Effects of high intensity interval-based inspiratory muscle training in patients with heart failure: A single-blind randomized controlled trial

•Inspiratory muscle weakness is demonstrated in most patients with heart failure.•It is important to define the most appropriate inspiratory muscle training protocol.•H-IMT protocol has not been investigated yet in patients with heart failure.•H-IMT improves cardiac autonomic function in patients with heart failure.•H-IMT decreases arterial stiffness in patients with heart failure.