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Related Concept Videos

Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
COPD: Management Using Bronchodilators and Corticosteroids01:26

COPD: Management Using Bronchodilators and Corticosteroids

Chronic obstructive pulmonary isease (COPD) involves a group of progressive lung disorders characterized by persistent airflow limitation and chronic respiratory symptoms. Asthma-COPD Overlap Syndrome (ACOS), encompassing features of both asthma and Chronic obstructive pulmonary disease (COPD), is a group of progressive lung disorders that includes chronic bronchitis, emphysema, and refractory (non-reversible) asthma. ACOS leads to complex clinical presentations that combine the inflammatory...

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Related Experiment Video

Updated: Jun 27, 2026

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
07:53

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Published on: September 13, 2015

Electrical stimulation and peripheral muscle function in COPD: a systematic review.

Marc Roig1, W Darlene Reid

  • 1Division of Physical Therapy, School of Rehabilitation Sciences, University of British Columbia, BC, Canada. markredj@interchange.ubc.ca

Respiratory Medicine
|December 19, 2008
PubMed
Summary

Electrical stimulation (ES) may improve muscle function in chronic obstructive pulmonary disease (COPD) patients, but evidence is limited. Further research is needed to optimize ES protocols for better outcomes in COPD management.

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Last Updated: Jun 27, 2026

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Area of Science:

  • Pulmonary Medicine
  • Rehabilitation Science
  • Neuromuscular Physiology

Background:

  • Peripheral muscle atrophy and weakness are common complications in chronic obstructive pulmonary disease (COPD).
  • Electrical stimulation (ES) is a potential therapeutic modality to enhance muscle function and structure.
  • Systematic review to evaluate ES effects on muscle function, size, fiber characteristics, and exercise performance in COPD patients.

Purpose of the Study:

  • To systematically review the effects of electrical stimulation (ES) on muscle function, size, fiber characteristics, and exercise performance in patients with COPD.
  • To assess the efficacy of ES as an intervention for improving physical capabilities in COPD.

Main Methods:

  • Systematic search of seven electronic databases for randomized controlled trials (RCTs).
  • Inclusion criteria: COPD patients, lower extremity ES protocols, primary outcome analysis, full text availability.
  • Data extraction and methodological quality assessment (PEDro scale) by two independent reviewers.

Main Results:

  • Five RCTs met inclusion criteria, with a mean methodological quality score of 6.2/10.
  • Meta-analyses of three studies indicated significant improvements in muscle torque and walking distance with ES.
  • Evidence regarding muscle size was equivocal, with less severe COPD patients showing a trend towards less improvement.

Conclusions:

  • Limited evidence suggests ES may improve lower limb muscle function in COPD patients, but effect sizes are modest.
  • Small sample sizes and a limited number of studies necessitate cautious interpretation.
  • Further research is required to determine optimal ES parameters and identify patient subgroups who benefit most.