High Intensity Interval Training Versus Moderate Continuous Training in Heart Failure With Preserved Ejection Fraction

The HIIT group will warm up for 10 minutes at 60% to 70% of peak heart rate(50% to 60% of V̇O2peak) before walking four 4-minute intervals at 85% to 95% of peak heart rate. Each interval will be separated by 3-minute active pauses, walking at 60% to 70% of peak heart rate. The training session will be terminated by a 3-minute cool-down at 60% to 70% of peak heart rate. Total exercise time will be 38 minutes for the HIIT group. Patients will perform 3 training sessions per week for 12 consecutive weeks.

The moderate continuous training (MCT) group will undergo treadmill walking continuously at 60% to 70% of peak heart rate for 47 minutes each session to make sure the training protocols will be isocaloric. Patients will perform 3 training sessions per week for 12 consecutive weeks.