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Test-retest reliability of lower limb isokinetic endurance in COPD: a comparison of angular velocities

Overview of attention for article published in International Journal of Chronic Obstructive Pulmonary Disease, June 2015
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Title
Test-retest reliability of lower limb isokinetic endurance in COPD: a comparison of angular velocities
Published in
International Journal of Chronic Obstructive Pulmonary Disease, June 2015
DOI 10.2147/copd.s81806
Pubmed ID
Authors

Fernanda Ribeiro, Pierre-Alexis Lépine, Corine Garceau-Bolduc, Valérie Coats, Étienne Allard, François Maltais, Didier Saey

Abstract

The purpose of this study was to determine and compare the test-retest reliability of quadriceps isokinetic endurance testing at two knee angular velocities in patients with chronic obstructive pulmonary disease (COPD). After one familiarization session, 14 patients with moderate to severe COPD (mean age 65±4 years; forced expiratory volume in 1 second (FEV1) 55%±18% predicted) performed two quadriceps isokinetic endurance tests on two separate occasions within a 5-7-day interval. Quadriceps isokinetic endurance tests consisted of 30 maximal knee extensions at angular velocities of 90° and 180° per second, performed in random order. Test-retest reliability was assessed for peak torque, muscle endurance, work slope, work fatigue index, and changes in FEV1 for dyspnea and leg fatigue from rest to the end of the test. The intraclass correlation coefficient, minimal detectable change, and limits of agreement were calculated. High test-retest reliability was identified for peak torque and muscle total work at both velocities. Work fatigue index was considered reliable at 90° per second but not at 180° per second. A lower reliability was identified for dyspnea and leg fatigue scores at both angular velocities. Despite a limited sample size, our findings support the use of a 30-maximal repetition isokinetic muscle testing procedure at angular velocities of 90° and 180° per second in patients with moderate to severe COPD. Endurance measurement (total isokinetic work) at 90° per second was highly reliable, with a minimal detectable change at the 95% confidence level of 10%. Peak torque and fatigue index could also be assessed reliably at 90° per second. Evaluation of dyspnea and leg fatigue using the modified Borg scale of perceived exertion was poorly reliable and its clinical usefulness is questionable. These results should be useful in the design and interpretation of future interventions aimed at improving muscle endurance in COPD.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 95 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 1 1%
Portugal 1 1%
France 1 1%
Unknown 92 97%

Demographic breakdown

Readers by professional status Count As %
Student > Master 16 17%
Student > Bachelor 12 13%
Student > Ph. D. Student 10 11%
Researcher 9 9%
Student > Postgraduate 7 7%
Other 21 22%
Unknown 20 21%
Readers by discipline Count As %
Medicine and Dentistry 20 21%
Nursing and Health Professions 19 20%
Sports and Recreations 10 11%
Engineering 5 5%
Agricultural and Biological Sciences 4 4%
Other 11 12%
Unknown 26 27%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 July 2015.
All research outputs
#16,722,913
of 25,374,917 outputs
Outputs from International Journal of Chronic Obstructive Pulmonary Disease
#1,613
of 2,577 outputs
Outputs of similar age
#159,109
of 281,412 outputs
Outputs of similar age from International Journal of Chronic Obstructive Pulmonary Disease
#34
of 71 outputs
Altmetric has tracked 25,374,917 research outputs across all sources so far. This one is in the 32nd percentile – i.e., 32% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,577 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.5. This one is in the 33rd percentile – i.e., 33% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 281,412 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 40th percentile – i.e., 40% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 71 others from the same source and published within six weeks on either side of this one. This one is in the 49th percentile – i.e., 49% of its contemporaries scored the same or lower than it.