Abstract
PurposeWe investigated the stability, correlations and bidirectional relationship of light physical activities (PA), moderate and vigorous PA (MVPA), television viewing (TV) and video game/computer use (VG) in Brazilian adolescents.MethodsAdolescent Nutritional Assessment Longitudinal Study-ELANA is a middle school cohort study conducted in Rio de Janeiro-Brazil in 2010–2012. Self-reported data on PA (International Physical Activity Questionnaire- IPAQ) and screen activities were obtained from 810 adolescents (mean ages of 10.9 years old (SD 0.78) for girls; 11 years old (SD 0.85) for boys) to perform autoregressive cross-lagged structural equation models in two time points for PA and three time points for screen activities.ResultsThere was no significant stability of light PA and MVPA for boys and girls. Moderate stability of screen activities were found for both genders, with a significant coefficient of TV for boys (T1-T2:0.29; T2-T3:0.27 p<0.001); and VG for boys (T1-T2:0.33; T2-T3:0.35 p<0.001) and girls (T1-T2: 0.26; T2-T3:0.37 p<0.01). Significant lagged effects were obtained only among girls: light PA had effect on VG (-0.10 p<0.01), as well as in the opposite direction of TV on light PA (-0.03 p<0.01) and TV on MVPA (-0.11 p<0.01).ConclusionThe light PA, MVPA and screen activities (among girls) did not demonstrate stability over time. A warning scenario was suggested by the stability of high amounts of screen activities among boys over time. Screen activities had bidirectional association with light PA and MVPA among girls over time.
Highlights
Physical inactivity is as a global pandemic that causes morbidity, mortality [1] and substantial economic burden [2]
In model B, lagged television viewing (TV) was negatively associated with moderate and vigorous PA (MVPA) (-0.11, p < 0.01), meaning that more time spent on TV at T1 was associated with less with MVPA at T2 among girls (Fig 3)
Our results demonstrated a significant increase of video game/ computer use (VG) use and decrease of MVPA over time
Summary
Physical inactivity is as a global pandemic that causes morbidity, mortality [1] and substantial economic burden [2]. Only one-fifth of youths are estimated to be sufficiently physically active, whereas sedentary behaviours are even more predominant on the daily time of children and adolescents [3, 4]. The health benefits of physical activity (PA) in higher levels of intensity (moderate and vigorous PA [MVPA]) are well-established in the literature [5]. High levels of sedentary behaviours have been associated with obesity and metabolic risk factors in children and adolescents [9,10,11], and to early mortality in adulthood [12]. PA seems to be less stable in early childhood and in transition phases (e.g. from childhood to adolescence, and from adolescence to adulthood) [14, 15]. Sedentary behaviours such as screen activities, which have a strong habitual element among adolescents, are likely to be relatively stable over time [14, 17]
Sign-in/Register to view highlights & summary 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.
