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Title: Determinants of physical activity in daily life in candidates for lung transplantation
Authors: Langer, Daniel ×
Cebrià I Iranzo, M A
Burtin, Chris
Verleden, Stijn
Vanaudenaerde, Bart
Troosters, Thierry
Decramer, Marc
Verleden, Geert
Gosselink, Rik #
Issue Date: May-2012
Publisher: Bailliè€re Tindall, in association with the British Thoracic Society
Series Title: Respiratory Medicine vol:106 issue:5 pages:747-754
Abstract: BACKGROUND: Participation in daily physical activity (PA) has never been objectively assessed in candidates for lung transplantation (LTx). The main research questions were: 1) How active are LTx-candidates in daily life? 2) What are determinants of activity behavior before LTX? METHODS: Ninety-six candidates for LTx (diagnosis of COPD or interstitial lung disease; mean age 55 ± 7 years) underwent measurements of PA, pulmonary function, 6-min walking distance (6MWD), muscle force and health-status (SF-36 scale). RESULTS: Patients were markedly inactive (5% of waking hours walking, 26% standing and 69% sedentary). Backward multiple regression identified 6MWD (expressed as % of predicted value; β = 73.0 steps, partial r(2) = 0.36, p = 0.00), a higher score on the energy/fatigue scale of the SF-36 (β = 28.6 steps, partial r(2) = 0.09, p = 0.00) and a higher expiratory muscle force (expressed as % of predicted value; β = 11.8 steps, partial r(2) = 0.05, p = 0.02) as determinants of daily steps. Minutes of mild to moderate (≥2 METs) activity were determined by 6MWD (expressed as % of predicted value; β = 2.14 min, partial r(2) = 0.30, p = 0.00), inspiratory muscle force (expressed as % of predicted value; β = 0.33 min, partial r(2) = 0.04, p = 0.05) and seasonal influences (spring/summer vs. autumn/winter: β = 18.95 min, partial r(2) = 0.04, p = 0.05). The overall fit of the models was r(2) = 0.50 and r(2) = 0.38, respectively. CONCLUSIONS: The 6MWD was the main determinant of an inactive lifestyle in these patients. Respiratory muscle force, energy and fatigue and seasonal variations explained some additional variability in activity behavior. Patients should be encouraged to participate in interventions aimed at improving physical fitness and participation in daily physical activity before LTx.
URI: 
ISSN: 0954-6111
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Pneumology
Research Group for Cardiovascular and Respiratory Rehabilitation
× corresponding author
# (joint) last author

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