Author(s): Silva, Danilo R. ; Minderico, Cláudia S. ; Júdice, Pedro B. ; Werneck, André O. [UNESP] ; Ohara, David ; Cyrino, Edilson S. ; Sardinha, Luís B.
Date: 2020
Persistent ID: http://hdl.handle.net/11449/198253
Origin: Oasisbr
Subject(s): School-based intervention; Sitting; Standing desk
Made available in DSpace on 2020-12-12T01:07:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação para a Ciência e a Tecnologia
Background: This investigation aimed to analyze the agreement between the GT3X accelerometer and the ActivPAL inclinometer for estimating and detecting changes in sedentary behavior of different contexts among adolescents. Methods: Secondary data from an intervention using standing desks in the classroom conducted within 2 sixth-grade classes (intervention [n = 22] and control [n = 27]) were used. The intervention took place over 16 weeks, with activity assessments (ActivPAL and GT3X) being performed 7 days before and in the last week of the intervention. Baseline information from both groups was considered for cross-sectional analysis (209 valid days), while data from 20 participants (intervention group) were used for longitudinal analysis. Results: The authors observed that GT3X overestimated sedentary time at school (16.8%), after school (13.5%), and during weekends (7.3%) compared with ActivPAL (P < .05). Outside the school (after school [r = −.188] and on weekends [r = −.260]), there was a trend to higher overestimation among adolescents with less sedentary behavior. Longitudinally, the GT3X was unable to detect changes resulting from an intervention in school hours (ActivPAL = −34.7 min·9 h−1 vs GT3X = +6.7 min·9 h−1; P < .05). Conclusions: The authors conclude that GT3X (cut-point of <100 counts·min−1) overestimated sedentary time of free-living activities and did not detect changes resulting from a classroom standing desk intervention in adolescents.
Department of Physical Education Federal University of Sergipe – UFS
Department of Physical Education São Paulo State University UNESP
Study and Research Group in Metabolism Nutrition and Exercise – GEPEMENE Londrina State University
Exercise and Health Laboratory CIPER Faculty of Human Kinetics University of Lisbon
Lusofona University
Department of Physical Education São Paulo State University UNESP
Fundação para a Ciência e a Tecnologia: SFRH/ BPD/115977/2016
