A new study claims that obese older patients with a common type of heart failure can improve their ability to exercise without shortness of breath by either restricting calories or doing aerobic exercise. Heart failure with preserved ejection fraction (a measure of how well the left ventricle of the heart pumps with each contraction) is the most rapidly increasing form of heart failure. Exercise intolerance is the primary symptom of this chronic heart failure condition, and over 80% of patients with this condition are overweight or obese. In this small study, the authors found that peak Vo2 (volume of oxygen that an individual can use in one minute) increased significantly with either increased exercise or a healthier diet, and the combination of a healthy diet with exercise produced an even greater increase in exercise capacity.
Journal of the American Medical Association, January 2016