Short and Fast Step Test: Feasibility, Validity and Tolerance of a Functional Evaluation Test of Lactic Anaerobic Capacities in Patients With Coronary Artery Disease

Inclusion Criteria: \- Patient who has given oral consent Adult patient (male or female) with coronary artery disease without heart failure referred for rehabilitation program Left ventricular ejection fraction (Simpson method) \> 45%. Exclusion Criteria: * Protected adult * Patient not affiliated to a national health insurance scheme * Pregnant or breastfeeding woman * Orthostatic hypotension * Severe obstructive heart disease * aortic valve narrowing * Progressive severe cardiac rhythm or conduction disorders not requiring a device, detected during the initial stress test. * intracavitary cardiac thrombus * severe pulmonary arterial hypertension (systolic pulmonary hypertension \>70mmHg) * recent venous thromboembolic history (last 3 months) * heart transplantation * associated medical condition that can predominantly impair functional and respiratory capacities (examples: unstabilized metabolic disorders such as progressive renal failure, significant asthenia related to a severe unstabilized condition such as neoplasia, systemic disease, chronic obstructive pulmonary disease...) * physical impairments of the lower limbs hindering the test, whether neurological (central or peripheral), arterial (in particular, arteriopathy of the lower limbs with systolic index \< 0.6) or orthopedic (degenerative or inflammatory rheumatism) * Treatment with Corticosteroids, Anabolics, or L-Carnitine.