title: Energy expenditure at rest and during walking in patients with chronic respiratory failure: a prospective two-phase case-control study.
abstract: BACKGROUND
  Measurements of Energy Expenditure (EE) at rest (REE) and during physical activities are increasing in interest in chronic patients. In this study we aimed at evaluating the validity/reliability of the SenseWear®Armband (SWA) device in terms of REE and EE during assisted walking in Chronic Respiratory Failure (CRF) patients receiving long-term oxygen therapy (LTOT).
  
  
  RESULTS
  In a two-phase prospective protocol we studied 40 severe patients and 35 age-matched healthy controls. In phase-1 we determined the validity and repeatability of REE measured by SWA (REEa) in comparison with standard calorimetry (REEc). In phase-2 we then assessed EE and Metabolic Equivalents-METs by SWA during the 6-minute walking test while breathing oxygen in both assisted (Aid) or unassisted (No-Aid) modalities. When compared with REEc, REEa was slightly lower in patients (1351±169 vs 1413±194 kcal/day respectively, p<0.05), and less repeatable than in healthy controls (0.14 and 0.43 coefficient respectively). COPD patients with CRF patients reported a significant gain with Aid as compared with No-Aid modality in terms of meters walked, perceived symptoms and EE.
  
  
  CONCLUSIONS
  SWA provides a feasible and valid method to assess the energy expenditure in CRF patients on LTOT, and it shows that aided walking results in a substantial energy saving in this population.
authors: Department of Pulmonary Rehabilitation, Ospedale Villa Pineta, Pavullo nel Frignano, Modena, Italy. ecrisafulli@pneumonet.it
authors: Ernesto
authors: E
authors: Crisafulli
authors: Claudio
authors: C
authors: Beneventi
authors: Veronica
authors: V
authors: Bortolotti
authors: Nicoletta
authors: N
authors: Kidonias
authors: Leonardo M
authors: LM
authors: Fabbri
authors: Alfredo
authors: A
authors: Chetta
authors: Enrico M
authors: EM
authors: Clini
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D002908:Chronic Disease; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015203:Reproducibility of Results; D012131:Respiratory Insufficiency / Q000503:physiopathology*; D012146:Rest / Q000502:physiology*; D016138:Walking / Q000502:physiology*