Inspiratory Muscle Training in Heart Failure as a Promising Tool in the Heart Failure Toolkit: From Physiology to Practice

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Abstract
Heart failure (HF) is a heterogeneous clinical syndrome with increasing prevalence among adults worldwide. It is characterized by complex central and peripheral alterations that contribute to exercise intolerance, fatigue, dyspnea, and reduced quality of life. Inspiratory muscle weakness (IMW) plays a key role in this vicious cycle by exacerbating symptoms and further limiting functional capacity. Inspiratory muscle training (IMT) has emerged as a potential adjuvant in comprehensive HF management and is a physiologically grounded and promising tool in the contemporary HF therapeutic toolkit. Its integration into multimodal rehabilitation programs may mitigate the cycle of dyspnea and deconditioning in patients with HF. On this basis, we provide an overview of the pathophysiological mechanisms underlying IMW and present the practical characteristics of IMT programs, synthesizing current evidence regarding its clinical efficacy and implementation challenges.

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