The impact of high-intensity inspiratory muscle training on exercise capacity and inspiratory muscle strength in heart failure with reduced ejection fraction: a systematic review and meta-analysis.

Inspiratory muscle training (IMT) improves prognostic clinical variables in patients with heart failure. However, the optimal intensity for increasing those outcomes remains unclear. Thus, we aimed to determine whether high-intensity inspiratory muscle training (HIIMT) improves exercise capacity and respiratory muscle strength in patients with heart failure with reduced ejection fraction (HFrEF).