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Minimum wear duration for the activPAL professional activity monitor in adolescent females
Date
2017
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. Conclusion: 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.
Supervisor
Description
peer-reviewed
Publisher
Human Kinetics Publishers Inc.
Citation
Pediatric Exercise Science: 29 (3), pp. 427-433
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Funding code
Funding Information
Irish Research Council (IRC)
Sustainable Development Goals
External Link
Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/1.0/