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Impact of varying accelerometer epoch length on physical activity patterns in adults: Considerations for public health.

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Title: Impact of varying accelerometer epoch length on physical activity patterns in adults: Considerations for public health.
Authors: Haddadj, Rayane1,2 (AUTHOR) hdj.rayane@gmail.com, Verdot, Charlotte2 (AUTHOR), Salanave, Benoît2 (AUTHOR), Deschamps, Valérie2 (AUTHOR), Vanhelst, Jérémy3 (AUTHOR)
Source: PLoS ONE. 12/31/2024, Vol. 19 Issue 12, p1-9. 9p.
Subject Terms: *SEDENTARY behavior, *FISHER exact test, *WEARABLE technology, *ADULTS, *PHYSICAL activity
Abstract: Background: To process wearables sensors data, end-users face a wide variety of choices influencing physical activity (PA) patterns estimation. This study investigated the impact of varying epoch length on PA patterns in adults and World Health Organization (WHO) PA guidelines prevalence, assessed by accelerometer. Methods: The study included 181 adults (18–74 years) from the Esteban Study (2014–2016). Participants wore an accelerometer for 7 consecutive days. Data were processed with ActiLife® software using epoch lengths from 1 to 60 seconds to assess PA patterns. Difference of PA patterns between epoch length was assessed using repeated measures ANOVA. Difference in meeting WHO PA guidelines was assesses using Fisher's exact test. Results: Significant changes were observed in sedentary behaviour and PA intensities with epoch length variation (p<0.001). Longer epochs led to reduced moderate and vigorous PA, increased light PA, and less sedentary time, affecting adherence to WHO PA guidelines. Conclusion: Result underline the importance of careful epoch length selection when processing accelerometer data to accurately assess sedentary behaviour and PA in adults. Shorter epochs seem preferable to capture short and spontaneous PA bouts and preventing underestimation of MVPA along with prolonged PA bouts. Further investigation including a PA reference measure is needed to confirm these findings and their implications for adult health. [ABSTRACT FROM AUTHOR]
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  Data: Impact of varying accelerometer epoch length on physical activity patterns in adults: Considerations for public health.
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  Data: Background: To process wearables sensors data, end-users face a wide variety of choices influencing physical activity (PA) patterns estimation. This study investigated the impact of varying epoch length on PA patterns in adults and World Health Organization (WHO) PA guidelines prevalence, assessed by accelerometer. Methods: The study included 181 adults (18–74 years) from the Esteban Study (2014–2016). Participants wore an accelerometer for 7 consecutive days. Data were processed with ActiLife&#174; software using epoch lengths from 1 to 60 seconds to assess PA patterns. Difference of PA patterns between epoch length was assessed using repeated measures ANOVA. Difference in meeting WHO PA guidelines was assesses using Fisher&#39;s exact test. Results: Significant changes were observed in sedentary behaviour and PA intensities with epoch length variation (p&lt;0.001). Longer epochs led to reduced moderate and vigorous PA, increased light PA, and less sedentary time, affecting adherence to WHO PA guidelines. Conclusion: Result underline the importance of careful epoch length selection when processing accelerometer data to accurately assess sedentary behaviour and PA in adults. Shorter epochs seem preferable to capture short and spontaneous PA bouts and preventing underestimation of MVPA along with prolonged PA bouts. Further investigation including a PA reference measure is needed to confirm these findings and their implications for adult health. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of PLoS ONE is the property of Public Library of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder&#39;s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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              Text: 12/31/2024
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