Accuracy of the actibelt ® accelerometer for measuring walking speed in a controlled environment among persons with multiple sclerosis

Robert W Motl, Madeline Weikert, Yoojin Suh, Jacob J Sosnoff, John Pula, Cristina Soaz, Michaela Schimpl, Christian Lederer, Martin Daumer

Research output: Contribution to journalArticle

Abstract

Background: Advances in portable sensor technology have opened an era for objective, real-life monitoring of walking speed in persons with multiple sclerosis (MS). Purpose: The present study examined the accuracy of the actibelt ® accelerometer for measuring walking speed during a standard 6-min walk (6MW) and the possibility that disability status influenced the degree of accuracy among persons with MS. Methods: On a single testing session, 51 persons with MS and Expanded Disability Status Scale scores between 2.0 and 6.5 performed a 6MW while wearing an actibelt ® in the body's sagittal symmetry plane and close to the body's centre of mass. Results: All 51 participants completed the 6MW without stopping, falling, or any adverse events, and the actibelt ® provided walking speed data for each of the participants. The actibelt ® significantly overestimated walking speed (actual minus actibelt ®) by a mean±standard deviation of -0.12±0.17m/s for the overall sample (p<0.0001). There was no significant overestimation in the sample with mild disability (-0.02±0.11m/s), but there was in the samples with moderate (-0.10±0.16m/s) and severe (-0.26±0.12m/s) disability. Conclusion: The actibelt ® is ready for real-life monitoring of walking speed in persons with mild MS, but caution is necessary when interpreting the accuracy of the walking speed data for those with MS who have moderate and severe disability.

Original languageEnglish (US)
Pages (from-to)192-196
Number of pages5
JournalGait and Posture
Volume35
Issue number2
DOIs
StatePublished - Feb 1 2012

Fingerprint

Controlled Environment
Multiple Sclerosis
Accidental Falls
Walking Speed
Technology

Keywords

  • Free-living
  • Multiple sclerosis
  • Validity
  • Walking

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Rehabilitation
  • Biophysics

Cite this

Accuracy of the actibelt ® accelerometer for measuring walking speed in a controlled environment among persons with multiple sclerosis. / Motl, Robert W; Weikert, Madeline; Suh, Yoojin; Sosnoff, Jacob J; Pula, John; Soaz, Cristina; Schimpl, Michaela; Lederer, Christian; Daumer, Martin.

In: Gait and Posture, Vol. 35, No. 2, 01.02.2012, p. 192-196.

Research output: Contribution to journalArticle

Motl, Robert W ; Weikert, Madeline ; Suh, Yoojin ; Sosnoff, Jacob J ; Pula, John ; Soaz, Cristina ; Schimpl, Michaela ; Lederer, Christian ; Daumer, Martin. / Accuracy of the actibelt ® accelerometer for measuring walking speed in a controlled environment among persons with multiple sclerosis. In: Gait and Posture. 2012 ; Vol. 35, No. 2. pp. 192-196.
@article{afacd72726794efe8c60a973942faa1b,
title = "Accuracy of the actibelt {\circledR} accelerometer for measuring walking speed in a controlled environment among persons with multiple sclerosis",
abstract = "Background: Advances in portable sensor technology have opened an era for objective, real-life monitoring of walking speed in persons with multiple sclerosis (MS). Purpose: The present study examined the accuracy of the actibelt {\circledR} accelerometer for measuring walking speed during a standard 6-min walk (6MW) and the possibility that disability status influenced the degree of accuracy among persons with MS. Methods: On a single testing session, 51 persons with MS and Expanded Disability Status Scale scores between 2.0 and 6.5 performed a 6MW while wearing an actibelt {\circledR} in the body's sagittal symmetry plane and close to the body's centre of mass. Results: All 51 participants completed the 6MW without stopping, falling, or any adverse events, and the actibelt {\circledR} provided walking speed data for each of the participants. The actibelt {\circledR} significantly overestimated walking speed (actual minus actibelt {\circledR}) by a mean±standard deviation of -0.12±0.17m/s for the overall sample (p<0.0001). There was no significant overestimation in the sample with mild disability (-0.02±0.11m/s), but there was in the samples with moderate (-0.10±0.16m/s) and severe (-0.26±0.12m/s) disability. Conclusion: The actibelt {\circledR} is ready for real-life monitoring of walking speed in persons with mild MS, but caution is necessary when interpreting the accuracy of the walking speed data for those with MS who have moderate and severe disability.",
keywords = "Free-living, Multiple sclerosis, Validity, Walking",
author = "Motl, {Robert W} and Madeline Weikert and Yoojin Suh and Sosnoff, {Jacob J} and John Pula and Cristina Soaz and Michaela Schimpl and Christian Lederer and Martin Daumer",
year = "2012",
month = "2",
day = "1",
doi = "10.1016/j.gaitpost.2011.09.005",
language = "English (US)",
volume = "35",
pages = "192--196",
journal = "Gait and Posture",
issn = "0966-6362",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Accuracy of the actibelt ® accelerometer for measuring walking speed in a controlled environment among persons with multiple sclerosis

AU - Motl, Robert W

AU - Weikert, Madeline

AU - Suh, Yoojin

AU - Sosnoff, Jacob J

AU - Pula, John

AU - Soaz, Cristina

AU - Schimpl, Michaela

AU - Lederer, Christian

AU - Daumer, Martin

PY - 2012/2/1

Y1 - 2012/2/1

N2 - Background: Advances in portable sensor technology have opened an era for objective, real-life monitoring of walking speed in persons with multiple sclerosis (MS). Purpose: The present study examined the accuracy of the actibelt ® accelerometer for measuring walking speed during a standard 6-min walk (6MW) and the possibility that disability status influenced the degree of accuracy among persons with MS. Methods: On a single testing session, 51 persons with MS and Expanded Disability Status Scale scores between 2.0 and 6.5 performed a 6MW while wearing an actibelt ® in the body's sagittal symmetry plane and close to the body's centre of mass. Results: All 51 participants completed the 6MW without stopping, falling, or any adverse events, and the actibelt ® provided walking speed data for each of the participants. The actibelt ® significantly overestimated walking speed (actual minus actibelt ®) by a mean±standard deviation of -0.12±0.17m/s for the overall sample (p<0.0001). There was no significant overestimation in the sample with mild disability (-0.02±0.11m/s), but there was in the samples with moderate (-0.10±0.16m/s) and severe (-0.26±0.12m/s) disability. Conclusion: The actibelt ® is ready for real-life monitoring of walking speed in persons with mild MS, but caution is necessary when interpreting the accuracy of the walking speed data for those with MS who have moderate and severe disability.

AB - Background: Advances in portable sensor technology have opened an era for objective, real-life monitoring of walking speed in persons with multiple sclerosis (MS). Purpose: The present study examined the accuracy of the actibelt ® accelerometer for measuring walking speed during a standard 6-min walk (6MW) and the possibility that disability status influenced the degree of accuracy among persons with MS. Methods: On a single testing session, 51 persons with MS and Expanded Disability Status Scale scores between 2.0 and 6.5 performed a 6MW while wearing an actibelt ® in the body's sagittal symmetry plane and close to the body's centre of mass. Results: All 51 participants completed the 6MW without stopping, falling, or any adverse events, and the actibelt ® provided walking speed data for each of the participants. The actibelt ® significantly overestimated walking speed (actual minus actibelt ®) by a mean±standard deviation of -0.12±0.17m/s for the overall sample (p<0.0001). There was no significant overestimation in the sample with mild disability (-0.02±0.11m/s), but there was in the samples with moderate (-0.10±0.16m/s) and severe (-0.26±0.12m/s) disability. Conclusion: The actibelt ® is ready for real-life monitoring of walking speed in persons with mild MS, but caution is necessary when interpreting the accuracy of the walking speed data for those with MS who have moderate and severe disability.

KW - Free-living

KW - Multiple sclerosis

KW - Validity

KW - Walking

UR - http://www.scopus.com/inward/record.url?scp=84856678167&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856678167&partnerID=8YFLogxK

U2 - 10.1016/j.gaitpost.2011.09.005

DO - 10.1016/j.gaitpost.2011.09.005

M3 - Article

C2 - 21945386

AN - SCOPUS:84856678167

VL - 35

SP - 192

EP - 196

JO - Gait and Posture

JF - Gait and Posture

SN - 0966-6362

IS - 2

ER -