Inclusion Criteria:  Coronary artery disease patient from the Montreal Heart Institute Age> 18 years old Referred to the EPIC center in a cardiovascular rehabilitation program due to stable angina pectoris, acute coronary syndrome (with or without ST segment elevation) or after complete coronary revascularization (primary or elective) by Percutaneous Coronary Intervention. Able to perform a maximal cardiopulmonary exercise stress test in accordance with current cardiovascular rehabilitation recommendations. Able to read, understand and sign the information and consent form.  Exclusion Criteria:  Any absolute and relative contraindication to the maximal exercise test and / or physical activity. Recent cardiovascular events (cardiac decompensation or treatment with positive inotropic drugs or angioplasty less than 10 days, cardiac surgery less than 1 month, valve disease requiring surgical correction, active myopericarditis, severe ventricular arrhythmias not stabilized under treatment). Revascularization by coronary artery bypass grafting Atrial fibrillation Renal failure Heart failure Diabetes