Tailored Exercise Training Study Among Adults With HFpEF

This study is looking at whether a personalized exercise training program can help adults with heart failure with preserved ejection fraction (HFpEF) — a type of heart failure where the heart pumps normally but is too stiff to fill properly. Participants will use a mobile app to track their progress and adjust their exercise plan. **You may be eligible if...** - You are 18 years or older - You have been diagnosed with HFpEF, or you have several risk factors for it (such as diabetes, high blood pressure, obesity, or physical inactivity) - Your heart's pumping function (ejection fraction) is 50% or above - You have limitations in physical function or lower-than-expected fitness based on testing - You have a BMI of 28 or above (for the main study phase) - You are able to use a smartphone and a mobile app **You may NOT be eligible if...** - You were hospitalized in the past month - You have a history of frequent falls - Your kidney function is severely reduced (eGFR below 20) - You are pregnant - You are unable to exercise or cannot complete a fitness test - You have severe heart valve disease or end-stage lung disease requiring continuous oxygen Talk to your doctor to see if this trial is right for you.