A5074854618- Obesity, Physical Activity, Diet
- Physical Activity and Health
- Behavioral Health and Interventions
- Impact of Technology on Adolescents
- Birth, Development, and Health
- Gestational Diabetes Research and Management
- Child Development and Digital Technology
- Eating Disorders and Behaviors
- Heart Rate Variability and Autonomic Control
- Health and Lifestyle Studies
- Children's Physical and Motor Development
- Sleep and related disorders
- Mobile Health and mHealth Applications
- Digital Mental Health Interventions
- FOXO transcription factor regulation
- Interprofessional Education and Collaboration
- Attention Deficit Hyperactivity Disorder
- Nutritional Studies and Diet
- Infant Development and Preterm Care
- Healthcare Systems and Public Health
- Cardiovascular Disease and Adiposity
- Nursing Roles and Practices
- Health and Wellbeing Research
- Liver Disease Diagnosis and Treatment
- Social Media and Politics
National Cancer Institute
2023-2025
National Institutes of Health
2023-2025
National Institute on Drug Abuse
2025
Government of the United States of America
2024
University of Southern California
2017-2022
University of California, Los Angeles
2020
Children's Hospital of Los Angeles
2020
North Shore University Hospital
2000
Abstract Background Youth use different forms of screen time (e.g., streaming, gaming) that may be related to body mass index (BMI). Screen is non-independent from other behaviors, including physical activity and sleep duration. Statistical approaches such as isotemporal substitution or compositional data analysis (CoDA) can model associations between these behaviors health outcomes. Few studies have examined types time, activity, duration simultaneously in relation BMI. Methods Data were...
Screen-based sedentary behaviors and emotional disorders are associated with one another in youth. Yet, the direction of association is unclear, as whether specific types screen-based disorder symptoms more closely linked. This study estimated bi-directional associations between two four self-reported symptoms, tested physical activity buffered these a Los Angeles high school student cohort (
In 2011, the National Collaborative on Childhood Obesity Research established a Measures Registry (updated in 2020) for four key variables associated with childhood obesity. We analyzed individual physical activity behaviors portion of to highlight strengths and gaps reliability validity literature children's adolescents' measures. There were 455 Measurement entries included present analysis. Overall, 212 assessed reliability, most commonly test–retest (70%) or internal consistency (18%),...
ABSTRACT Purpose The objective of this study was to quantify age-related changes in accelerometer-derived day-level physical activity and sedentary behavior pattern metrics (i.e., number, length, temporal dispersion bouts breaks) across 3 yr middle childhood. Differences by child sex weekend versus weekday were examined. Method Children ( N = 169, 54% female, 56% Hispanic; 8–12 old at enrollment) participated a longitudinal with six assessments yr. Day-level moderate-to-vigorous (MVPA; i.e.,...
Background: To address the limitations of retrospective self-reports activity, such as its susceptibility to recall bias, researchers have shifted toward collecting real-time activity data on mobile devices via ecological momentary assessment (EMA). Although EMA is becoming increasingly common, it not known how physical and sedentary behaviors relate objective measures or whether there are factors that may influence strength association between these two measures. Understanding relationship...
U.S. adolescent suicidal behavior and digital media use prevalence have contemporaneously increased this decade in population-level ecological analyses. The purpose of study was to determine whether these two trends are directly associated by using multi-year person-level data test the association year with mediated use. Data were from Youth Risk Behavior Surveillance System (2009-2017), a nationally-representative biennial cross-sectional self-report survey students (N = 72,942). Mediation...
This study investigated the cross-sectional and longitudinal associations of substitution non-school time light physical activity (LPA), moderate-to-vigorous (MVPA), sedentary (ST) with adiposity in boys girls. Boys (
Abstract Objective We examined the within-person longitudinal and bidirectional associations between patterns of sedentary time accumulation [alpha (sedentary bout duration/length), breaks (number in bouts)], symptoms major depressive disorder generalized anxiety disorder. Methods Children [N = 167, 10.1(0.9) years old, 54.5% female, 59.3% Hispanic, 35.9% overweight/obese at baseline] participated a 3-year study that consisted assessments time, symptoms. At each assessment, participants wore...
Abstract Background The bi-directional associations between affective states and movement behaviors (e.g., physical activity, sedentary behavior) have been observed in children. It is unclear if the strength of these varies with age as children transition from childhood to adolescence. Purpose This multi-wave ecological momentary assessment (EMA) study investigates acute time-varying affect among youth. Methods Children (N = 195, baseline mean 10.72, range 8–12 years, BMI-z 0.49, 51% female)...
Time spent on screens and adiposity change rapidly from childhood to adolescence, with differences by gender race/ethnicity.Apply time-varying effect models (TVEMs) a nationally representative sample of youth identify the age ranges when cross-sectional associations between television viewing, computer use, are significant.Data 8 15-year-olds (n = 3593) National Health Nutrition Examination Survey (2011-2018) were extracted. TVEMs estimated fat mass index as dynamic functions participants'...
Most children in the United States currently do not meet physical activity (PA) guidelines, and perceived stress is a known barrier against PA. However, most studies have solely focused on between-subject (BS) association of PA, whereas within-subject (WS) relationship remains under-studied children. This limits our understanding day-level psychosocial factors that influence children's PA engagement. study assessed same-day associations Morning Cortisol after Awakening (MCA) morning with...
Purpose : Sedentary time relates to higher anxiety and more negative affect in children. This study assessed whether interrupting sitting over 3 hours is sufficient influence state anxiety, positive affect, or tested weight status as a moderator. Methods Analyses were the second (preplanned) purpose of larger study. Children (N = 61; age: mean [SD] 9.5 [1.3]; 43% healthy weight) completed 2 experimental conditions: continuous for interrupted with walking minutes every 30 minutes. State...
Abstract Context Prenatal exposures and lifestyle factors are important for metabolic health. Objective Determine how prenatal to maternal obesity and/or gestational diabetes mellitus (GDM) childhood independently contribute child insulin sensitivity. Design Participants Ninety children aged 7 11 years (56% girls, 60% exposed GDM), born at Kaiser-Permanente Southern California, completed an oral glucose tolerance test (OGTT) as part of the BrainChild Study. Matsuda sensitivity index (ISI)...
Background: Less moderate to vigorous physical activity (MVPA), more sedentary time (ST), and higher perceived stress are related type 2 diabetes mellitus (T2DM) occurrence, but observational evidence addressing the interaction of these factors is lacking in youth. This pilot study investigated momentary as a moderator acute associations MVPA ST with subsequent glucose healthy adolescents. Methods: Participants (N=15, Mage=13.1±1.0 years, 10 girls, 5 overweight/obesity) simultaneously wore...