ArticlePloS one2020
Number of days required to estimate physical activity constructs objectively measured in different age groups: Findings from three Brazilian (Pelotas) population-based birth cohorts.
Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.
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Who cites it
28 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A systematic review of the validity, reliability, and feasibility of measurement tools used to assess the physical activity and sedentary behaviour of pre-school aged children.The international journal of behavioral nutrition and physical activity · 2021Pooled it
- Initial outcomes from the Confident Moves online intervention to promote physical activity in adults with obesity: a longitudinal feasibility and acceptability pilot trial.BMC public health · 2025Trial
- Inspiratory muscle training enhances recovery post-COVID-19: a randomised controlled trial.The European respiratory journal · 2022Trial
- Effectiveness and cost-effectiveness of the GoActive intervention to increase physical activity among UK adolescents: A cluster randomised controlled trial.PLoS medicine · 2020Trial
- Examining Associations Between Preschool Executive Control and Adolescent Physical Activity, Day-to-Day Physical Activity Variability, and Sedentary Behavior.Journal of physical activity & health · 2026Article
- Home-based exercise and physical activity intervention after kidney transplantation: impact of exercise intensity (PHOENIX-Kidney). Protocol for a multicentre randomized controlled trial.Clinical kidney journal · 2025Article
- Device-measured and self-reported physical activity during the first two years postpartum in women with recent gestational diabetes: evidence from the LINDA-Brasil study.Archives of endocrinology and metabolism · 2025Article
- Volume and Intensity of Walking and Risk of Chronic Low Back Pain.JAMA network open · 2025Article
- Physical activity and BMI inequalities throughout childhood: a Brazilian birth cohort study.Lancet regional health. Americas · 2025Article
- Lessons from 13 years of accelerometry measurements in five Brazilian cohorts: methodological aspects.Cadernos de saude publica · 2025Article
- Wearable Sensors as a Preoperative Assessment Tool: A Review.Sensors (Basel, Switzerland) · 2024Review
- Article
- The Use of Wearable Activity Monitors to Measure Upper Limb Physical Activity After Axillary Lymph Node Dissection and Sentinel Lymph Node Biopsy.Annals of surgical oncology · 2023Observational
- Physical Activity Assessed by Wrist and Thigh Worn Accelerometry and Associations with Cardiometabolic Health.Sensors (Basel, Switzerland) · 2023Article
- FAMIly Physical Activity, Sedentary behaviour and Sleep (FAMIPASS) study: protocol for a cross-sectional study.BMJ open · 2023Article
- KLB and NOX4 expression levels as potential blood-based transcriptional biomarkers of physical activity in children.Scientific reports · 2023Article
- How many days of continuous physical activity monitoring reliably represent time in different intensities in cancer survivors.PloS one · 2023Article
- A Call for Action on Chronic Respiratory Diseases within Physical Activity Policies, Guidelines and Action Plans: Let's Move!International journal of environmental research and public health · 2022Article
- Longitudinal change in physical activity and adiposity in the transition from adolescence to early adulthood: the 1993 Pelotas cohort study.The international journal of behavioral nutrition and physical activity · 2022Article
- Assessment of Physical Activity in Adults Using Wrist Accelerometers.Epidemiologic reviews · 2022Review
Corrections and comments
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Authors and funding
9 authors.
Funding
Abstract
purposeThe present study aims to estimate the minimum number of accelerometer measurement days needed to estimate habitual physical activity (PA) among 6- (2010), 18- (2011) and 30- (2012) year-old participants, belonging to three population-based Brazilian birth cohorts.
methodPA was assessed by triaxial wrist-worn GENEActiv accelerometers and the present analysis is restricted to participants with at least 6 consecutive days of measurement. Accelerometer raw data were analyzed with R-package GGIR. Description of PA measures (overall PA, moderate-to-vigorous PA (MVPA), light PA (LPA)) on weekdays and weekend days were conducted, and statistical differences were tested with chi-squared and Kruskal-Wallis tests. Spearman Brown Formulae was applied to test reliability of different number of days of accelerometer use.
resultsDifferences between week and weekend days regarding LPA, MVPA and overall PA, were only observed among 30-year-olds. Higher levels of MVPA (p = 0.006) and overall PA (p<0.001) were identified on weekdays. For overall PA, to achieve a reliability coefficient >0.70, two and three days of measurement were needed in adults and children, respectively. For LPA, a reliability coefficient >0.70 was achieved with five days in 6-year-old children, three days in 18-year-old young adults, and four days in 30-year-old adults. Considering MVPA, four days would be necessary to represent a week of measurement among all cohort groups.
conclusionOur results show that four and five measurement days are needed to estimate all habitual PA constructs, for children and adults, respectively. Also, among 30-year-old adults, it is important to make efforts towards weekend days measurement.
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