title: Energy expenditure during daily activities as measured by two motion sensors in patients with COPD.
abstract: BACKGROUND
  In patients with chronic obstructive pulmonary disease (COPD), energy expenditure (EE) assessment during the performance of daily activities is not yet studied in depth. The aim of this study was to determine which daily activities are more demanding to patients with COPD and to compare the accuracy of EE estimation given by the pedometer Digiwalker SW701 (DW) and the multisensor SenseWear Armband (SAB).
  
  
  METHODS
  Thirty-six patients with COPD (20 men; FEV1 48 ± 15%predicted; BMI 25.7 ± 8 kg/m(2)) were submitted to a modified version of the Glittre ADL-test, which included five activities performed for 1 min each: walking on the level, walking on the level carrying a backpack, walking up/downstairs, rising/sitting in chairs and moving objects in and out of a shelf. During the protocol subjects wore both devices concomitantly, and indirect calorimetry (IC) was simultaneously performed as the criterion method to assess EE.
  
  
  RESULTS
  The most demanding daily activity for individuals with COPD was walking up/downstairs (4.9 ± 1.7 kcal versus 3.7 ± 1.4 to 4.2 ± 1.8 kcal for the other tasks; p < 0.05). EE estimation by the SAB did not show difference in comparison to IC for the sum of the five activities (SAB = 22.7 ± 7 kcal versus IC = 21 ± 8 kcal; p > 0.05), although overestimation was found in activities involving walking. DW showed significant EE underestimation in the sum of the activities (9.6 ± 4.3 kcal; p < 0.05 versus IC) and for each activity.
  
  
  CONCLUSIONS
  Walking up/downstairs was the most energy-demanding daily activity for patients with COPD. Furthermore, during daily activities, the multisensor showed adequate overall estimation of energy expenditure, as opposed to the pedometer.
authors.affiliation: Laboratório de Pesquisa em Fisioterapia Pulmonar (LFIP), Departamento de Fisioterapia, Universidade Estadual de Londrina (UEL), Rua Robert Koch, 60, Vila Operária, 86038-440 Londrina, Paraná, Brazil.
authors.forename: Vinícius
authors.initials: V
authors.lastname: Cavalheri
authors.forename: Leila
authors.initials: L
authors.lastname: Donária
authors.forename: Thiemi
authors.initials: T
authors.lastname: Ferreira
authors.forename: Matheus
authors.initials: M
authors.lastname: Finatti
authors.forename: Carlos Augusto
authors.initials: CA
authors.lastname: Camillo
authors.forename: Ercy Mara
authors.initials: EM
authors.lastname: Cipulo Ramos
authors.forename: Fábio
authors.initials: F
authors.lastname: Pitta
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology; D000368:Aged; D003430:Cross-Sectional Studies; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory; D009038:Motion; D009043:Motor Activity / Q000502:physiology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000378:metabolism / Q000503:physiopathology* / Q000523:psychology; D013147:Spirometry; D016138:Walking / Q000502:physiology*