Background: Repeated exposure to intermittent normobaric hypoxia improves exercise tolerance in cardiac patients. Little is known on the effects of intermittent normobaric hypoxia-hyperoxia exposure in coronary artery disease (CAD) patients (New York Heart Association II-III). Hypothesis: IHHT improves exercise tolerance, cardiometabolic profile, and quality of life in CAD patients. Methods: The study design was a nonrandomized, controlled, before-and-after trial. Forty-six CAD patients volunteered to take…