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Related Experiment Video

Updated: Dec 16, 2025

Acquisition and Semi-Automated Analysis of Respiratory Muscle Surface Electromyography
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Acquisition and Semi-Automated Analysis of Respiratory Muscle Surface Electromyography

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Assessing paediatric exercise-induced bronchoconstriction using electromyography.

Pascal B Keijzer1,2, Mattiènne R van der Kamp1,3, Boony J Thio1

  • 1Medisch Spectrum Twente, Enschede, the Netherlands.

ERJ Open Research
|July 3, 2020
PubMed
Summary
This summary is machine-generated.

Surface electromyography (EMG) of the diaphragm can accurately identify exercise-induced bronchoconstriction (EIB) in children. This less invasive method offers a promising alternative to traditional exercise challenge tests for assessing asthma control.

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Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology
  • Diagnostic Tools

Background:

  • Childhood asthma affects up to 10% of children.
  • Exercise-induced bronchoconstriction (EIB) indicates uncontrolled asthma.
  • Current EIB assessment (exercise challenge test) requires difficult breathing maneuvers.

Purpose of the Study:

  • To evaluate diaphragm surface electromyography (EMG) as an alternative EIB assessment.
  • To investigate the relationship between diaphragm EMG and FEV1 changes post-exercise.

Main Methods:

  • 42 children with suspected EIB underwent an exercise challenge test (ECT) with portable EMG.
  • EIB defined as >13% fall in FEV1.
  • Spirometry and EMG recorded before, during, and after exercise.

Main Results:

  • 20/42 children diagnosed with EIB.
  • Diaphragm EMG peak amplitude significantly higher in children with EIB (4.85 μV) vs. without (0.20 μV).
  • EMG accurately distinguished EIB with 95% sensitivity and 91% specificity at a 1.15 μV cutoff.

Conclusions:

  • Diaphragm EMG strongly correlates with FEV1 and accurately identifies EIB.
  • EMG is a less invasive, effort-independent alternative to spirometry for EIB assessment.
  • EMG may be valuable when spirometry is not feasible.