Validation of an integrated pedal desk and electronic behavior tracking platform

John M. Schuna, Catrine Tudor-Locke, Mahara Proença, Tiago V. Barreira, Daniel S. Hsia, Fabio Pitta, Padma Vatsavai, Richard D. Guidry, Matthew R. Magnusen, Amanda D. Cowley, Corby K. Martin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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/m2 [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. Conclusion: The Pennington Pedal Desk™ provides a valid count of RPM, providing an accurate metric to promote usage.

Original languageEnglish (US)
Article number74
JournalBMC Research Notes
Issue number1
StatePublished - Feb 9 2016


  • Exercise
  • Pedal desk
  • Physical activity
  • Sedentary behavior
  • Workplace

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology


Dive into the research topics of 'Validation of an integrated pedal desk and electronic behavior tracking platform'. Together they form a unique fingerprint.

Cite this