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Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities
BACKGROUND: Accelerometry has not been calibrated for the estimation of physical activity in children with intellectual disabilities (ID), raising questions regarding the validity of interpreting accelerometer data in this population. Various protocols and criterion measures have been used in calibr...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5153872/ https://www.ncbi.nlm.nih.gov/pubmed/27965797 http://dx.doi.org/10.1186/s40814-015-0014-2 |
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author | McGarty, Arlene M. Penpraze, Victoria Melville, Craig A. |
author_facet | McGarty, Arlene M. Penpraze, Victoria Melville, Craig A. |
author_sort | McGarty, Arlene M. |
collection | PubMed |
description | BACKGROUND: Accelerometry has not been calibrated for the estimation of physical activity in children with intellectual disabilities (ID), raising questions regarding the validity of interpreting accelerometer data in this population. Various protocols and criterion measures have been used in calibration studies involving typically developing (TD) children; however, the suitability of these activities and measures for children with ID is unknown. Therefore, this study aimed to test the feasibility of a laboratory-based calibration protocol for children with ID. Specifically, the feasibility of activities, measurements, and recruitment was investigated. METHODS: Five children with mild to moderate ID (10.20 ± .98 years) and a comparative sample of five TD children (12.40 ± .01 years) participated in this study. Participants performed a free-living and treadmill-based activity protocol during two laboratory-based sessions. Activities were performed for 5 min and ranged from sedentary to vigorous intensity. Treadmill activities ranged from 3 to 8 km/h, and free-living activities included watching a DVD, passing a football, and jumping jacks. Resting energy expenditure was measured, and a graded exercise test was used to assess cardiorespiratory fitness. Breath-by-breath respiratory gas exchange and accelerometry were continually measured during all activities. Feasibility was assessed using observations, activity completion rates, and respiratory data. RESULTS: All TD participants and one participant with ID completed the protocol. The physical demands of the treadmill activities affected the completion rate for participants with ID. No participant met the maximal criteria for the graded exercise test or attained a steady state during the resting measurements. Limitations were identified with the usability of respiratory gas exchange equipment and the validity of measurements. The school-based recruitment strategy was not effective, with a participation rate of 6 %. A significant (z = 13.21, p < .0001) difference in the relationship of [Formula: see text] and accelerometry was identified between ID and TD participants. CONCLUSIONS: Due to issues with the usability and validity of breath-by-breath respiratory gas exchange and recruitment, a laboratory-based calibration protocol is currently not feasible for children with ID. An alternative field-based protocol with a non-invasive criterion measure should be considered for future studies. |
format | Online Article Text |
id | pubmed-5153872 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-51538722016-12-13 Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities McGarty, Arlene M. Penpraze, Victoria Melville, Craig A. Pilot Feasibility Stud Research BACKGROUND: Accelerometry has not been calibrated for the estimation of physical activity in children with intellectual disabilities (ID), raising questions regarding the validity of interpreting accelerometer data in this population. Various protocols and criterion measures have been used in calibration studies involving typically developing (TD) children; however, the suitability of these activities and measures for children with ID is unknown. Therefore, this study aimed to test the feasibility of a laboratory-based calibration protocol for children with ID. Specifically, the feasibility of activities, measurements, and recruitment was investigated. METHODS: Five children with mild to moderate ID (10.20 ± .98 years) and a comparative sample of five TD children (12.40 ± .01 years) participated in this study. Participants performed a free-living and treadmill-based activity protocol during two laboratory-based sessions. Activities were performed for 5 min and ranged from sedentary to vigorous intensity. Treadmill activities ranged from 3 to 8 km/h, and free-living activities included watching a DVD, passing a football, and jumping jacks. Resting energy expenditure was measured, and a graded exercise test was used to assess cardiorespiratory fitness. Breath-by-breath respiratory gas exchange and accelerometry were continually measured during all activities. Feasibility was assessed using observations, activity completion rates, and respiratory data. RESULTS: All TD participants and one participant with ID completed the protocol. The physical demands of the treadmill activities affected the completion rate for participants with ID. No participant met the maximal criteria for the graded exercise test or attained a steady state during the resting measurements. Limitations were identified with the usability of respiratory gas exchange equipment and the validity of measurements. The school-based recruitment strategy was not effective, with a participation rate of 6 %. A significant (z = 13.21, p < .0001) difference in the relationship of [Formula: see text] and accelerometry was identified between ID and TD participants. CONCLUSIONS: Due to issues with the usability and validity of breath-by-breath respiratory gas exchange and recruitment, a laboratory-based calibration protocol is currently not feasible for children with ID. An alternative field-based protocol with a non-invasive criterion measure should be considered for future studies. BioMed Central 2015-05-24 /pmc/articles/PMC5153872/ /pubmed/27965797 http://dx.doi.org/10.1186/s40814-015-0014-2 Text en © McGarty et al.; licensee BioMed Central. 2015 This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research McGarty, Arlene M. Penpraze, Victoria Melville, Craig A. Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title | Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title_full | Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title_fullStr | Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title_full_unstemmed | Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title_short | Feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
title_sort | feasibility of a laboratory-based accelerometer calibration protocol for children with intellectual disabilities |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5153872/ https://www.ncbi.nlm.nih.gov/pubmed/27965797 http://dx.doi.org/10.1186/s40814-015-0014-2 |
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