• Jorine E Hartman, Karin Klooster, Dirk-Jan Slebos, and Nick H T Ten Hacken.
• Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD, University of Groningen, University Medical Center Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands. Electronic address: j.hartman@umcg.nl.
• Respir Med. 2016 Aug 1; 117: 116-21.

RationaleBronchoscopic lung volume reduction using endobronchial valves is a promising treatment for severe emphysema patients without collateral ventilation. Physical activity is an important contributing factor for the autonomy, morbidity and mortality of these patients.ObjectiveWe investigated the impact of endobronchial valve treatment on physical activity in severe emphysema patients.MethodsPhysical activity was measured for 7 days by a triaxial accelerometer at baseline and 6 months follow-up after EBV treatment, and compared with standard medical care in a randomized controlled trial.ResultsForty-three patients (77%female, age 59 ± 9years, FEV1 30 ± 7%pred, steps 3563 ± 2213per/day) wore the accelerometer and were included in the analysis. Nineteen patients received EBV treatment and 24 standard medical care. At baseline, physical activity level was comparable between groups. After 6 months, the endobronchial valve group significantly improved compared to the controls in steps/day (+1252vs-148) and locomotion time (+17vs-2 min/day). Change in sit duration (0vs + 27 min/day) did not significantly differ.ConclusionsPhysical activity significantly improved after endobronchial valve treatment in severe emphysema patients. This improvement was without any specific encouragement on physical activity.Clinical Trial NumberDutch trial register: NTR2876.Copyright © 2016 Elsevier Ltd. All rights reserved.

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