Cargando…
Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning
This study aimed to investigate the accuracy and reliability of hip and ankle worn Actigraph GT3X+ (AG) accelerometers to measure steps as a function of gait speed. Additionally, the effect of the low frequency extension filter (LFEF) on the step accuracy was determined. Thirty healthy individuals w...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124409/ https://www.ncbi.nlm.nih.gov/pubmed/34062943 http://dx.doi.org/10.3390/s21093154 |
_version_ | 1783693196985892864 |
---|---|
author | Bezuidenhout, Lucian Thurston, Charlotte Hagströmer, Maria Moulaee Conradsson, David |
author_facet | Bezuidenhout, Lucian Thurston, Charlotte Hagströmer, Maria Moulaee Conradsson, David |
author_sort | Bezuidenhout, Lucian |
collection | PubMed |
description | This study aimed to investigate the accuracy and reliability of hip and ankle worn Actigraph GT3X+ (AG) accelerometers to measure steps as a function of gait speed. Additionally, the effect of the low frequency extension filter (LFEF) on the step accuracy was determined. Thirty healthy individuals walked straight and walked with continuous turns in different gait speeds. Number of steps were recorded with a hip and ankle worn AG, and with a Stepwatch (SW) activity monitor positioned around the right ankle, which was used as a reference for step count. The percentage agreement, interclass correlation coefficients and Bland–Altmann plots were determined between the AG and the reference SW across gait speeds for the two walking conditions. The ankle worn AG with the default filter was the most sensitive for step detection at >0.6 m/s, whilst accurate step detection for gait speeds < 0.6 m/s were only observed when applying the LFEF. The hip worn AG with the default filter showed poor accuracy (12–78%) at gait speeds < 1.0 m/s whereas the accuracy increased to >87% for gait speeds < 1.0 m/s when applying the LFEF. Ankle worn AG was the most sensitive to measure steps at a vast range of gait speeds. Our results suggest that sensor placement and filter settings need to be taken into account to provide accurate estimates of step counts. |
format | Online Article Text |
id | pubmed-8124409 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81244092021-05-17 Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning Bezuidenhout, Lucian Thurston, Charlotte Hagströmer, Maria Moulaee Conradsson, David Sensors (Basel) Communication This study aimed to investigate the accuracy and reliability of hip and ankle worn Actigraph GT3X+ (AG) accelerometers to measure steps as a function of gait speed. Additionally, the effect of the low frequency extension filter (LFEF) on the step accuracy was determined. Thirty healthy individuals walked straight and walked with continuous turns in different gait speeds. Number of steps were recorded with a hip and ankle worn AG, and with a Stepwatch (SW) activity monitor positioned around the right ankle, which was used as a reference for step count. The percentage agreement, interclass correlation coefficients and Bland–Altmann plots were determined between the AG and the reference SW across gait speeds for the two walking conditions. The ankle worn AG with the default filter was the most sensitive for step detection at >0.6 m/s, whilst accurate step detection for gait speeds < 0.6 m/s were only observed when applying the LFEF. The hip worn AG with the default filter showed poor accuracy (12–78%) at gait speeds < 1.0 m/s whereas the accuracy increased to >87% for gait speeds < 1.0 m/s when applying the LFEF. Ankle worn AG was the most sensitive to measure steps at a vast range of gait speeds. Our results suggest that sensor placement and filter settings need to be taken into account to provide accurate estimates of step counts. MDPI 2021-05-01 /pmc/articles/PMC8124409/ /pubmed/34062943 http://dx.doi.org/10.3390/s21093154 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Communication Bezuidenhout, Lucian Thurston, Charlotte Hagströmer, Maria Moulaee Conradsson, David Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title | Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title_full | Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title_fullStr | Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title_full_unstemmed | Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title_short | Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning |
title_sort | validity of hip and ankle worn actigraph accelerometers for measuring steps as a function of gait speed during steady state walking and continuous turning |
topic | Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124409/ https://www.ncbi.nlm.nih.gov/pubmed/34062943 http://dx.doi.org/10.3390/s21093154 |
work_keys_str_mv | AT bezuidenhoutlucian validityofhipandanklewornactigraphaccelerometersformeasuringstepsasafunctionofgaitspeedduringsteadystatewalkingandcontinuousturning AT thurstoncharlotte validityofhipandanklewornactigraphaccelerometersformeasuringstepsasafunctionofgaitspeedduringsteadystatewalkingandcontinuousturning AT hagstromermaria validityofhipandanklewornactigraphaccelerometersformeasuringstepsasafunctionofgaitspeedduringsteadystatewalkingandcontinuousturning AT moulaeeconradssondavid validityofhipandanklewornactigraphaccelerometersformeasuringstepsasafunctionofgaitspeedduringsteadystatewalkingandcontinuousturning |