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Related Experiment Video

Updated: Jul 30, 2025

Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
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Do Functional Tests Estimate Physical Activity in COPD?

Natielly Soares Correia1,2, Joice Mara de Oliveira1,2, Lorena Paltanin Schneider1,2

  • 1Laboratory of Research in Respiratory Physiotherapy, Department of Physiotherapy, Londrina State University (UEL), Londrina, Brazil.

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|May 11, 2023
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Summary
This summary is machine-generated.

Simple functional tests like the Sit-to-Stand (STS) and 4-Metre Gait Speed (4MGS) tests can help identify physical inactivity in chronic obstructive pulmonary disease (COPD) patients. These tests are associated with daily physical activity levels in individuals with COPD.

Keywords:
Motor activityactivities of daily livinghealth evaluationphysical fitnesspulmonary disease chronic obstructive

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Area of Science:

  • Pulmonary Medicine
  • Rehabilitation Science
  • Gerontology

Background:

  • Physical activity in daily life (PADL) is crucial for managing chronic obstructive pulmonary disease (COPD).
  • The relationship between simple functional tests and PADL in COPD patients remains unclear.
  • Understanding this association can aid in identifying inactive individuals.

Purpose of the Study:

  • To investigate the association between the Sit-to-Stand test (STS) and the 4-Metre Gait Speed test (4MGS) with PADL in COPD subjects.
  • To determine if STS and 4MGS can discriminate between physically active and inactive COPD patients.

Main Methods:

  • Cross-sectional study involving 28 COPD subjects.
  • Performance of STS (5 repetitions) and 4MGS.
  • Assessment of PADL using the DynaPort activity monitor for 7 days, measuring walking time, movement intensity (MI), and Physical Activity Level index (PAL).

Main Results:

  • Both STS and 4MGS showed significant associations with walking time and PAL index (R² up to 0.30).
  • Movement intensity was associated only with 4MGS (R² = 0.23).
  • Both tests effectively discriminated physically inactive subjects (STS cutoff: 11.48s, 4MGS cutoff: 1.09m/s).

Conclusions:

  • STS and 4MGS can predict up to 30% of PADL variance in COPD patients.
  • These functional tests are linked to PADL duration (walking time) and, for 4MGS, movement intensity.
  • STS and 4MGS demonstrate discriminative ability for identifying individuals with lower PADL in COPD.