An evaluation of the IDEEA™ activity monitor for estimating energy expenditure

Stephen Whybrow, Patrick Ritz, Graham W Horgan, R James Stubbs

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)
7 Downloads (Pure)


Objective estimates of activity patterns and energy expenditure (EE) are important for the measurement of energy balance. The Intelligent Device for Energy Expenditure and Activity (IDEEA) can estimate EE from the thirty-five postures and activities it can identify and record. The present study evaluated the IDEEA system's estimation of EE using whole-body indirect calorimetry over 24 h, and in free-living subjects using doubly-labelled water (DLW) over 14 d. EE was calculated from the IDEEA data using calibration values for RMR and EE while sitting and standing, both as estimated by the IDEEA system (IDEEA(est)) and measured by indirect calorimetry (IDEEA(meas)). Subjects were seven females and seven males, mean age 38·1 and 39·7 years, mean BMI 25·2 and 26·2 kg/m2, respectively. The IDEEA(est) method produced a similar estimate of EE to the calorimeter (10·8 and 10·8 MJ, NS), while the IDEEA(meas) method underestimated EE (9·9 MJ, P
Original languageEnglish
Pages (from-to)173-183
Number of pages11
JournalBritish Journal of Nutrition
Issue number1
Early online date2 Apr 2012
Publication statusPublished - 14 Jan 2013


  • Activities of Daily Living
  • Adult
  • Basal Metabolism
  • Calibration
  • Calorimetry, Indirect
  • Carbon Dioxide
  • Energy Metabolism
  • Female
  • Heart Rate
  • Humans
  • Male
  • Materials Testing
  • Middle Aged
  • Models, Biological
  • Monitoring, Ambulatory
  • Motor Activity
  • Oxygen Consumption
  • Water
  • Young Adult


Dive into the research topics of 'An evaluation of the IDEEA™ activity monitor for estimating energy expenditure'. Together they form a unique fingerprint.

Cite this