Peak Quadriceps Muscle Torque and Electromyographic Output in Patients With Chronic Respiratory Disorders: Effects of Pulmonary Rehabilitation.

Gregory Grandio, Guadalupe Yetter, Spencer Briglio, Kimberly Ong, Joel Froding, Jimmy Kim, Juan Cortez, Ahmet Baydur

Abstract read

In one paragraph

Article in Archives of rehabilitation research and clinical translation, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it

0cells of the map it votes in

2citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

Molecular and Structural Changes, and Skeletal Muscle Strength and Endurance in Chronic Obstructive Pulmonary Disease and Interstitial Lung Disease: Practical Applications of Assessment and Management.Bioengineering (Basel, Switzerland) · 2026
Review
Peak Quadriceps Muscle Torque and Electromyographic Output in Patients With Chronic Respiratory Disorders: Effects of Pulmonary Rehabilitation.Archives of rehabilitation research and clinical translation · 2023
Article

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Gregory GrandioDivision of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.

Guadalupe YetterDepartment of Physical Therapy, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Spencer BriglioDepartment of Physical Therapy, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Kimberly OngDepartment of Physical Therapy, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Joel FrodingDepartment of Physical Therapy, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Jimmy KimDepartment of Physical Therapy, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Juan CortezDepartment of Internal Medicine, Los Angeles County + University of Southern California Medical Center, Los Angeles, CA.

Ahmet BaydurDivision of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Objective: To assess the change in relation of the peak quadriceps electromyographic signal to the peak torque produced during a train of 5 isokinetic knee extensions (from 90 degrees below horizontal at a constant speed of 60 degrees/s) at baseline, and at 4 and 8 weeks of pulmonary rehabilitation. Design: In this prospective observational study, isokinetic contractions were recorded during the extensions from the knee bent at 90 degrees to the horizontal plane against graded resistance. Peak quadriceps torque signal (Tq) and peak electromyographic signal (Eq) were recorded by dynamometry and surface electrodes placed at designated locations over the muscle group, respectively. Setting: Physical therapy department in a tertiary care medical center. Participants: Eighteen patients (9 restrictive lung disease, 6 chronic airflow limitation, 3 non-ILD restrictive; N=18) were compared with 11 healthy control subjects. Interventions: Patients underwent an 8-week pulmonary rehabilitation program. Main Outcome Measures: Comparisons of Tq, Eq, and Tq/Eq ratio among patients and controls were by analysis of variance. Associations between physiological variables were determined by multivariable Pearson's correlation. Results: Compared with patients, controls exhibited a 22% higher baseline mean peak Eq ( Conclusions: Eight weeks of pulmonary rehabilitation result in a decrease in Eq/Tq, indicating improvement in force generation of limb muscles, with the change occurring in the first 4 weeks.

Indexed as

Chronic airflow limitationDynamometryElectromyographyInterstitial lung diseaseIsokinetic contractionsLimb muscle functionPulmonary rehabilitation

Identifiers

PMID37312975

DOI10.1016/j.arrct.2023.100259

PMCPMC10258385

What Socratic holds

Textmetadata

LicenceCC BY-NC-ND

Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.