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Related Experiment Video

Updated: Feb 4, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
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Reduced Physical Activity With Bronchiectasis.

Anderson José1, Tamires Machado Ramos2, Rejane Agnelo Silva de Castro2

  • 1Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho, São Paulo, Brazil. dr.andersonjose@gmail.com.

Respiratory Care
|September 27, 2018
PubMed
Summary

Individuals with bronchiectasis show lower physical activity levels. Dyspnea significantly impacts activity, highlighting the need for targeted strategies to improve daily movement in this population.

Keywords:
activities of daily livingbronchiectasisdyspneaexercise testoxygen inhalation therapyphysical activity

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Area of Science:

  • Pulmonary Medicine
  • Exercise Physiology
  • Respiratory Health

Background:

  • Bronchiectasis is a chronic respiratory condition associated with reduced functional capacity.
  • The impact of dyspnea (shortness of breath) and long-term oxygen therapy on physical activity in bronchiectasis is not well understood.
  • Understanding these factors can inform strategies to enhance daily physical activity for individuals with bronchiectasis.

Purpose of the Study:

  • To evaluate physical activity levels in subjects with bronchiectasis compared to healthy controls.
  • To assess the influence of dyspnea and long-term oxygen therapy on physical activity.
  • To identify the key determinants of physical activity in bronchiectasis.

Main Methods:

  • A cross-sectional study involving 139 subjects with bronchiectasis and 49 healthy controls.
  • Physical activity was measured using pedometers (steps per day).
  • Functional capacity and dyspnea were assessed using spirometry, incremental shuttle walking test (ISWT), and standardized dyspnea measures.

Main Results:

  • Subjects with bronchiectasis had significantly lower daily steps (8,007) compared to controls (10,994).
  • Physical activity correlated with pulmonary function (FVC, FEV1), ISWT performance, and dyspnea severity.
  • Pulmonary function, dyspnea, ISWT, and long-term oxygen therapy were identified as independent determinants, explaining 32% of the variance in physical activity.

Conclusions:

  • Bronchiectasis patients exhibit significantly reduced physical activity compared to healthy individuals.
  • Dyspnea negatively impacts physical activity levels in this population.
  • Pulmonary function, dyspnea, functional capacity, and long-term oxygen therapy are key factors influencing physical activity, guiding future interventions.