In the pathophysiological process of coronary artery disease (CAD), are present, autonomic dysfunction and reduced functional capacity. Studies showed that physical training (PT) is critical in the treatment of CAD by promoting beneficial effects. Although water based exercises program have been documented in patients with various cardiovascular diseases, the most of studies among patients with CAD used land based exercises programs. OBJECTIVE: To evaluate and compare the effects of aerobic water (WPT) and land (LPT) based PT on autonomic modulation of heart rate (HR), body composition and cardiorespiratory and metabolic variables in patients with CAD. METHODS : 40 men between 50 and 70 years old with CAD diagnosed by coronary angiography showing obstruction greater than 50% and underwent angioplasty will be evaluated in 4 stages; 1) immediately after angioplasty, clinical assessment, body composition analysis and recording of HR and NN intervals during rest. 2) The components of step 1) will be repeated after three month, adding the record of HR and NN before, during and after the Valsalva maneuver, spirometry and cardiopulmonary exercise testing. 3) Volunteers will be randomly divided into two groups, WPT and LPT for 48 sessions. 4) The components of step 2) are repeated after each period of 12 sessions. Thus, it is expected that WPT promote beneficial physiological adaptations in CAD patients with obstruction greater than 50%.