Precision and accuracy of an ankle-worn accelerometer-based pedometer in step counting and energy expenditure

Randal C. Foster, Lorraine M. Lanningham-Foster, Chinmay Manohar, Shelly K. McCrady, Lana J. Nysse, Kenton R Kaufman, Denny J. Padgett, James A. Levine

Research output: Contribution to journalArticle

135 Citations (Scopus)

Abstract

Background. Walking is a widely used approach to increase physical activity levels in obese patients. In this paper, we investigate the precision and accuracy of an ankle-worn dual-axis accelerometer (Stepwatch) and investigate its potential application as a predictor of energy expenditure. Methods. Twenty healthy subjects (10 lean, 10 obese) wore spring-levered (Accusplit), piezoelectric (Omron HF-100), and Stepwatch pedometers. Subjects walked on a treadmill at 1, 2, and 3 mph and in a hallway at 1 and 1.85 mph, during which energy expenditure was measured. Results. The Stepwatch counted 99.7 ± 0.67% (mean ± SEM) of the manual counts. In comparison, the Omron pedometer counted 61 ± 3.3% and the Accusplit counted 26 ± 2.8% of the manual counts at 1 mph although all pedometers were accurate (>98% of counts) at 3 mph. In repeated measures, the Stepwatch produced negligible variance (SD = 0.36) over all speed whereas the other pedometers showed a large amount of variance at all speed (SD = 4-13). Stepwatch counts were predictive of walking energy expenditure corrected by weight (r2 > 0.8). Conclusion. The counts from the Stepwatch were virtually identical to the manual counts from a trained investigator and provided a reliable predictor of walking energy expenditure.

Original languageEnglish (US)
Pages (from-to)778-783
Number of pages6
JournalPreventive Medicine
Volume41
Issue number3-4
DOIs
StatePublished - Sep 2005

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Ankle
Energy Metabolism
Walking
Healthy Volunteers
Research Personnel
Exercise
Weights and Measures

Keywords

  • Ambulation
  • Obesity
  • Physical activity

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Foster, R. C., Lanningham-Foster, L. M., Manohar, C., McCrady, S. K., Nysse, L. J., Kaufman, K. R., ... Levine, J. A. (2005). Precision and accuracy of an ankle-worn accelerometer-based pedometer in step counting and energy expenditure. Preventive Medicine, 41(3-4), 778-783. https://doi.org/10.1016/j.ypmed.2005.07.006

Precision and accuracy of an ankle-worn accelerometer-based pedometer in step counting and energy expenditure. / Foster, Randal C.; Lanningham-Foster, Lorraine M.; Manohar, Chinmay; McCrady, Shelly K.; Nysse, Lana J.; Kaufman, Kenton R; Padgett, Denny J.; Levine, James A.

In: Preventive Medicine, Vol. 41, No. 3-4, 09.2005, p. 778-783.

Research output: Contribution to journalArticle

Foster, RC, Lanningham-Foster, LM, Manohar, C, McCrady, SK, Nysse, LJ, Kaufman, KR, Padgett, DJ & Levine, JA 2005, 'Precision and accuracy of an ankle-worn accelerometer-based pedometer in step counting and energy expenditure', Preventive Medicine, vol. 41, no. 3-4, pp. 778-783. https://doi.org/10.1016/j.ypmed.2005.07.006
Foster, Randal C. ; Lanningham-Foster, Lorraine M. ; Manohar, Chinmay ; McCrady, Shelly K. ; Nysse, Lana J. ; Kaufman, Kenton R ; Padgett, Denny J. ; Levine, James A. / Precision and accuracy of an ankle-worn accelerometer-based pedometer in step counting and energy expenditure. In: Preventive Medicine. 2005 ; Vol. 41, No. 3-4. pp. 778-783.
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