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Electrophysiologic changes with incremental exercise in obstructive sleep apnea
Author(s) -
Chien MengYueh,
Chang YaJu,
Lee Peilin,
Yang PanChyr,
Wu YingTai
Publication year - 2013
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.23745
Subject(s) - medicine , electromyography , obstructive sleep apnea , apnea , cardiology , motor unit , peripheral , physical therapy , motor unit recruitment , anesthesia , physical medicine and rehabilitation , anatomy
In patients with obstructive sleep apnea (OSA), intermittent apnea and hypopnea might cause different adaptations in inspiratory and peripheral muscles. In this study we aimed to determine the changes that occur in muscle activation characteristics during incremental exercise testing in patients with severe OSA. Surface electromyography of inspiratory muscles and knee extensors was performed. Methods Eleven men with severe OSA and 11 matched controls were recruited. Changes in muscle activity were compared by determining root mean square (RMS) and median power frequency (MPF) values obtained at different exercise intensities. Results The ratios of RMS to oxygen consumption in inspiratory muscles and vastus lateralis increased significantly at peak workload in the control group ( P < 0.05), but not in the OSA group. Conclusions Patients with severe OSA demonstrated an inability to increase motor unit recruitment of inspiratory muscles and knee extensors during incremental exercise. Muscle Nerve , 48: 212–218, 2013