Share This Article:

Counting Steps in Research: A Comparison of Accelerometry and Pedometry

Full-Text HTML Download Download as PDF (Size:1897KB) PP. 1-7
DOI: 10.4236/ojpm.2011.11001    5,131 Downloads   11,154 Views   Citations

ABSTRACT

The objective of this study was to assess the validity of the step count functions in Actical accelerometers and activPAL inclinometers, compared with pedome-ter-derived step count data. Firstly, directly observed step counts over 3 treadmill speeds were compared with steps collected from 3 pedometers, accelerometers, and inclinometers in 10 adults. Secondly, step count data were derived from 22 participants who wore a pedome-ter, accelerometer, and inclinometer over 48 hours. Agreement between measurement tools was determined. All monitors appropriately measured steps in the labo-ratory conditions. In free living conditions, the mean percentage differences with pedometer-determined step counts were -7.3% and 7.0% for the Actical and ac-tivPAL monitors, respectively. With the exception of slow walking for the Actical units (ICC < 0.001), acceptable reliability was found within units for all treadmill speeds, and across units during the free living condition. The 95% prediction interval ranges were wide, ranging from -68.8% to 54.2% for the Acticals, and from -39.1% to 53.2% for the activPALs. Step counts gathered from Actical and activPAL units should not be used interchangeably with pedometer-derived step count data.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Oliver, M. , Badland, H. , Shepherd, J. and Schofield, G. (2011) Counting Steps in Research: A Comparison of Accelerometry and Pedometry. Open Journal of Preventive Medicine, 1, 1-7. doi: 10.4236/ojpm.2011.11001.

References

[1] [1] Tudor-Locke, C., Ainsworth, B.E., Whitt, M.C., Thompson, R.W., Addy, C.L. and Jones, D.A. (2001) The relationship between pedometer-determined ambulatory activity and body composition variables. International Journal of Obesity, 25, 1571-1578. doi:10.1038/sj.ijo.0801783
[2] [2] Bravata, D.M., Smith-Spangler, C., Sundaram, V., Gienger, A.L., Lin, N., Lewis, R., et al. (2007) Using pedometers to increase physical activity and improve health. A systematic review. Journal of the American Medical Association, 298, 2296-2304. doi:10.1001/jama.298.19.2296
[3] [3] Heil, D.P. (2006) Predicting activity energy expenditure using the Actical? activity monitor. Research Quarterly for Exercise and Sport, 77, 64-80.
[4] [4] Esliger, D.W., Probert, A., Gorber, S.C., Bryan, S., Laviolette, M. and Tremblay, M.S. (2007) Validity of the Actical accelerometer step-count function. Medicine & Science in Sports & Exercise, 39, 1200-1204. doi:10.1249/mss.0b013e3804ec4e9
[5] [5] Grant, P.M., Ryan, C.G., Tigbe, W.W. and Granat, M.H. (2006) The validation of a novel activity monitor in the measurement of posture and motion during everyday activities British Journal of Sports Medicine, 40, 992- 997. doi:10.1136/bjsm.2006.030262
[6] [6] Busse, M.E., van Deursen, R.W. and Wiles, C.M. (2009) Real- life step and activity measurement: Reliability and validity. Journal of Medical Engineering & Technology, 33, 33-41. doi:10.1080/03091900701682606
[7] [7] Godfrey, A., Culhane, K.M. and Lyons, G.M. (2007) Comparison of the performance of the activPAL? Professional physical activity logger to a discrete accelerometer-based activity monitor. Medical Engineering & Physics, 29, 930-934. doi:10.1016/j.medengphy.2006.10.001
[8] [8] Ryan, C.G., Grant, P.M., Tigbe, W.W. and Granat, M.H. (2006) The validity and reliability of a novel activity monitor as a measure of walking. British Journal of Sports Medicine, 40, 779-784. doi:10.1136/bjsm.2006.027276
[9] [9] Maddocks, M., Petrou, A., Skipper, L. and Wilcock, A. (2008) Validity of three accelerometers during treadmill walking and motor vehicle travel. British Journal of Sports Medicine, Online First, doi:10.1136/bjsm.2008.051128
[10] [10] Oliver, M., Badland, H.M., Schofield, G.M. and Shepherd, J. (in press) Identification of non-wear time and sedentary behavior using accelerometry. Research Quarterly for Exercise and Sport.
[11] [11] Oliver, M., Schofield, G.M., Badland, H.M. and Shepherd, J. (2010) Utility of accelerometer thresholds for classifying sitting in office workers. Preventive Medicine, 51, 357- 360. doi:10.1016/j.ypmed.2010.08.010
[12] [12] Crouter, S.E., Schneider, P.L., Karabulut, M. and Bassett, D.R., Jr. (2003) Validity of 10 electronic pedometers for measuring steps, distance, and energy cost. Medicine & Science in Sports & Exercise, 35, 1455-1460. doi:10.1249/01.MSS.0000078932.61440.A2
[13] [13] Le Masurier, G.C., Lee, S.M. and Tudor-Locke, C. (2004) Motion sensor accuracy under controlled and free-living conditions. Medicine & Science in Sports & Exercise, 36, 905-910. doi:10.1249/01.MSS.0000126777.50188.73
[14] [14] Bland, J.M. and Altman, D.G. (1999) Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8, 135-160. doi:10.1191/096228099673819272
[15] [15] Bland, J.M. and Altman, D.G. (2003) Applying the right statistics: Analyses of measurement studies. Ultrasound in Obstetrics and Gynecology, 22, 85-93. doi:10.1002/uog.122
[16] [16] Brown, M.B. and Forsythe, A.B. (1974) Robust tests for equality of variances. Journal of the American Statistical Association, 69, 364-367. doi:10.2307/2285659
[17] [17] Tudor-Locke, C., Giles-Corti, B., Knuiman, M. and McCormack, G. (2008) Tracking of pedometer-determined physical activity in adults who relocate: Results from RESIDE. International Journal of Behavioral Nutrition and Physical Activity, 5, doi:10.1186/1479-5868-5-39
[18] [18] Tudor-Locke, C.E. and Myers, A.M. (2001) Methodological considerations for researchers and practitioners using pedometers to measure physical (ambulatory) activity. Research Quarterly for Exercise and Sport, 72, 1-12.
[19] [19] Tudor-Locke, C., Myers, A.M., Bell, R.C., Harris, S.B. and Rodger, N.W. (2002) Preliminary outcome evaluation of the First Step Program: a daily physical activity intervention for individuals with type 2 diabetes. Patient Education and Counseling, 47, 23-28. doi:10.1016/S0738-3991(01)00169-0
[20] [20] Tudor-Locke, C. and Bassett Jr, D.R. (2004) How many steps/ day are enough? Preliminary pedometer indices for public health. Sports Medicine, 34, 1-8. doi:10.2165/00007256-200434010-00001
[21] [21] Crouter, S.E., Schneider, P.L. and Bassett, D.R. (2005) Spring-Levered versus Piezo-Electric Pedometer Accuracy in Overweight and Obese Adults. Medicine & Science in Sports & Exercise, 37, 1673-1679. doi:10.1249/01.mss.0000181677.36658.a8
[22] [22] Levine, J.A., McCrady, S.K., Lanningham-Foster, L.M., Kane, P.H., Foster, R.C. and Manohar, C.U. (2008) The role of free-living daily walking in human weight gain and obesity. Diabetes, 57, 548-554. doi:10.2337/db07-0815

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.