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Sedentary behaviour and physical activity in bronchiectasis: a cross-sectional study.

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Patients with bronchiectasis are largely inactive, with few meeting physical activity guidelines. Exercise capacity and quality of life are key factors influencing activity levels in this population.

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Area of Science:

  • Pulmonary Medicine
  • Exercise Physiology
  • Behavioral Science

Background:

  • Bronchiectasis significantly impacts patients' lives, yet its effects on sedentary behavior and physical activity remain largely unknown.
  • Understanding these impacts is crucial for developing targeted physical activity interventions for individuals with bronchiectasis.

Purpose of the Study:

  • To investigate the patterns of sedentary behavior and physical activity in patients diagnosed with bronchiectasis.
  • To identify correlates of sedentary behavior and physical activity within this patient group.

Main Methods:

  • Sixty-three patients with bronchiectasis wore accelerometers for seven days to measure physical activity.
  • Participants also completed quality of life questionnaires, spirometry, and the modified shuttle test (MST).
  • Multiple linear regression and t-tests were employed to analyze sedentary behavior and physical activity correlates.

Main Results:

  • The majority of patients (89%) did not meet recommended physical activity guidelines.
  • Sedentary behavior was correlated with decisional balance 'pros' score, while exercise capacity (MST performance) was the strongest correlate of physical activity.
  • For moderate-to-vigorous physical activity (MVPA), quality of life (QOL-B Social Functioning) was a significant correlate; Body Mass Index and QOL-B Respiratory Symptoms correlated with activity energy expenditure.

Conclusions:

  • Patients with bronchiectasis exhibit predominantly sedentary lifestyles, with limited adherence to physical activity recommendations.
  • Exercise capacity and quality of life dimensions are significant factors influencing physical activity levels, rather than FEV1% predicted or disease severity.
  • Findings underscore the necessity for tailored interventions to reduce sedentary behavior and enhance physical activity in the bronchiectasis population.