Do Adolescents Who Meet Physical Activity Recommendations on Weekdays Also Meet Them on Weekends? A Cross-Sectional Study in Colombia.

The purpose of this study was to examine whether Colombian adolescents fulfill physical activity (PA) recommendations by type of day depending on several variables. A cross-sectional study was carried out on a sample of 2624 adolescents from Neiva (Colombia) using the Seven Day PA Recall and the Family Affluence Scale II self-reported questionnaires. Statistical analyses were performed to find any differences by gender, socioeconomic status, PA recommendations accomplishment, participation in organized and non-organized PA, parents' involvement in sport, and adolescents' academic achievement, and to determine the probability of complying with the PA guidelines. Only 12.3% of the participants met the PA recommendations on weekdays and weekends. Girls maintained their (in)active patterns during the week more than boys (84.4% vs. 70.7%, respectively), while more boys than girls changed them according to the type of day (25.3% vs. 19.6%). Participation in organized sports was the predictor variable with the highest probability of both boys and girls complying with the PA recommendations on weekdays. Non-organized activities were more likely to make girls more active on weekends. In conclusion, a wider offer of organized and non-competitive PA over the weekend and broader sports schedules should be provided to youth in Neiva.

Active Gaming Prevalence and Correlates by Type of Day in Spanish Youth.

BACKGROUND: Active gaming has emerged as a new option to foster physical activity in youth. The aim of this study was to estimate the prevalence of active gaming in adolescents, to determine differences between active and nonactive gamers by type of day, and to examine predictors of being an active gamer. METHODS: A cross-sectional study was conducted with 3095 Spanish adolescents aged 12 to 18 years who self-reported their involvement in moderate to vigorous physical activity, sedentary behaviors, and active gaming. Those engaging in active gaming for at least 10 minutes per day were considered active gamers. Student's 2-tailed t tests, chi-square test, and binomial logistic regression were performed. RESULTS: About 25.9% of the adolescents were active gamers. They were younger, had higher body mass index, and spent more time on moderate to vigorous physical activity, television viewing, and sedentary video games with computer/console than nonactive gamers. There were more active gamers on weekends than on weekdays. On weekdays, more males than females were active gamers. Adolescents who did not meet sleep time guidelines were more likely to be active gamers on weekdays, whereas on weekends, being a girl, overweight/obese, and having a high socioeconomic status were predictors of being an active gamer. CONCLUSION: Because active gaming may contribute to meeting physical activity guidelines, the present findings could enable better targeting of physical activity promotion programs.

Screen time and moderate-to-vigorous physical activity changes and displacement in adolescence: A prospective cohort study.

BACKGROUND: This paper determines longitudinal changes in the time Spanish adolescents devote to moderate-to-vigorous physical activity (MVPA) and screen media activity (SMA). Moreover, it examines the displacement hypothesis between time spent on SMA and MVPA. METHODS: A cohort of 755 adolescents participated in a prospective cohort study over a three-year period. Repeated measures ANOVA to highlight interaction effects among all variables and Structural Equation Modeling (SEM) techniques were employed. RESULTS: Age and gender-related variations in longitudinal changes in time spent on MVPA and SMA evolved in the inverse direction (decreased on MVPA/increased on SMA) according to the ANOVA. The potential displacement between time spent on SMA and MVPA from Wave I to Wave II was analysed via SEM. The first model, estimated in the overall sample, showed no evidence for the displacement hypothesis. Subsequently, a multigroup sequence of panel models was performed and a partial displacement was observed only in boys. Hence, boys who spent more time on SMA were more likely to devote less time to MVPA three years later. CONCLUSION: This study confirms the opposite trend on the time spent on MVPA and SMA over a three-year period, being clearly higher in SMA. Further SEM analyses reveal a deferred displacement hypothesis between SMA and MVPA only in boys. This partial gendered displacement may be linked to the different uses adolescents make of screen media. The incursion of new technological devices (smartphones or tablets) and their wide range of possibilities for social networking or gaming could explain this displacement.

[Validation of a short Spanish version of the instrument Barriers to Physical Activity Questionnaire for People with Mobility Impairments.] / Validación de una versión reducida en español del instrumento Barriers to Physical Activity Questionnaire for People with Mobility Impairments.

OBJECTIVE: To validate a short Spanish version of the instrument Barriers to Physical Activity Questionnaire for People with Mobility Impairments (BPAQ-MI), applicable to different types of disability. MATERIALS AND METHODS: The questionnaire was administered to 791 university students with disabilities. The factorial structure was validated by confirmatory factor analysis and Spearman correlations were carried out to assess criterion validity. Reliability was assessed using Cronbach's alpha coefficient. RESULTS: The proposed model showed good adjustment indexes and an excellent internal consistency (α= 0.920). Negative relationships emerged between the experienced barriers and time spent in physical activity. CONCLUSIONS: The short Spanish version of the BPAQ-MI proves to be a valid and reliable instrument to identify, from a socio-ecological perspective, the barriers to physical activity experienced by students with disabilities. The results provide valuable information to develop programs to promote physical activity in this group.

OBJETIVO: Validar una versión reducida en español del instrumento Barriers to Physical Activity Questionnaire for People with Mobility Impairments (BPAQ-MI), aplicable a diferentes tipos de discapacidad. MATERIAL Y MÉTODOS: El cuestionario fue aplicado a 791 universitarios con discapacidad. La estructura factorial se validó mediante un análisis factorial confirmatorio y, para valorar la validez criterial, se llevaron a cabo correlaciones de Spearman. La fiabilidad se evaluó mediante el coeficiente alfa de Cronbach. RESULTADOS: El modelo propuesto reveló buenos índices de ajuste y una excelente consistencia interna (α=0.920). Surgieron relaciones negativas entre las barreras experimentadas y el tiempo de actividad física. CONCLUSIONES: La versión reducida y en español del BPAQ-MI resulta un instrumento válido y fiable para identificar, desde un enfoque socioecológico, las barreras que los estudiantes con discapacidad experimentan para realizar actividad física. Los resultados aportan información valiosa para desarrollar programas de promoción de la actividad física en este colectivo.

Validación de una versión reducida en español del instrumento Barriers to Physical Activity Questionnaire for People with Mobility Impairments / Validation of a short Spanish versión of the instrument Barriers to Physical Activity Questionnaire for People with Mobility Impairments

Resumen: Objetivo: Validar una versión reducida en español del instrumento Barriers to Physical Activity Questionnaire for People with Mobility Impairments (BPAQ-MI), aplicable a diferentes tipos de discapacidad. Material y métodos: El cuestionario fue aplicado a 791 universitarios con discapacidad. La estructura factorial se validó mediante un análisis factorial confirmatorio y, para valorar la validez criterial, se llevaron a cabo correlaciones de Spearman. La fiabilidad se evaluó mediante el coeficiente alfa de Cronbach. Resultados: El modelo propuesto reveló buenos índices de ajuste y una excelente consistencia interna (α=0.920). Surgieron relaciones negativas entre las barreras experimentadas y el tiempo de actividad física. Conclusiones: La versión reducida y en español del BPAQ-MI resulta un instrumento válido y fiable para identificar, desde un enfoque socioecológico, las barreras que los estudiantes con discapacidad experimentan para realizar actividad física. Los resultados aportan información valiosa para desarrollar programas de promoción de la actividad física en este colectivo.

Abstract: Objective: To validate a short Spanish version of the instrument Barriers to Physical Activity Questionnaire for People with Mobility Impairments (BPAQ-MI), applicable to different types of disability. Materials and methods: The questionnaire was administered to 791 university students with disabilities. The factorial structure was validated by confirmatory factor analysis and Spearman correlations were carried out to assess criterion validity. Reliability was assessed using Cronbach's alpha coefficient. Results: The proposed model showed good adjustment indexes and an excellent internal consistency (α= 0.920). Negative relationships emerged between the experienced barriers and time spent in physical activity. Conclusions: The short Spanish version of the BPAQ-MI proves to be a valid and reliable instrument to identify, from a socio-ecological perspective, the barriers to physical activity experienced by students with disabilities. The results provide valuable information to develop programs to promote physical activity in this group.

Longitudinal changes in physical activity, sedentary behavior and body mass index in adolescence: Migrations towards different weight cluster.

This study examined longitudinal changes in physical activity, sedentary behavior and body mass index in adolescents, specifically their migrations towards a different weight cluster. A cohort of 755 adolescents participated in a three-year study. A clustering Self-Organized Maps Analysis was performed to visualize changes in subjects' characteristics between the first and second assessment, and how adolescents were grouped. Also a classification tree was used to identify the behavioral characteristics of the groups that changed their weight cluster. Results indicated that boys were more active and less sedentary than girls. Boys were especially keen to technological-based activities while girls preferred social-based activities. A moderate competing effect between sedentary behaviors and physical activities was observed, especially in girls. Overweight and obesity were negatively associated with physical activity, although a small group of overweight/obese adolescents showed a positive relationship with vigorous physical activity. Cluster migrations indicated that 22.66% of adolescents changed their weight cluster to a lower category and none of them moved in the opposite direction. The behavioral characteristics of these adolescents did not support the hypothesis that the change to a lower weight cluster was a consequence of an increase in time devoted to physical activity or a decrease in time spent on sedentary behavior. Physical activity and sedentary behavior does not exert a substantial effect on overweight and obesity. Therefore, there are other ways of changing to a lower-weight status in adolescents apart from those in which physical activity and sedentary behavior are involved.

Correction: Does Sedentary Behavior Predict Academic Performance in Adolescents or the Other Way Round? A Longitudinal Path Analysis.

[This corrects the article DOI: 10.1371/journal.pone.0153272.].

Does Sedentary Behavior Predict Academic Performance in Adolescents or the Other Way Round? A Longitudinal Path Analysis.

This study examined whether adolescents' time spent on sedentary behaviors (academic, technological-based and social-based activities) was a better predictor of academic performance than the reverse. A cohort of 755 adolescents participated in a three-year period study. Structural Equation Modeling techniques were used to test plausible causal hypotheses. Four competing models were analyzed to determine which model best fitted the data. The Best Model was separately tested by gender. The Best Model showed that academic performance was a better predictor of sedentary behaviors than the other way round. It also indicated that students who obtained excellent academic results were more likely to succeed academically three years later. Moreover, adolescents who spent more time in the three different types of sedentary behaviors were more likely to engage longer in those sedentary behaviors after the three-year period. The better the adolescents performed academically, the less time they devoted to social-based activities and more to academic activities. An inverse relationship emerged between time dedicated to technological-based activities and academic sedentary activities. A moderating auto-regressive effect by gender indicated that boys were more likely to spend more time on technological-based activities three years later than girls. To conclude, previous academic performance predicts better sedentary behaviors three years later than the reverse. The positive longitudinal auto-regressive effects on the four variables under study reinforce the 'success breeds success' hypothesis, with academic performance and social-based activities emerging as the strongest ones. Technological-based activities showed a moderating effect by gender and a negative longitudinal association with academic activities that supports a displacement hypothesis. Other longitudinal and covariate effects reflect the complex relationships among sedentary behaviors and academic performance and the need to explore these relationships in depth. Theoretical and practical implications for school health are outlined.

Identidad deportiva en adolescentes españoles: propiedades psicométricas de la versión en español de la escala Athletic Identity Measurement Scale-E / Athletic identity in Spanish adolescents: psychometric properties of the Spanish version of the Athletic Identity Measurement Scale-E

Este estudio pretende determinar las propiedades psicométricas de la Athletic Identity Measurement Scale en su versión traducida al español y la identidad deportiva (ID) de una muestra de adolescentes españoles. El cuestionario se administró a 441 adolescentes de 12-18 años, clasificados en: adolescentes del Programa de Especialización Deportiva (PED), adolescentes no-PED activos y adolescentes no-PED inactivos. El análisis factorial confirmatorio reveló una estructura jerárquica y multidimensional de tres factores de primer orden (identidad social, exclusividad y afectividad negativa) y uno de segundo orden, la ID. Los resultados apoyan la adecuación de los ítems en sus respectivas subescalas y una buena consistencia interna tanto global como de los factores de primer orden. Asimismo, la validez convergente y diferencial se determinó con una submuestra mediante análisis multivariado para comprobar los efectos de la participación deportiva, el sexo y la edad sobre la ID. Los chicos muestran una mayor ID, tanto global como en los tres factores particulares, que las chicas, presentando las mayores diferencias en el factor exclusividad. Los niveles de ID disminuyen conforme se pasa del grupo de adolescentes del PED al de adolescentes no-PED inactivos, el factor afectividad negativa es el más relevante en este último grupo. Se concluye que la versión española de la Athletic Identity Measurement Scale constituye un instrumento válido y fiable de medición del constructo multidimensional de la ID y su uso, tanto global como particular, resulta psicométricamente adecuado para aplicar en adolescentes españoles.

The study aimed to determine the psychometric properties of the Athletic Identity Measurement Scale translated into Spanish and the athletic identity (AI) in a sample of Spanish adolescents. The questionnaire was administered to 441 adolescents aged 12 to 18, classified in three groups: Sport Specialization Programme (PED) adolescents, non-PED active adolescents and no-PED inactive adolescents. Results from confirmatory factor analysis revealed a hierarchical and multidimensional structure of three first-order factors named: social identity, exclusivity and negative affectivity; and one second-order factor called AI. The findings support the adequacy of the items in their respective subscales and a good internal consistency of both the global and first-order scales. Convergent and differential validity was determined with a subsample, using multivariate analysis, to test the effects of sport participation, sex and age on adolescents' AI. Results indicated that male adolescents showed a higher level of AI -both globally and in the three particular factors- than female adolescents, revealing greater differences in the exclusivity factor. The AI levels decrease progressing from PED adolescents group to the group of non-PED inactive adolescents, the negative affectivity being the most relevant factor in the last group. We can conclude the Spanish version of the Athletic Identity Measurement Scale is a valid and reliable instrument to measure the multidimensional construct of AI, and its global and particular use is psychometrically appropriate for application in Spanish adolescents.

Competing Effects Between Screen Media Time and Physical Activity in Adolescent Girls: Clustering a Self-Organizing Maps Analysis.

BACKGROUND: Previous research shows contradictory findings on potential competing effects between sedentary screen media usage (SMU) and physical activity (PA). This study examined these effects on adolescent girls via self-organizing maps analysis focusing on 3 target profiles. METHODS: A sample of 1,516 girls aged 12 to 18 years self-reported daily time engagement in PA (moderate and vigorous intensity) and in screen media activities (TV/video/DVD, computer, and videogames), separately and combined. RESULTS: Topological interrelationships from the 13 emerging maps indicated a moderate competing effect between physically active and sedentary SMU patterns. Higher SES and overweight status were linked to either active or inactive behaviors. Three target clusters were explored in more detail. Cluster 1, named temperate-media actives, showed capabilities of being active while engaging in a moderate level of SMU (TV/video/DVD mainly). In Cluster 2, named prudent-media inactives, and Cluster 3, compulsive-media inactives, a competing effect between SMU and PA emerged, being sedentary SMU behaviors responsible for a low involvement in active pursuits. CONCLUSION: SMU and PA emerge as both related and independent behaviors in girls, resulting in a moderate competing effect. Findings support the case for recommending the timing of PA and SMU for recreational purposes considering different profiles, sociodemographic factors and types of SMU.

Variabilidad de la actividad física en adolescentes españoles de 17-18 años en función del tipo de jornada y época del año / Vabiability of physical activity in 17-18 year-old spanish adolescents by type of day and season

The aim of this study was to analyze the variability of physical activity levels, according to the season (winter, autumn) and type of day (weekend, school day), in a sample of 395 Spanish adolescents aged 17-18 years old. Physical activity was measured with the Four by one-day physical activity questionnaire. Adolescents showed more energy expenditure in winter (M = 39.97 Kcal/kg/day) than in autumn (M = 37.31 Kcal/kg/day), and during the weekend (M = 39.29 Kcal/kg/day) than the school day (M = 37.99 Kcal/kg/day). Chi-square tests showed that more teens were 'active' and 'moderately active' in these periods in which there were also more energy expenditure. Nevertheless, in autumn adolescents showed more energy expenditure during the school day (M = 38.56 Kcal/kg/day) than the weekend (M = 36.06 Kcal/kg/day), while the opposite happened in winter (M = 42.52 Kcal/kg/day during weekend and M = 37.41 Kcal/kg/day during school day). Results from this study indicate season and type of day may influence adolescents’ physical activity levels, but differently compared to other countries or geographical areas. According to this specific variability, several strategies for the promotion of physical activity in the most inactive periods of the week and the year are suggested (AU)

El objetivo de este estudio fue analizar la variabilidad de los niveles de actividad física de una muestra de 395 adolescentes españoles de 17-18 años, según la estación del año (otoño, invierno) y el tipo de jornada (entre semana, fin de semana). La medida de la actividad física se llevó a cabo a través del cuestionario de recuerdo Four by one-day physical activity questionnaire. Los adolescentes presentaron mayor gasto energético en invierno (M = 39.97 Kcal/kg/día) que en otoño (M = 37.31 Kcal/kg/día), y en fin de semana (M = 39.29 Kcal/kg/día) que en jornada escolar (M = 37.99 Kcal/kg/día). Las pruebas Chi-cuadrado muestran que hay más adolescentes ‘activos’ y ‘moderadamente activos’ en estos periodos en los que también hay mayor gasto energético. No obstante, en otoño los jóvenes presentaron mayor gasto energético durante la jornada escolar (M = 38.56 Kcal/kg/día) que en fin de semana (M = 36.06 Kcal/kg/día), mientras que en invierno ocurrió lo contrario (M = 42.52 Kcal/kg/día en fin de semana y M = 37.41 Kcal/kg/día durante la jornada escolar). Los resultados de este estudio indican que la estación del año y el tipo de jornada pueden afectar a los niveles de actividad física de los adolescentes, pero de modo distinto en comparación con otros países o zonas geográficas. En función de esta variabilidad particular, se plantean diversas estrategias para la promoción de la actividad física en los periodos más inactivos de la semana y el año (AU)

Screen media usage, sleep time and academic performance in adolescents: clustering a self-organizing maps analysis.

Screen media usage, sleep time and socio-demographic features are related to adolescents' academic performance, but interrelations are little explored. This paper describes these interrelations and behavioral profiles clustered in low and high academic performance. A nationally representative sample of 3,095 Spanish adolescents, aged 12 to 18, was surveyed on 15 variables linked to the purpose of the study. A Self-Organizing Maps analysis established non-linear interrelationships among these variables and identified behavior patterns in subsequent cluster analyses. Topological interrelationships established from the 15 emerging maps indicated that boys used more passive videogames and computers for playing than girls, who tended to use mobile phones to communicate with others. Adolescents with the highest academic performance were the youngest. They slept more and spent less time using sedentary screen media when compared to those with the lowest performance, and they also showed topological relationships with higher socioeconomic status adolescents. Cluster 1 grouped boys who spent more than 5.5 hours daily using sedentary screen media. Their academic performance was low and they slept an average of 8 hours daily. Cluster 2 gathered girls with an excellent academic performance, who slept nearly 9 hours per day, and devoted less time daily to sedentary screen media. Academic performance was directly related to sleep time and socioeconomic status, but inversely related to overall sedentary screen media usage. Profiles from the two clusters were strongly differentiated by gender, age, sedentary screen media usage, sleep time and academic achievement. Girls with the highest academic results had a medium socioeconomic status in Cluster 2. Findings may contribute to establishing recommendations about the timing and duration of screen media usage in adolescents and appropriate sleep time needed to successfully meet the demands of school academics and to improve interventions targeting to affect behavioral change.

Brief report: Association between socio-demographic factors, screen media usage and physical activity by type of day in Spanish adolescents.

This study examined the relationship between socio-demographic factors, screen media time usage, and light, moderate and vigorous activities on weekdays and weekends. Cross-sectional data was collected from 323 Spanish adolescents (mean age 13.59 years) who completed an interview administered recall questionnaire. Structural equation models indicated that male and younger adolescents spent more time on vigorous activities at the weekend, while females and older adolescents showed a greater involvement in light activities both on weekdays and weekends. State school students reported engaging in light and vigorous activities for longer periods than private school students on weekends. TV viewing was negatively linked to vigorous activities during weekdays and to light and moderate activities on weekends. The amount of mobile phone usage, however, was positively linked to light activities during weekdays, but negatively on weekends. The negative relationship between adolescents' use of screen media (TV and mobile phone) and physical activity and its possible displacement, depending on the type of day, added useful comparable knowledge for policies promoting an active lifestyle. Further research is required to provide evidence of the causality in the observed relationships.

Screen media time usage of 12-16 year-old Spanish school adolescents: Effects of personal and socioeconomic factors, season and type of day.

This study examined screen media time usage (SMTU) and its association with personal and socioeconomic factors, as well as the effect of season and type of day, in a Spanish sample of 12-16 year-old school adolescents (N=323). The research design was a cross-sectional survey, in which an interviewer-administered recall questionnaire was used. Statistical analyses included repeated measures analyses of variance, analysis of covariance and structural equation models. Results showed an average of 2.52h per day of total SMTU and partial times of 1.73h per day in TV viewing, 0.27h per day in computer/videogames, and 0.52h per day in mobile use. Four significant predictors of SMTU emerged. Firstly, the type of school was associated with the three media of our study, particularly students from state/public school spent more time on them than their private schools counterparts. Secondly, older adolescents (14-16 years old) were more likely to use computer/videogame and mobile phone than younger adolescents. Thirdly, the more accessibility to household technology the more probable computer/videogames and mobile phone were used. Finally, boys spent significantly more time in mobile phone than girls. Additionally, results revealed that adolescents seemed to consume more TV and computer/videogames in autumn than in winter, and more TV and mobile phones on weekends than on weekdays, especially among state school students. Findings from this study contribute to the existing knowledge on adolescents' SMTU patterns that can be transferred to families and policies.