Sedentary behavior moderates the relationship between physical activity and cardiometabolic risk in young Latino children.

This study investigated the role of objectively measured moderate-vigorous physical activity (MVPA) and sedentary behavior on cardiometabolic risk factors of young Latino children. We hypothesized that MVPA would be associated with lower cardiometabolic risk when sedentary behavior is low. We studied 86 primarily low-income, Latino children using a cross-sectional study design. The study sample consisted of 51 girls and 35 boys, with mean age 5.6 (SD = .53) years. Physical activity was measured by accelerometry, anthropometric measures obtained, and fasting blood samples were used to measure cardiometabolic risk factors. Greater levels of sedentary behavior were associated with increased waist circumference (rs = .24, p < .05) and metabolic risks. MVPA, however, had significant beneficial associations with all cardiometabolic risk factors (rs-range = -.20 to -.45, p < .05) with the exception of plasma insulin. MVPA predicted latent variables representing anthropometric risk (ß = -.57, p < .01), cardiac risk (ß = -.74, p < .01), and metabolic risk (ß = -.88, p < .01). Sedentary behavior significantly moderated the effect of MVPA on anthropometric (ß-interaction = .49, p < .01), cardiac (ß-interaction = .45, p < .01), and metabolic risk (ß-interaction = .77, p < .01), such that more MVPA was associated with better health outcomes under conditions of lower sedentary behavior. The model explained 13%, 22%, and 45% variance in anthropometric, cardiac, and metabolic risk factors, respectively. Increased MVPA is associated with decreased cardiometabolic risk in young Latino children, particularly when sedentary behavior is low.

This study investigated the role of objectively measured moderate­vigorous physical activity (MVPA) and sedentary behavior on cardiometabolic risk factors of young Latino children. We hypothesized that MVPA would be associated with lower cardiometabolic risk when sedentary behavior is low. The study sample consisted of 51 girls and 35 boys, with mean age 5.6 (SD = .53) years. Participants were primarily low-income, Latino children. We found that greater levels of sedentary behavior were associated with increased waist circumference and metabolic risks. MVPA, however, had significant beneficial associations with all cardiometabolic risk factors with the exception of insulin. MVPA predicted latent variables representing anthropometric risk, cardiac risk, and metabolic risk. Sedentary behavior significantly moderated the effect of MVPA on anthropometric, cardiac, and metabolic risk, such that more MVPA was associated with better health outcomes under conditions of lower sedentary behavior. We conclude that an increased MVPA is associated with decreased cardiometabolic risk in young Latino children, particularly when sedentary behavior is low.

Objectively Measured Sedentary Behavior, Physical Activity, and Cardiometabolic Risk in Hispanic Youth: Hispanic Community Health Study/Study of Latino Youth.

Context: Time spent in moderate-to-vigorous physical activity (MVPA), but not in sedentary behavior (SB), is related to cardiometabolic risk among non-Hispanic white youth. Objective: Examine associations of SB and MVPA with cardiometabolic risk factors among Hispanic/Latino youth. Design: Cross-sectional analysis. Setting: Four US communities. Participants: Hispanic/Latino youth (N = 1,426) ages 8 to 16 years. Measurements: Associations of MVPA and SB, measured using 7-day accelerometer data (independent variables), with markers of glucose and lipid metabolism, inflammation, and endothelial function (dependent variables), were assessed in multivariable linear regression models while adjusting for sociodemographic characteristics and accelerometer wear time. Additional models controlled for obesity measures. Results: SB comprised a mean (SD) of 75% (13%) of accelerometer wear time; mean (SD) time of MVPA was 35 min/d (22 min/d). Deleterious levels of high-density lipoprotein-cholesterol (HDL-C), triglycerides, insulin resistance, C-reactive protein, and plasminogen activator inhibitor-1 were associated with lower levels of MVPA and higher levels of SB (all P < 0.05). Associations of MVPA with log-transformed triglyceride concentrations (ß per 15-min/d increment, -0.039; SE, 0.018; P = 0.037) and SB with HDL-C (ß per 30-min/d increment, -0.63; SE, 0.26; P = 0.018), but not those with other markers, remained significant after adjusting for MVPA or SB and further adjustment for body mass index and waist circumference. Higher SB tertiles were associated with lower soluble receptor for advanced glycation end products in fully adjusted models (P for trend = 0.037). Conclusions: Physiological precursors of diabetes and cardiovascular disease were associated with MVPA and SB among US Hispanic/Latino youth, a group that bears a disproportionate burden of metabolic disorders.

Intrinsic Motivation in Ethnic Minority Youth with Type 1 Diabetes.

Increasing intrinsic motivation (IM) may be an effective way to improve regimen adherence and glycemic control in youth with type 1 diabetes (T1D). This preliminary study evaluated the reliability and validity of a new measure of intrinsic motivation for diabetes management for ethnic minority youth with T1D. The 12-item Intrinsic Motivation Inventory for Diabetes Management (IMI-DM) was developed to assess perceptions of confidence in and the importance of engaging in self-care behaviors for diabetes management. Participants included 51 11-16 year-old minority adolescents (M age = 13.5 years) with T1D and their parents. The IMI-DM demonstrated excellent internal consistency (α=.92). Higher IM was associated with better diabetes self-management behaviors and glycemic control, better youth self-concept, less depression and family conflict, and greater youth responsibilities for diabetes management. These findings provide preliminary support for the reliability and validity of a new diabetes-specific IM measure for youth with T1D, and identified some key individual and family factors that may be important to consider in interventions to improve regimen adherence and glycemic control in minority youth with T1D.

Access to and Interest in Using Smartphone Technology for the Management of Type 1 Diabetes in Ethnic Minority Adolescents and Their Parents.

BACKGROUND: A better understanding of parent and adolescent interest in using smartphone technology for type 1 diabetes (T1D) management is needed prior to developing technology-based interventions for ethnic minorities. This study examined access to and interest in technology-based programs for T1D in primarily Hispanic adolescents and their parents. SUBJECTS AND METHODS: During a scheduled clinic visit, adolescents with T1D (n = 50; 52% female; 13.6 ± 2.0 years old; 74% Hispanic; hemoglobin A1c = 8.9 ± 1.7%) and their parents (n = 49; 54% household income <$49,000) completed brief self-report surveys. RESULTS: Adolescents reported having access to the Internet (98%) and their own smartphones (86%). Thirty-seven percent reported using smartphone applications (apps) for their diabetes care, with 88% reporting carbohydrate counting as its primary function. Although most participants reported high/moderate interest in diabetes-specific apps, girls were more likely than boys to endorse high interest in apps to calculate and track insulin doses. A greater proportion of parents than of adolescents expressed high interest in apps to track glucose, count carbohydrates, calculate insulin doses, track insulin use, and receive diabetes-related reminders. A greater proportion of parents than of adolescents also endorsed interest in a program that combined Internet use with smartphone apps. CONCLUSIONS: Results suggest ethnic minority adolescents with T1D across a range of income levels have access to smartphones. Although most parents expressed high interest in diabetes-specific apps, there was greater variability in adolescent interest. Understanding barriers and facilitators to the use of smartphone apps for diabetes care in ethnic minority adolescents may increase their interest in and ultimate adoption of this technology.