Inclusion Criteria:  adults ages 50-85, type 2 diabetes mellitus, and clinical heart failure with ejection fraction > 50%  Exclusion Criteria:  previous hypersensitivity or adverse reaction to SGLT-2 inhibitors, currently treated with SGLT-2 inhibitor, ejection fraction <50%, chronic kidney disease with glomerular filtration rate < 45 ml/kg/min, unstable coronary artery disease, significant arrhythmia, BMI >55 kg/m2 and inability to exercise.