60 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
Pakistan
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Effects of High-Intensity Interval Training vs Moderate-Intensity Continuous Training on Ejection Fraction, Functional Capacity, and Lipid Profiles in Phase II Cardiac Rehabilitation

Overview

This randomized controlled trial aims to compare the effects of High-Intensity Interval Training (HIIT) and Moderate-Intensity Continuous Training (MICT) in patients undergoing Phase II cardiac rehabilitation after coronary artery disease or post-angioplasty. A total of 66 participants will be randomly allocated into two groups: HIIT (n=33) and MICT (n=33). The intervention will be conducted 3 times per week using treadmill-based exercise protocols under heart rate monitoring. Primary outcomes include changes in left ventricular ejection fraction, functional capacity measured by 6-minute walk test, and lipid profile parameters before and after intervention. Secondary assessment includes health-related quality of life (HRQoL). The study aims to determine which exercise modality provides superior cardiovascular and functional improvement in stable cardiac patients during supervised rehabilitation.

Detailed description

This randomized controlled trial will compare the effects of High-Intensity Interval Training (HIIT) and Moderate-Intensity Continuous Training (MICT) in patients undergoing Phase II cardiac rehabilitation after stable coronary artery disease or post-angioplasty. A total of 66 participants will be randomly assigned into two groups.

The HIIT group will perform treadmill-based interval exercise 3 times per week at 85-95% heart rate reserve with active recovery periods, while the MICT group will perform continuous treadmill exercise at 65-75% heart rate reserve for 30-45 minutes.

Primary outcomes include left ventricular ejection fraction (echocardiography), functional capacity (6-minute walk test), and lipid profile (LDL, HDL, triglycerides, total cholesterol) measured before and after intervention. Health-related quality of life (HRQoL) will also be assessed. The study aims to determine which exercise protocol produces greater improvement in cardiac and functional outcomes.

Interventions

  • Behavioral High-Intensity Interval Training
    Participants will perform supervised treadmill-based high-intensity interval training 3 times per week. Each session includes 10 minutes warm-up, 4 intervals of 4 minutes at 85-95% heart rate reserve, 4 minutes active recovery at 50-60% heart rate reserve, followed by 5 minutes cool-down.
  • Behavioral Moderate-Intensity Continuous Training
    Participants will perform supervised treadmill-based continuous exercise 3 times per week at 65-75% heart rate reserve for 30-45 minutes, including warm-up and cool-down periods.

Primary outcome measures

  • Left Ventricular Ejection Fraction [Time frame: Baseline and at 12 weeks after intervention]
  • Functional Capacity [Time frame: Baseline and at 12 weeks after intervention]
Secondary outcome measures (1)
  • Lipid Profile [Time frame: Baseline and at 12 weeks after intervention]

Eligibility criteria

Inclusion criteria

  • Adults aged 18-60 years.
  • Diagnosed with stable coronary artery disease confirmed by angiography, stress testing, or echocardiography.
  • Left ventricular ejection fraction ≥45%.
  • Functional NYHA Class I or II.
  • Medically cleared by a cardiologist to participate in exercise (including recent ECG or stress test if necessary).
  • Lightly active lifestyle prior to study (not involved in structured exercise programs).

Exclusion criteria

  • Unstable angina or recent myocardial infarction (within the past 6 weeks).
  • Uncontrolled hypertension (systolic BP >180 mmHg or diastolic BP >110 mmHg).
  • Severe valvular heart disease, arrhythmias, or left ventricular dysfunction (EF <35%).
  • Musculoskeletal disorders (e.g., severe osteoarthritis, recent fractures, or surgeries) preventing safe participation in exercise.
  • Neurological disorders affecting mobility or safe exercise (e.g., stroke, Parkinson's disease).
  • Uncontrolled diabetes mellitus (HbA1c >9% or recent hypoglycemia).
  • Any other condition judged by the investigator to make participation unsafe.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation
Randomized
Model
Parallel assignment
Masking
Open label
Primary purpose
Treatment

Study locations

Pakistan · 1 center
  • Ch Pervaiz Elahi institute of cardiology Multan. — Multan

Identifiers

NCT: NCT07619664 · REC/RCR & AHS/25/0320

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗