Effects of exercise training on physical activity in heart failure patients treated with cardiac resynchronization therapy devices or implantable cardioverter defibrillators

Objective: This study elucidated the effects of exercise training on physical activity, 6-min walk distance, and all-cause hospitalization rates in patients with chronic heart failure, and evaluated factors contributing to changes in physical activity. Design: Prospective cohort observational study. Patients and methods: Patients (n =62) who completed an exercise training programme after implantable cardioverter-defibrillator or cardiac resynchronization therapy treatment between May 2017 and May 2018 were included. Patients exercised for 20–50 min 3–5 times weekly for 3 months and were assigned to the active (≥ 10 min/day) or non-active (