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Effects of inspiratory muscle training on dynamic hyperinflation in patients with COPD

Overview of attention for article published in International Journal of Chronic Obstructive Pulmonary Disease, November 2012
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  • Above-average Attention Score compared to outputs of the same age and source (53rd percentile)

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3 X users

Citations

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Readers on

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290 Mendeley
Title
Effects of inspiratory muscle training on dynamic hyperinflation in patients with COPD
Published in
International Journal of Chronic Obstructive Pulmonary Disease, November 2012
DOI 10.2147/copd.s23784
Pubmed ID
Authors

Milos Petrovic, Michael Reiter, Harald Zipko, Wolfgang Pohl, Theodor Wanke

Abstract

Dynamic hyperinflation has important clinical consequences in patients with chronic obstructive pulmonary disease (COPD). Given that most of these patients have respiratory and peripheral muscle weakness, dyspnea and functional exercise capacity may improve as a result of inspiratory muscle training (IMT). The aim of the study was to analyze the effects of IMT on exercise capacity, dyspnea, and inspiratory fraction (IF) during exercise in patients with COPD. Daily inspiratory muscle strength and endurance training was performed for 8 weeks in 10 patients with COPD GOLD II and III. Ten patients with COPD II and III served as a control group. Maximal inspiratory pressure (Pimax) and endurance time during resistive breathing maneuvers (tlim) served as parameter for inspiratory muscle capacity. Before and after training, the patients performed an incremental symptom limited exercise test to maximum and a constant load test on a cycle ergometer at 75% of the peak work rate obtained in the pretraining incremental test. ET was defined as the duration of loaded pedaling. Following IMT, there was a statistically significant increase in inspiratory muscle performance of the Pimax from 7.75 ± 0.47 to 9.15 ± 0.73 kPa (P < 0.01) and of tlim from 348 ± 54 to 467 ± 58 seconds (P < 0.01). A significant increase in IF, indicating decreased dynamic hyperinflation, was observed during both exercise tests. Further, the ratio of breathing frequency to minute ventilation (bf/V'(E)) decreased significantly, indicating an improved breathing pattern. A significant decrease in perception of dyspnea was also measured. Peak work rate during the incremental cycle ergometer test remained constant, while ET during the constant load test increased significantly from 597.1 ± 80.8 seconds at baseline to 733.6 ± 74.3 seconds (P < 0.01). No significant changes during either exercise tests were measured in the control group. The present study found that in patients with COPD, IMT results in improvement in performance, exercise capacity, sensation of dyspnea, and improvement in the IF prognostic factor.

X Demographics

X Demographics

The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 290 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 2 <1%
Spain 2 <1%
France 1 <1%
Italy 1 <1%
India 1 <1%
Portugal 1 <1%
Brazil 1 <1%
Canada 1 <1%
Unknown 280 97%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 54 19%
Student > Master 48 17%
Researcher 30 10%
Student > Ph. D. Student 21 7%
Student > Postgraduate 19 7%
Other 65 22%
Unknown 53 18%
Readers by discipline Count As %
Medicine and Dentistry 91 31%
Nursing and Health Professions 72 25%
Sports and Recreations 14 5%
Agricultural and Biological Sciences 11 4%
Unspecified 9 3%
Other 20 7%
Unknown 73 25%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 3. 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 December 2012.
All research outputs
#14,783,193
of 25,373,627 outputs
Outputs from International Journal of Chronic Obstructive Pulmonary Disease
#1,274
of 2,577 outputs
Outputs of similar age
#115,421
of 202,248 outputs
Outputs of similar age from International Journal of Chronic Obstructive Pulmonary Disease
#7
of 15 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. This one is in the 41st percentile – i.e., 41% 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 has gotten more attention than average, scoring higher than 50% of its peers.
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 202,248 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 42nd percentile – i.e., 42% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 15 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 53% of its contemporaries.