* To determine the effects of moderate intensity exercise vs high intensity interval training on functional capacity in women with heart failure * To determine the effects of moderate intensity exercise vs high intensity interval training on quality of life in women with heart failure
Women aged 40-70 years, diagnosed with Stable Heart Failure (NYHA class II or III).
Clinically stable patients referred for exercise-based cardiac rehabilitation by the physician.
Able to perform exercise testing (able to walk 150 meters on the six-minute walk test) before starting the program.
Women willing to participate and provide informed consent.
Unstable Heart failure or myocardial infarction (< 4 weeks).
Severe arrhythmias, uncontrolled hypertension, or ongoing chest pain during exercise.
Orthopedic, neurological, or cognitive limitations preventing safe exercise participation.
Any medical contraindication to exercise testing.