Abstract
BACKGROUND: Few studies have studied ecological models of objectively measured moderate-to-vigorous physical activity (MVPA) in young children from middle-income countries. The purpose of this study was to examine potential correlates of objec¬tively measured MVPA in a sample of 9-11 year old Brazilian children. METHODS: Data from the Brazilian site of the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) were included in the analysis. An Actigraph GT3X+ accelerometer was used to monitor MVPA over 7 days. BMI and body fat percentage (BF%) were measured using a bioelectrical impedance scale. Questionnaires completed by the participants, their parents, and school personnel queried behavioral, family and home environment, and school environment correlates. Twenty two potential correlates of MVPA were examined using multi-level linear regression. All explanatory variables associated (p<0.10) with MVPA in univariate analyses were included in the final models. Variables that remained significant in the final models (p<0.05) were considered correlates of MVPA. Sex, ethnicity, school, number of siblings, and total annual household income were used as covariates in all multivariable models. RESULTS: A total of 328 participants (51.5% boys) were included in the analyses. Children averaged 59.3 min/day in MVPA (44.5% met MVPA guidelines: 63.9% boys; 25.1% girls: p<0.001). For boys and girls combined, significant correlates (p<0.05) of MVPA were waist circumference (β-.007), travel mode to school (β.140), maternal employment status (β-.119) and TVs in bedroom (β-.107). In boys, significant correlates of MVPA were waist circumference (β-.011), travel mode to school (β.133) and maternal employment status (β-.195). In girls, the only significant correlate of MVPA was travel mode to school (β.143). CONCLUSIONS: This study provides evidence for a high prevalence of physical inactivity. Several factors were identified as correlates of MVPA in Brazilian children; however, only travel mode to school was common for both boys and girls.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
