title: Validation of an integrated pedal desk and electronic behavior tracking platform.
abstract: BACKGROUND
  This study tested the validity of revolutions per minute (RPM) measurements from the Pennington Pedal Desk™. Forty-four participants (73 % female; 39 ± 11.4 years-old; BMI 25.8 ± 5.5 kg/m(2) [mean ± SD]) completed a standardized trial consisting of guided computer tasks while using a pedal desk for approximately 20 min. Measures of RPM were concurrently collected by the pedal desk and the Garmin Vector power meter. After establishing the validity of RPM measurements with the Garmin Vector, we performed equivalence tests, quantified mean absolute percent error (MAPE), and constructed Bland-Altman plots to assess agreement between RPM measures from the pedal desk and the Garmin Vector (criterion) at the minute-by-minute and trial level (i.e., over the approximate 20 min trial period).
  
  
  RESULTS
  The average (mean ± SD) duration of the pedal desk trial was 20.5 ± 2.5 min. Measures of RPM (mean ± SE) at the minute-by-minute (Garmin Vector: 54.8 ± 0.4 RPM; pedal desk: 55.8 ± 0.4 RPM) and trial level (Garmin Vector: 55.0 ± 1.7 RPM; pedal desk: 56.0 ± 1.7 RPM) were deemed equivalent. MAPE values for RPM measured by the pedal desk were small (minute-by-minute: 2.1 ± 0.1 %; trial: 1.8 ± 0.1 %) and no systematic relationships in error variance were evident by Bland-Altman plots.
  
  
  CONCLUSIONS
  The Pennington Pedal Desk™ provides a valid count of RPM, providing an accurate metric to promote usage.
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. John.Schuna@oregonstate.edu.|School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR, USA. John.Schuna@oregonstate.edu.
authors: John M
authors: JM
authors: Schuna
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. ctudorlocke@umass.edu.|Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, 01003, USA. ctudorlocke@umass.edu.
authors: Catrine
authors: C
authors: Tudor-Locke
authors: Laboratório de Pesquisa em Fisioterapia Pulmonar (LFIP), Departamento de Fisioterapia, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil. mahara.proenca@gmail.com.|CAPES Foundation, Ministry of Education of Brazil, Brasília, DF, 70040-020, Brazil. mahara.proenca@gmail.com.
authors: Mahara
authors: M
authors: Proença
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. tvbarrei@syr.edu.|Department of Exercise Science, Syracuse University, 900 S. Crouse Ave., Syracuse, NY, 13210, USA. tvbarrei@syr.edu.
authors: Tiago V
authors: TV
authors: Barreira
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. Daniel.Hsia@pbrc.edu.
authors: Daniel S
authors: DS
authors: Hsia
authors: Laboratório de Pesquisa em Fisioterapia Pulmonar (LFIP), Departamento de Fisioterapia, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil. fabiopitta@uol.com.br.
authors: Fabio
authors: F
authors: Pitta
authors: Vinformatrix, Baton Rouge, LA, USA. padma@vinformatix.com.
authors: Padma
authors: P
authors: Vatsavai
authors: Vinformatrix, Baton Rouge, LA, USA. rguidry@vinformatix.com.
authors: Richard D
authors: RD
authors: Guidry
authors: St. James Technologies, Baton Rouge, LA, USA. mmagnuson@sjtechs.com.
authors: Matthew R
authors: MR
authors: Magnusen
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. Mandy.Cowley@pbrc.edu.
authors: Amanda D
authors: AD
authors: Cowley
authors: Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA. Corby.Martin@pbrc.edu.
authors: Corby K
authors: CK
authors: Martin
mesh_terms: D000328:Adult; D001519:Behavior; D001642:Bicycling; D004581:Electronics / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results