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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Agreement Between GT3X Accelerometer and ActivPAL Inclinometer for Estimating and Detecting Changes in Different Contexts of Sedentary Time Among Adolescents

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Silva, Danilo R. [1, 2] ; Minderico, Claudia S. [3, 4] ; Judice, Pedro B. [3, 4] ; Werneck, Andre O. [2, 5] ; Ohara, David [2] ; Cyrino, Edilson S. [2] ; Sardinha, Luis B. [3]
Total Authors: 7
[1] Fed Univ Sergipe UFS, Dept Phys Educ, Sao Cristovao - Brazil
[2] Univ Estadual Londrina, Study & Res Grp Metab Nutr & Exercise GEPEMENE, Londrina - Brazil
[3] Univ Lisbon, Fac Human Kinet, CIPER, Exercise & Hlth Lab, Lisbon - Portugal
[4] Lusofona Univ, Lisbon - Portugal
[5] Sao Paulo State Univ, UNESP, Dept Phys Educ, Presidente Prudente - Brazil
Total Affiliations: 5
Document type: Journal article
Source: JOURNAL OF PHYSICAL ACTIVITY & HEALTH; v. 16, n. 9, p. 780-784, SEP 2019.
Web of Science Citations: 0

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 froman intervention in school hours (ActivPAL = -34.7 min center dot 9 h -1 vs GT3X= + 6.7 min center dot 9 h -1; P <.05). Conclusions: The authors conclude that GT3X (cut-point of < 100 counts center dot min -1) overestimated sedentary time of free-living activities and did not detect changes resulting from a classroom standing desk intervention in adolescents. (AU)

FAPESP's process: 17/27234-2 - Longitudinal association between biological maturation, body fatness and sports participation predicting the risk of metabolic syndrome and C-reactive protein: structural equation modelling (ABCD - growth study)
Grantee:André de Oliveira Werneck
Support type: Scholarships in Brazil - Master