title: Validity of the SenseWear Armband to assess energy expenditure in graded walking.
abstract: BACKGROUND
  Accurate assessments of physical activity and energy expenditure (EE) are needed to advance research on positive and negative graded walking.
  
  
  OBJECTIVE
  To evaluate the validity of 2 SenseWear Armband monitors (Pro3 and the recently released Mini) during graded walking.
  
  
  METHODS
  Twenty healthy adults wore both monitors during randomized walking activities on a motorized treadmill at 7 grades (0%, ±5%, ±15%, and ±25%). Estimates of total EE from the monitors were computed using different algorithms and compared with values derived from indirect calorimetry methodology using a 2-way mixed model ANOVA (Device × Condition), correlation analyses and Bland-Altman plots.
  
  
  RESULTS
  There was no significant difference in EE between the 2 armbands in any of the conditions examined. Significant main effects for device and condition, as well as a consistent bias, were observed during positive and negative graded walking with a greater over- and under-estimation at higher slope.
  
  
  CONCLUSIONS
  Both the armbands produced similar EE values and seem to be not accurate in estimation of EE during activities involving uphill and downhill walking. Additional work is needed to understand factors contributing to this discrepancy and to improve the ability of these monitors to accurately measure EE during graded walking.
authors: CeRiSM, University of Verona, Roverto, Italy.
authors: Gianluca
authors: G
authors: Vernillo
authors: Aldo
authors: A
authors: Savoldelli
authors: Barbara
authors: B
authors: Pellegrini
authors: Federico
authors: F
authors: Schena
mesh_terms: D061725:Accelerometry / Q000295:instrumentation; D000328:Adult; D000465:Algorithms; D002153:Calorimetry, Indirect / Q000295:instrumentation*; D004734:Energy Metabolism; D005080:Exercise Test / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D016138:Walking / Q000502:physiology*