1,993 publications from this institution
Boys are typically more physically active than girls, but schools have the potential to promote health-related physical activity for all children. This study investigated gender differences in children’s physical activity levels during physical education (PE) classes and unstructured recess periods. The activity levels of 91 fifth-grade children were assessed by accelerometer (Caltrac) on 3 days. Results indicated that children’s activity levels were low to moderately stable from day to day in both environments. Boys and girls had similar activity levels during PE, t (89) = 1.49, p = .140, but boys were significantly more active than girls during recess, t (89) = 3.27, p = .002. Girls were significantly more active during PE than they were at recess, t (51) = 2.08, p = .043. The results suggest that structured PE classes may provide similar amounts of physical activity for both genders.
To examine the relationship between habitual physical activity and components of health-related physical fitness in children.Cross-sectional survey with correlational analysis.Seven public elementary schools in a suburban southern California city.Five hundred twenty-eight healthy fourth-grade children (274 boys and 254 girls), 85% of whom were non-Hispanic whites. Ninety-eight percent of eligible students participated.None.Results of six measures of physical activity in children (monitoring by accelerometer, parent report, and child self-reports of weekday activity, weekend activity, and summer involvement in activity classes and youth sports) were combined in a physical activity index. This index of habitual physical activity was examined in relation to measures of five components of health-related fitness: the mile run, skin-fold tests, pull-ups, sit-ups, and the sit-and-reach test. The physical activity index was significantly associated with all five fitness components. The canonical correlation was .29.Active children appear to engage in a sufficient variety of activities to enhance multiple components of health-related fitness.
Objective Quantify moderate-to-vigorous physical activity (MVPA) and its correlates in preschool children during outdoor unstructured play periods using direct observation. Methods Cross-sectional data consisting of 204 observation periods collected from 51 four- and five-year-old children using the Observation System for Recording Physical Activity in Children — Preschool (OSRAC-P) at a preschool in southern California, autumn and spring 2009–2010. Gender and BMI classification and OSRAC-P environmental codes were related to observed MVPA in multiple logistic regression models. Results Less than 21% of intervals were spent in MVPA overall. Boys and normal weight children engaged in higher intensity levels than their respective counterparts. More MVPA was associated with normal weight (OR =2.49–3.25, R 2 =3%), location (grass, playground, looping cycle path; OR =3.21–4.90, R 2 =4–12%), play context (ball/objects, wheel, open space; OR =2.78–8.51, R 2 =9%), and group composition (solitary, one-on-one; OR =1.34–2.08, R 2 =1%). Conclusion Open spaces located in playgrounds and grass fields, and activity-genic portable equipment, manipulative objects, and riding vehicles are some design and equipment features that appear to foster MVPA. Lowering play space density and engaging children through teacher prompts and teacher-arranged activities may further increase MVPA on playgrounds.
There is growing interest in the relation of built environments to physical activity, obesity, and other health outcomes. The purpose of the present study was to test associations of neighborhood built environment and median income to multiple health outcomes and examine whether associations are similar for low- and high-income groups. This was a cross-sectional study of 32 neighborhoods in Seattle, WA and Baltimore, MD regions, stratified by income and walkability, and conducted between 2001 and 2005. Participants were adults aged 20–65years (n =2199; 26% ethnic minority). The main outcomes were daily minutes of moderate-to-vigorous physical activity (MVPA) from accelerometer monitoring, body mass index (BMI) based on self-report, and mental and physical quality of life (QoL) assessed with the SF-12. We found that MVPA was higher in high- vs. low-walkability neighborhoods but did not differ by neighborhood income. Overweight/obesity (BMI ≥25) was lower in high-walkability neighborhoods. Physical QoL was higher in high-income neighborhoods but unrelated to walkability. Adjustment for neighborhood self-selection produced minor changes. We concluded that living in walkable neighborhoods was associated with more physical activity and lower overweight/obesity but not with other benefits. Lower- and higher-income groups benefited similarly from living in high-walkability neighborhoods. Adults in higher-income neighborhoods had lower BMI and higher physical QoL.
Objectives To investigate whether active school transport was associated with fast food consumption, and to examine differences across racial/ethnic groups. Methods Adolescent data (n =3194) from the 2009 California Health Interview Survey were analyzed with logistic regression models to examine the association between active school transport (AST) and fast food intake across racial/ethnic groups. Results In the overall sample, AST during 1–2days in the past week was associated with greater likelihood of fast food intake (OR: 1.58; 95% CI: 1.03–2.43), compared with zero days of AST, controlling for demographic and other factors. The association between AST and fast food intake differed significantly by race/ethnicity (p <0.01). Among Latino adolescents, greater frequency of AST was significantly associated with greater likelihood of fast food intake (1–2days OR, 2.37, 95%CI: 1.05–5.35; 3–4days OR, 2.78, 95% CI: 1.04–7.43; 5days OR, 2.20, 95%CI: 1.23–3.93). Among White and Asian adolescents, there was a curvilinear pattern: relative to adolescents who reported zero days of AST, those who did AST 1–2days/week had greater likelihood of fast food intake, but AST of 3–4days and 5days/week was associated respectively, with higher and lower likelihood of fast food intake among both groups. Conclusions AST appears to be a risk factor for fast food intake, and may expose some ethnic groups more than others to increased opportunity to purchase and consume fast food. Programs and policies to promote AST among adolescents should incorporate efforts to encourage healthy eating and discourage concentration of fast food outlets near schools.
There is controversy about the role of pediatric care givers in reducing presumed risk factors for cardiovascular diseases in children. A national mail survey of 2,000 pediatricians was designed to determine the attitudes, current practices, and knowledge among primary care pediatricians regarding these risks. The response rate was 60% (779 primary care pediatricians). Responses indicated that a majority of pediatricians take a family history of cardiovascular diseases, assess BP, recommend exercise to school-aged children, and advise patients and parents against smoking. Few pediatricians felt confident in their ability to affect change in patient life-styles. There was a relatively low level of provision of dietary advice, and most pediatricians do not measure serum cholesterol levels, except in high-risk older children. A substantial minority do not discuss smoking, even with adolescents. Practices and attitudes varied with the age of the patient. Obesity was the topic most frequently chosen for continuing medical education. Older pediatricians were most likely to advocate and practice risk reduction in children. Attitudes and reported practices also varied by gender and geographic location of the pediatrician as well as the ethnic composition of the practice. Implications for continuing medical education are discussed.
To determine correlates of sedentary behaviors in adolescents through the examination of psychosocial and environmental variables.The study used a cross-sectional design to evaluate an ethnically diverse clinic-based sample of 878 adolescents who were 11 to 15 years old. Bivariate and multivariate analyses were stratified by gender to assess correlates of sedentary behaviors occurring on the most recent nonschool day (television viewing, computer video games, sitting listening to music, and talking on the phone).For girls, age, family support, television/video rules, and hills in the neighborhood were associated with sedentary behaviors. Furthermore, psychological constructs such as self-efficacy, enjoyment, change strategies, and pros and cons of change emerged as correlates of sedentary behaviors. A moderator effect revealed that the proportion of girls in the low-BMI group decreased with increased self-efficacy, whereas the proportion of girls in the high-BMI group did not vary significantly by self-efficacy. For boys, age, ethnicity, BMI, cons of change, and self-efficacy were associated with sedentary behaviors.This study provides evidence of factors associated and not associated with adolescent sedentary behaviors. Similar to physical activity, measures of specific psychosocial constructs of sedentary behavior demonstrated important associations. The results highlight the need for additional examination of the correlates of sedentary behavior to determine which correlates are mechanisms of behavior change.
