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

Abstract

BackgroundThe impact of bronchiectasis on sedentary behaviour and physical activity is unknown. It is important to explore this to identify the need for physical activity interventions and how to tailor interventions to this patient population. We aimed to explore the patterns and correlates of sedentary behaviour and physical activity in bronchiectasis.MethodsPhysical activity was assessed in 63 patients with bronchiectasis using an ActiGraph GT3X+ accelerometer over seven days. Patients completed: questionnaires on health-related quality-of-life and attitudes to physical activity (questions based on an adaption of the transtheoretical model (TTM) of behaviour change); spirometry; and the modified shuttle test (MST). Multiple linear regression analysis using forward selection based on likelihood ratio statistics explored the correlates of sedentary behaviour and physical activity dimensions. Between-group analysis using independent sample t-tests were used to explore differences for selected variables.ResultsFifty-five patients had complete datasets. Average daily time, mean(standard deviation) spent in sedentary behaviour was 634(77)mins, light-lifestyle physical activity was 207(63)mins and moderate-vigorous physical activity (MVPA) was 25(20)mins. Only 11% of patients met recommended guidelines. Forced expiratory volume in one-second percentage predicted (FEV1% predicted) and disease severity were not correlates of sedentary behaviour or physical activity. For sedentary behaviour, decisional balance ‘pros’ score was the only correlate. Performance on the MST was the strongest correlate of physical activity. In addition to the MST, there were other important correlate variables for MVPA accumulated in ≥10-minute bouts (QOL-B Social Functioning) and for activity energy expenditure (Body Mass Index and QOL-B Respiratory Symptoms).ConclusionsPatients with bronchiectasis demonstrated a largely inactive lifestyle and few met the recommended physical activity guidelines. Exercise capacity was the strongest correlate of physical activity, and dimensions of the QOL-B were also important. FEV1% predicted and disease severity were not correlates of sedentary behaviour or physical activity. The inclusion of a range of physical activity dimensions could facilitate in-depth exploration of patterns of physical activity. This study demonstrates the need for interventions targeted at reducing sedentary behaviour and increasing physical activity, and provides information to tailor interventions to the bronchiectasis population.Trial registrationNCT01569009 (“Physical Activity in Bronchiectasis”)Electronic supplementary materialThe online version of this article (doi:10.1186/s12890-015-0046-7) contains supplementary material, which is available to authorized users.

Comparing accelerometer, pedometer and a questionnaire for measuring physical activity in bronchiectasis: a validity and feasibility study

“…Additional methods and results from the primary study which relates to patterns correlates of sedentary behaviour and physical activity have been published previously [15]. Participants who agreed to take part in the study attended a clinical visit (Visit 1) where they provided baseline demographics; disease severity was estimated using the Bronchiectasis Severity Index [16].…”

British Thoracic Society Guideline for bronchiectasis in adults

“…212 Only 11% of participants met the recommended physical activity guidelines of ≥150 min of at least moderate activity per week. 213 There are four randomised controlled trials (RCTs) which investigate the effects of pulmonary rehabilitation (PR) in bronchiectasis.…”

Applying the Transtheoretical Model to Physical Activity Behavior in Individuals With Non-Cystic Fibrosis Bronchiectasis

“…10 In brief, subjects with bronchiectasis were recruited from 3 hospitals in Northern Ireland. Inclusion criteria were: age Ն18 y, diagnosis of bronchiectasis confirmed either by computed tomography or high-resolution computed tomography Յ10-pack-year smoking history, clinical stability (no pulmonary exacerbation), no significant change in symptoms or medication in the last 4 weeks and sputum bacteriology completed over the past 3 months.…”

“…In brief, few individuals with bronchiectasis met the recommended physical activity guidelines, with many demonstrating largely inactive lifestyles. 10 No physical activity interventions have been conducted in individuals with bronchiectasis, highlighting the need for development of physical activity interventions that are tailored to this group.…”