Discriminatory capacity of the Brief Physical Activity Assessment Tool

Authors

DOI:

https://doi.org/10.12820/rbafs.31e0449

Keywords:

Exercise, Fitness trackers, Validation study

Abstract

Introduction: Assessing physical activity (PA) levels in individuals using most subjective questionnaires is difficult, mainly because of their length and complexity. Objective: To evaluate the discriminatory capacity of the Brief Physical Activity Assessment Tool (BPAAT) classifications in relation to objectively measured PA parameters. Methods: Adult individuals (18-59 years) were included. The discriminatory capacity of the BPAAT was objectively compared using triaxial accelerometers worn for five consecutive days. Results: Of the 385 individuals screened for eligibility, 169 individuals were evaluated. The BPAAT was able to categorize participants in the study as sufficiently and insufficiently active for the objective accelerometry variables of counts per minute (cpm), metabolic equivalent of task (MET), and number of steps (Cohen’s d values = -0.57 [-0.89; -0.25]; -0.59 [-0.91; -0.27]; -0.52 [-0.84; -0.20], respectively). The same was observed for the times in the different PA classifications. Conclusion: The classifications obtained through BPAAT demonstrated the ability to objectively discriminate individuals in accelerometry-derived measures, such as cpm, MET, time at different intensities of PA, and number of steps.

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Published

06/24/2026

How to Cite

1.
Macena M de L, Paula DT da C, Gama IR de S, Soares DB, Ferro DC, Carnaúba RTL, et al. Discriminatory capacity of the Brief Physical Activity Assessment Tool. Rev. Bras. Ativ. Fís. Saúde [Internet]. 2026 Jun. 24 [cited 2026 Oct. 1];31:1-9. Available from: https://rbafs.org.br/RBAFS/article/view/15538

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Original Articles