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    Minimum Wear Duration for the activPALTM Professional Activity Monitor in Adolescent Females

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    eResearch%204667%20aam.pdf (280.7Kb)
    Date
    2017-01-25
    Author
    Dowd, Kieran P.
    Purtill, Helen
    Harrington, Deirdre M.
    Hislop, Jane
    Reilly, John J.
    Donnelly, Alan E.
    Metadata
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    Citation
    Dowd, K., Purtill, H., Harrington, D., Hislop, J., Reilly, J. & Donnelly, A. (2017) Minimum Wear Duration for the activPALTM Professional Activity Monitor in Adolescent Females, Pediatric Exercise Science, vol. 29, , pp. 427-433,
    Abstract
    Objectives: This study aims to determine the minimum number of days of monitoring required to reliably predict sitting/lying time, standing time, light intensity physical activity (LIPA), moderate-to-vigorous intensity physical activity (MVPA) and steps in adolescent females. Methods: 195 adolescent females (mean age=15.7 years; SD=0.9) participated in the study. Participants wore the activPAL activity monitor for a seven day protocol. The amount of time spent sitting/lying, standing, in LIPA and in MVPA and the number of steps per day were quantified. Spearman-Brown Prophecy formulae were used to predict the number of days of data required to achieve an intraclass correlation coefficient of both 0.7 and 0.8. Results: For the percentage of the waking day spent sitting/lying, standing, in LIPA and in MVPA, a minimum of 9 days of accelerometer recording is required to achieve a reliability of ≥0.7, while a minimum of 15 days is required to achieve a reliability of ≥0.8. For steps, a minimum of 12 days of recording is required to achieve a reliability of ≥0.7, with 21 days to achieve a reliability of ≥0.8. Conclusions: Future research in adolescent females should collect a minimum of 9 days of accelerometer data to reliably estimate sitting/lying time, standing time, LIPA and MVPA, while 12 days is required to reliably estimate steps.
    Official URL
    http://dx.doi.org/10.1123/pes.2016-0188
    URI
    https://eresearch.qmu.ac.uk/handle/20.500.12289/4667
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