ArticlePloS one2021
The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07021144 (VA|PREVENTION), which is not on this map. Cited by 21 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
VA|PREVENTION: Randomized Controlled Trial of a Person-Centred Digital Intervention to Prevent Diabetes in High-Risk Adults
Who cites it
21 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- The Within-Subject Association of Physical Behavior and Affective Well-Being in Everyday Life: A Systematic Literature Review.Sports medicine (Auckland, N.Z.) · 2024Pooled it
- Systematic review of accelerometer-based methods for 24-h physical behavior assessment in young children (0-5 years old).The international journal of behavioral nutrition and physical activity · 2022Pooled it
- Physical activity in infancy is associated with body composition at age three.BMC public health · 2026Trial
- Impact of cut-point methods on classification of physical activity and sedentary behaviour of toddlers.BMC public health · 2025Trial
- A systematic review of prolonged posture monitoring with accelerometer-based wearable sensors.PLOS digital health · 2026Article
- A pilot study using actigraphy to examine activity performance and its relationship with activity capacity in adults with facioscapulohumeral muscular dystrophy.Journal of neuromuscular diseases · 2026Article
- Validation and optimisation of wearable accelerometer data pre-processing for digital measure implementation and development.PloS one · 2026Article
- Prospective association between descriptive accelerometer-derived physical behaviour metrics and cardiometabolic risk indicators in Dutch children: The ABCD study.Journal of exercise science and fitness · 2026Article
- Accumulation patterns of sedentary and breaks and adiposity risk in Chinese children and adolescents: a latent profile analysis.BMC public health · 2025Article
- Effects of a physical activity-enhanced curriculum on increasing physical activity and improving physical fitness in preschoolers: Study protocol for a cluster randomized controlled trial (KID-FIT study).Journal of exercise science and fitness · 2025Article
- Daily activity accumulation patterns and depressive symptoms among adolescents: a latent profile approach.Frontiers in psychology · 2025Article
- A standardised approach to quantifying activity in domestic dogs.Royal Society open science · 2024Article
- Accelerometer-measured sedentary volume and bouts during the segmented school day among Chinese school students.Journal of exercise science and fitness · 2024Article
- Are physical activity and sleep associated with emotional self-regulation in toddlers? a cross-sectional study.BMC public health · 2024Article
- Impact of varying accelerometer epoch length on physical activity patterns in adults: Considerations for public health.PloS one · 2024Article
- Floating Epoch Length Improves the Accuracy of Accelerometry-Based Estimation of Coincident Oxygen Consumption.Sensors (Basel, Switzerland) · 2023Article
- Feasibility of Actigraphy for Evaluating Sleep and Daytime Physical Activity in Children with Autism Spectrum Disorder.Journal of autism and developmental disorders · 2023Article
- Effect of Data Reduction Techniques on Daily Moderate to Vigorous Physical Activity Collected with ActiGraphJournal of clinical medicine · 2023Article
- Associations Among Physical Activity, Adiposity, and Insulin Resistance in Children Exposed In Utero to Maternal Obesity With and Without Gestational Diabetes.Pediatric exercise science · 2023Article
- Sedentary Patterns and Sit-to-Stand Transitions in Open Learning Spaces and Conventional Classrooms among Primary School Students.International journal of environmental research and public health · 2022Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We examined the influence of using different epoch lengths on the classification accuracy of laboratory-controlled sedentary behaviour (SB), and free-living total time and time spent in bouts of SB and moderate-to-vigorous physical activity (MVPA), in children and adolescents. We used two studies including accelerometer-derived data of: 1) controlled activities, i.e. seven sedentary, one standing and one dancing (n = 90); 2) free-living activities (n = 902). For the controlled-activity data, we calculated percentages of time classified as SB and MVPA. For the free-living data, we calculated medians (25th-75th percentiles) of total time and time spent in bouts of SB and MVPA. Applying 8counts/5seconds, 25counts/15seconds and 100counts/60seconds for SB on controlled-activity data revealed respectively (1) 92-96%, 89-99% and 98-100% of sedentary time accurately classified as SB (activity- and age-dependent); (2) 91-98%, 88-99% and 97-100% of standing time classified as SB (age-dependent); (3) 25-37%, 20-25% and 25-38% of dancing time classified as SB (age-dependent). Using longer epochs, children's total time in SB and MVPA decreased while time accumulated in bouts of SB and MVPA accumulated in bouts increased. We conclude that a 60-second epoch seems preferable when the aim is to classify sedentary behaviour, while a shorter epoch length is needed to capture children's short bursts of MPVA. Furthermore, we should be aware that a longer epoch results in averaging of intensities to the middle category.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.