Strength in breath: respiratory metaboreflex response to training and detraining

Murphy, Ben T.; O’Halloran, Ken D.

doi:10.1113/ep091098

Cited by 1 publication

(1 citation statement)

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“…IMT aims to improve the strength and endurance of inspiratory muscles: the diaphragm and accessory muscles [6,7]. It is known that improving respiratory muscle strength and endurance delays the respiratory muscle metaboreflex, a physiological response hyperactivated in patients with CVD, occurring during physical exercise when metabolites, for instance, lactate, adenosine and hydrogen ions, accumulate in muscles [8]. This accumulation triggers the metaboreflex that redirects the blood flow via sympathetic activation from the periphery muscles to the diaphragmatic area, thus avoiding dyspnoea due to reduction in blood supply to respiratory muscles.…”

Section: Introductionmentioning

confidence: 99%

Inspiratory Muscle Training Intensity in Patients Living with Cardiovascular Diseases: A Systematic Review

Beaujolin,

Mané,

Presse

et al. 2024

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The benefits of inspiratory muscle training (IMT) have been demonstrated in patients with cardiovascular diseases (CVD); however, the optimal training intensity is not yet fully clarified. The purpose of this study was to review the impact of IMT intensity on respiratory muscle strength, functional and exercise capacity, pulmonary function, and quality of life in patients with CVD. This systematic review was carried out according to PRISMA statement and registered in the PROSPERO database (review protocol: CRD42023442378). Randomized controlled trials were retrieved on 3 July 2023 in the following electronic databases: Web of Science, PubMed, EMBASE, and SCOPUS. Studies were included if they assessed the impact of isolated IMT on CVD patients in comparison with sham, different intensities and/or intervention groups. Eight studies were included for final analysis; IMT consistently led to significantly greater improvements in inspiratory muscle strength compared to control (CON) groups. The intensity of IMT varied in the studies based on different percentages of maximal inspiratory pressure (MIP), ranging from 25% to 60% of MIP. The time of intervention ranged from 4 to 12 weeks. Despite this variability, the studies collectively suggested that IMT is beneficial for enhancing CVD patients’ conditions. However, the optimal intensity range for benefits appeared to vary, and no single intensity emerged as universally superior across all studies.

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Section: Introductionmentioning

confidence: 99%