Key result
Inspiratory resistance breathing increases dyspnea, linked to accessory respiratory muscle recruitment rather than the diaphragm.
Why the study?
Does breathing against an inspiratory resistance alter respiratory muscle recruitment and increase dyspnea in normal subjects?
Observational (n=18)
Does breathing against an inspiratory resistance alter respiratory muscle recruitment and increase dyspnea in normal subjects?
In normal subjects, the sensation of dyspnea during inspiratory resistance breathing is associated with accessory respiratory muscle recruitment rather than diaphragm recruitment.
Answers are grounded in this paper and cite their sources.
Highlights accessory muscle role in resistance-induced dyspnea in healthy subjects; hypothesis-generating for mechanisms in clinical populations.
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Breslin et al. (1990) conducted an observational in Normal subjects (n=18). Inspiratory resistance breathing vs. Normal controlled breathing was evaluated on Relationship between recruitment of diaphragm and sternomastoid muscles, pattern of respiratory muscle recruitment, and intensity of dyspnea. Inspiratory resistance breathing markedly increased dyspnea, which was associated with the recruitment of accessory respiratory muscles rather than the diaphragm.
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