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Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women
BACKGROUND: Self-reported physical activity measures continue to be validated against accelerometers; however, the absence of standardized, accelerometer moderate-to-vigorous physical activity (MVPA) definitions has made comparisons across studies difficult. Furthermore, recent accelerometer models...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694656/ https://www.ncbi.nlm.nih.gov/pubmed/26713857 http://dx.doi.org/10.1371/journal.pone.0145950 |
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author | Shiroma, Eric J. Cook, Nancy R. Manson, JoAnn E. Buring, Julie E. Rimm, Eric B. Lee, I-Min |
author_facet | Shiroma, Eric J. Cook, Nancy R. Manson, JoAnn E. Buring, Julie E. Rimm, Eric B. Lee, I-Min |
author_sort | Shiroma, Eric J. |
collection | PubMed |
description | BACKGROUND: Self-reported physical activity measures continue to be validated against accelerometers; however, the absence of standardized, accelerometer moderate-to-vigorous physical activity (MVPA) definitions has made comparisons across studies difficult. Furthermore, recent accelerometer models assess accelerations in three axes, instead of only the vertical axis, but validation studies have yet to take incorporate triaxial data. METHODS: Participants (n = 10 115) from the Women’s Health Study wore a hip-worn accelerometer (ActiGraph GT3X+) for seven days during waking hours (2011–2014). Women then completed a physical activity questionnaire. We compared self-reported with accelerometer-assessed MVPA, using four established cutpoints for MVPA: three using only vertical axis data (760, 1041 and 1952 counts per minute (cpm)) and one using triaxial data (2690 cpm). RESULTS: According to self-reported physical activity, 66.6% of women met the US federal physical activity guidelines, engaging in ≥150 minutes per week of MVPA. The percent of women who met guidelines varied widely depending on the accelerometer MVPA definition (760 cpm: 50.0%, 1041 cpm: 33.0%, 1952 cpm: 13.4%, and 2690 cpm: 19.3%). CONCLUSIONS: Triaxial count data do not substantially reduce the difference between self-reported and accelerometer-assessed MVPA. |
format | Online Article Text |
id | pubmed-4694656 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-46946562016-01-13 Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women Shiroma, Eric J. Cook, Nancy R. Manson, JoAnn E. Buring, Julie E. Rimm, Eric B. Lee, I-Min PLoS One Research Article BACKGROUND: Self-reported physical activity measures continue to be validated against accelerometers; however, the absence of standardized, accelerometer moderate-to-vigorous physical activity (MVPA) definitions has made comparisons across studies difficult. Furthermore, recent accelerometer models assess accelerations in three axes, instead of only the vertical axis, but validation studies have yet to take incorporate triaxial data. METHODS: Participants (n = 10 115) from the Women’s Health Study wore a hip-worn accelerometer (ActiGraph GT3X+) for seven days during waking hours (2011–2014). Women then completed a physical activity questionnaire. We compared self-reported with accelerometer-assessed MVPA, using four established cutpoints for MVPA: three using only vertical axis data (760, 1041 and 1952 counts per minute (cpm)) and one using triaxial data (2690 cpm). RESULTS: According to self-reported physical activity, 66.6% of women met the US federal physical activity guidelines, engaging in ≥150 minutes per week of MVPA. The percent of women who met guidelines varied widely depending on the accelerometer MVPA definition (760 cpm: 50.0%, 1041 cpm: 33.0%, 1952 cpm: 13.4%, and 2690 cpm: 19.3%). CONCLUSIONS: Triaxial count data do not substantially reduce the difference between self-reported and accelerometer-assessed MVPA. Public Library of Science 2015-12-29 /pmc/articles/PMC4694656/ /pubmed/26713857 http://dx.doi.org/10.1371/journal.pone.0145950 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. |
spellingShingle | Research Article Shiroma, Eric J. Cook, Nancy R. Manson, JoAnn E. Buring, Julie E. Rimm, Eric B. Lee, I-Min Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title | Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title_full | Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title_fullStr | Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title_full_unstemmed | Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title_short | Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women |
title_sort | comparison of self-reported and accelerometer-assessed physical activity in older women |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694656/ https://www.ncbi.nlm.nih.gov/pubmed/26713857 http://dx.doi.org/10.1371/journal.pone.0145950 |
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