Patients with poor inspiratory muscle function might show significant orthopnea and prefer to sleep in a prone position.

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Poor inspiratory muscle function can result in difficulty breathing while lying down, which can be alleviated by sleeping in a more upright position, such as sitting up or sleeping in a prone position. Therefore, patients with poor inspiratory muscle function may prefer to sleep in a prone position.

Patients with Poor Inspiratory Muscle Function Might Show Significant Orthopnea