Inclusion Criteria:  Age ≥ 45 years  Diagnosis of HFpEF  LVEF > 40% by any imaging modality at screening within 4 months prior to study entry Current HF symptoms as defined as presence of dyspnea according to New York Heart Association [NYHA] functional class I to III at screening visit Stable HF treatment for at least 4 weeks prior to screening At least one of the following 3 criteria need to be fulfilled: (1) NT-proBNP ≥ 300pg/ml; (2) Hospitalization for HF within the past 12 months; (3) Symptom(s) of HF requiring treatment with diuretic(s) for at least 30 days prior to screening visit Wearing time of the physical activity monitor for at least 4 days during the baseline assessment Average daily step count during baseline assessment ≥ 1,000 steps per day and < 10,000 steps per day  Exclusion Criteria:  Acute decompensated HF requiring augmented therapy with diuretic agents, vasodilator agents, and/or inotropic drugs Participants who are non-ambulatory managed or use mobility assistive devices such as motorized devices or wheelchairs Acute coronary syndrome (including myocardial infarction), cardiac surgery, other major cardiovascular surgery or urgent percutaneous coronary intervention (PCI) within 3 months prior to visit 1 or an elective PCI within 30 days after study enrolment Probable alternative diagnoses that in the opinion of the investigator account for the patient's HF symptoms (i.e., dyspnea, fatigue)  Participants with physical activity impairment primarily due to conditions other than HF such as:  Participants unwilling or unable to wear or to operate study measurement devices for the phases required Exertional angina Inflammatory or degenerative joint disease Peripheral vascular disease Neurologic disease affecting activity or mobility (e.g. peripheral neuropathy) Foot ulcer (e.g. diabetic foot syndrome) Prosthetic limbs Current chemotherapy and/or radiation therapy for treatment of active cancer Medical or psychological conditions that would jeopardize an adequate and orderly conduct or completion of the study