TY - JOUR T1 - Physical activity and its relation with exercise capacity in patients with early COPD JF - European Respiratory Journal JO - Eur Respir J VL - 38 IS - Suppl 55 SP - p281 AU - Hans Van Remoortel AU - Miek Hornikx AU - Kristien De Bent AU - Erica Balligand AU - Chris Burtin AU - Daniel Langer AU - Rik Gosselink AU - Marc Decramer AU - Wim Janssens AU - Thierry Troosters Y1 - 2011/09/01 UR - http://erj.ersjournals.com/content/38/Suppl_55/p281.abstract N2 - Background: Physical activity (PA) and exercise capacity are reduced in patients with severe COPD. We aimed to assess PA and its relation with exercise capacity in mild COPD.Methods: We assessed PA (SenseWear Armband) for 7 days (reported as the average number of steps (PAsteps) and the time spent in moderate PA (> 3METs, PAmod)) in 123 (ex-)smokers (49 with COPD; 33 GOLD I and 16 GOLD II) and 55 non-smokers. Exercise capacity was determined by VO2max and six minute walking distance (6MWD).Results: Group characteristics are given in table1. PA was significantly correlated (p<0.0001) with 6MWD (r=0.37 and r=0.27 with PAsteps and PAmod, respectively) and VO2max (r=0.39 and r=0.35 with PAsteps and PAmod, respectively).Stepwise multiple regression analysis showed that PAsteps is determined by age (R2=0.17), 6MWT (R2=0.09), season of PA assessment (1=summer/spring/autumn, R2=0.02) and diagnosis of COPD (R2=0.02; total R2=0.30). PAmod is determined by season (R2=0.12), age (R2=0.05), 6MWD (R2=0.04), gender (R2=0.02) and COPD (R2=0.02; total R2=0.25).View this table:Table 1. Group characteristicsConclusion: PA is reduced in patients with mild COPD. Age, season of PA assessment and 6MWD are predictors of PA. ER -