Electrophysiologic changes with incremental exercise in obstructive sleep apnea

Meng Yueh Chien; Ya Ju Chang; Peilin Lee; Pan Chyr Yang; Ying Tai Wu

doi:10.1002/mus.23745

Electrophysiologic changes with incremental exercise in obstructive sleep apnea

Meng Yueh Chien, Ya Ju Chang, Peilin Lee, Pan Chyr Yang, Ying Tai Wu^*

^*Corresponding author for this work

School of Physical Therapy

National Taiwan University

Research output: Contribution to journal › Journal Article › peer-review

7 Scopus citations

Abstract

Introduction: 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.

Original language	English
Pages (from-to)	212-218
Number of pages	7
Journal	Muscle and Nerve
Volume	48
Issue number	2
DOIs	https://doi.org/10.1002/mus.23745
State	Published - 08 2013

Keywords

Electromyography
Exercise test
Inspiratory muscles
Muscle activity
Obstructive sleep apnea

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10.1002/mus.23745

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title = "Electrophysiologic changes with incremental exercise in obstructive sleep apnea",

abstract = "Introduction: 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.",

keywords = "Electromyography, Exercise test, Inspiratory muscles, Muscle activity, Obstructive sleep apnea",

author = "Chien, {Meng Yueh} and Chang, {Ya Ju} and Peilin Lee and Yang, {Pan Chyr} and Wu, {Ying Tai}",

year = "2013",

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publisher = "John Wiley & Sons Inc.",

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T1 - Electrophysiologic changes with incremental exercise in obstructive sleep apnea

AU - Chien, Meng Yueh

AU - Chang, Ya Ju

AU - Lee, Peilin

AU - Yang, Pan Chyr

AU - Wu, Ying Tai

PY - 2013/8

Y1 - 2013/8

N2 - Introduction: 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.

AB - Introduction: 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.

KW - Electromyography

KW - Exercise test

KW - Inspiratory muscles

KW - Muscle activity

KW - Obstructive sleep apnea

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Electrophysiologic changes with incremental exercise in obstructive sleep apnea

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