Longitudinal associations between biopsychosocial stress indicators and sleep in older Puerto Rican adults.

OBJECTIVES: To examine the association of biopsychosocial stress indicators (perceived stress, perceived discrimination, stressful life events, and allostatic load) with sleep outcomes (sleep duration and insomnia symptoms) and to examine sex and age interactions for associations between stress and sleep in older Puerto Rican adults. METHODS: Secondary analyses were performed with 830 participants (72% female) from wave 2 (2006-2011) of the Boston Puerto Rican Health Study (BPRHS), a prospective population-based cohort study (45-75years at baseline) and Boston Puerto Rican Osteoporosis Study (BPROS) (2007-2012), an ancillary study of the BPRHS. Recruitment occurred in randomly selected census blocks using door-to-door and community-based activities. In-home data collection visits included a baseline assessment and follow-up interviews. Questionnaires assessed perceived stress, discrimination, stressful life events, and sleep. Allostatic load indicators were measured objectively. Regression models controlled for sociodemographic, behavioral, and health factors, with interaction analyses, followed by sex- and sex-by-age-stratified analyses. RESULTS: In the prior 2years, participants with chronic stress had 50% greater odds of reporting nonoptimal sleep duration (<7 or >9 hours). Life events trajectories were significantly related to insomnia symptoms. Men ≥65years who experienced chronic stress had greater insomnia symptoms than women, or than men with low stress or acute stress. CONCLUSIONS: Stressful life events may affect sleep duration and insomnia symptoms among older Puerto Rican adults, particularly men 65 years and older who experienced chronic stress. Given the differences in sleep patterns experienced by older adults and their relationships with health outcomes, identifying methods to support sleep health among those with chronic stress is important.

Influence of Home Language Use on the Association Between Parent Education and Child Adiposity in Latino Families.

BACKGROUND: Parent education and language use are associated with child obesity, but the impact of their interaction is less known. This study assessed whether parent education was associated with child adiposity and if this association was moderated by home language use in Latino families. METHODS: Participants (n = 415) were Latino families from the Long Beach area. Demographic data were obtained by self-report parent surveys, and children's body size was objectively assessed via bioelectric impedance. Independent t-tests and hierarchical linear regressions were performed on baseline data from a larger intervention study. RESULTS: In the overall sample, parent education and child body mass index (BMI) percentile were not related (p = .050). However, stratification by home language use revealed that parent education was inversely associated with child BMI percentile among those whose primary home language was Spanish (p = .049), but not English/bilingual homes (p = .296). There were no significant associations with child percent body fat. CONCLUSION: Higher education was associated with a lower BMI percentile only in Spanish-speaking homes. Research to understand how home language influences this relationship is warranted, particularly as it relates to a subset of education and health literacy. Significant results with BMI percentile but not percent body fat highlight the fact that these distinct markers of obesity are not interchangeable.

Longitudinal Associations Between Sleep and Cognitive Function in a Cohort of Older Puerto Rican Adults: Sex and Age Interactions.

BACKGROUND: Evidence on sleep duration or quality and cognitive function in diverse older adults is limited. We examined prospective associations between subjective sleep measures and cognitive function, with modifying effects of sex and age (<65 vs ≥65 years). METHODS: Data are from the longitudinal Boston Puerto Rican Health Study, Waves 2 (n = 943) and 4 (n = 444), with mean follow-up of 10.5 years (range 7.2-12.8). Subjective measures of sleep duration (short <7, ref. 7, or long ≥8 hours) and insomnia symptoms (sum of difficulty falling asleep, waking up at night, and early morning awakening), were assessed at Wave 2. Linear regression models were used to assess changes in global cognition, executive function, memory, and Mini-Mental State Examination, and tested for modifying roles of sex and age. RESULTS: Significant 3-way interaction (sex × age × cognition) in fully adjusted models showed greater decline in global cognitive function in older men with short (ß [95% confidence interval]: -0.67 [-1.24, -0.10]) or long sleep duration (-0.92 [-1.55, -0.30]), compared to women, younger men, and older men with 7 hours of sleep. Insomnia symptoms were associated with a greater decline in memory (-0.54, [-0.85, -0.22]) among older men, compared to women and younger men. CONCLUSION: Sleep duration showed a U-shaped association with cognitive decline, and insomnia symptoms were associated with memory decline in fully adjusted models. Older men, versus women and younger men, were at relatively greater risk for cognitive decline associated with sleep factors. These findings are important for personalizing sleep interventions to support cognitive health.

Associations Between Sleep and Metabolic Outcomes in Preadolescent Children.

Context: Growing evidence suggests an important role for sleep for the metabolic health of children. Objective: We aimed to determine how sleep is related to insulin sensitivity, insulin secretion, beta-cell function, and adiposity (BMI z-scores, body fat %, waist to height ratio) using objectively measured sleep and oral glucose tolerance test (OGTT)-derived measures. Methods: Sixty-two children aged 7-11 years, born at Kaiser Permanente Southern California, wore wrist accelerometers for 7 days to objectively measure sleep, completed an OGTT, and had anthropometric measures (height [cm], weight [kg], waist [cm], body fat [%]) collected. Using linear regression, associations between Matsuda insulin sensitivity index (ISI), insulinogenic index (IGI), disposition index (DI), BMI z-score, waist to height ratio, and body fat % with sleep parameters [total sleep time (TST; min), sleep efficiency (SE; %), time in bed (TIB; min), wake after sleep onset (WASO; min), and sleep latency (SL; min)] were assessed. Body fat % was tested as a mediator of the relationship between TST and ISI. Results: Longer TST was associated with better insulin sensitivity (P = 0.02), but not after adjusting for body fat %. Sleep parameters were not associated with IGI or DI. Longer TST was associated with lower % body fat (P = 0.01) and lower waist-to-height-ratios (P = 0.05). Body fat % explained 62% (P = 0.01) of the relationship between TST and ISI. Longer TIB was associated with lower adiposity measures (P < 0.05). There were no associations between SE, WASO, or SL and metabolic outcomes. Conclusion: Objectively measured sleep duration was associated with lower adiposity, and the relationship between sleep duration and ISI appeared partly through adiposity levels in preadolescent children. Longer sleep duration may be important for metabolic health.

Comprando Rico y Sano: Increasing Latino Nutrition Knowledge, Healthful Diets, and Food Access Through a National Community-Based Intervention.

PURPOSE: Evaluation findings from Comprando Rico y Sano (CRS), a culturally relevant, community-based intervention addressing nutrition knowledge and food access are presented. DESIGN: No-control quasi-experimental intervention with pre, post, and follow-up assessments. SETTING: CRS was promotores-led through UnidosUS's Affiliate Network of community-based partners. SAMPLE: Low-income Latino adults (N = 966) receiving services at 25 partner sites. INTERVENTION: CRS was a six-hour intervention focused on nutrition knowledge and consumption of fruits, vegetables, and home-prepared meals. It also provided guidance for health-conscious grocery shopping, Supplemental Nutrition Assistance Program (SNAP) information, and enrollment assistance. MEASURES: Self-report surveys assessed nutrition knowledge; intention to change; and frequency of fruit, vegetable, and home-prepared meal consumption. Sites reported monthly SNAP enrollment data. ANALYSIS: Paired-samples t-tests and repeated-measures ANOVAs assessed changes in knowledge, intentions, and behavior from pre-to-post (n = 960) and pre-to-follow-up (n = 115). RESULTS: Pre-to-follow-up increases in nutrition knowledge (P < .001) were observed. Intention to consume more vegetables (P = .027) and home-prepared meals (P < .001) also improved between pre- and follow-up. Increases from pre-to-follow-up were observed for frequency of consuming fruits (P = .007), vegetables (P = .001), and home-prepared meals (P < .001). Across 16 months, 24,359 Latinos enrolled for SNAP. CONCLUSION: Large-scale community collaborations to deliver culturally relevant nutrition education and SNAP enrollment assistance can increase food access, health literacy, and promote healthful diets for Latinos.

Examining the role of ethnic microaggressions and ethnicity on cortisol responses to an acute stressor among young adults.

Objective: This study examined whether the frequency of experiences of ethnic microaggressions and the sensitivity to such experiences were associated with cortisol responses to an acute social stressor (Trier Social Stress Test; TSST) among an ethnically diverse sample of young adults (N = 109, Mage = 18.82 years, SD = 1.40 years, 74% female, 44% Latinx). Method: Self-reported experiences of and sensitivity to microaggressions were assessed using the Everyday Microaggressions Scale. Participants' salivary cortisol was collected before, immediately after, and at three 15-min intervals after the TSST (for a total of 5 salivary samples) to assess their cortisol responses to an acute social stressor. Results: Mixed model analyses revealed that experiencing a higher frequency of microaggressions (p = .005) and being more sensitive to those experiences (p = .001) were associated with a more blunted cortisol response (i.e., lower cortisol reactivity and recovery) to the TSST, relative to experiencing a lower frequency of microaggressions and being less sensitive to them. Furthermore, this blunted cortisol response to the TSST was more prominent among young adults of Latinx and other ethnic backgrounds (i.e., biracial, African American, and Native American) compared to their Asian American and non-Hispanic White peers (p = .034). Conclusion: Findings provide insight into the different ways in which experiences of ethnic microaggressions can be associated with biological markers of stress. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Hispanic/Latino heritage group disparities in sleep and the sleep-cardiovascular health relationship by housing tenure status in the United States.

OBJECTIVES: The objective of this study was to investigate whether the sleep-cardiovascular health (CVH) association varies by Hispanic/Latino heritage group and housing tenure status (i.e., homeownership, unassisted housing, government-assisted housing), which is an important social determinant of health. DESIGN: Cross-sectional analysis of pooled National Health Interview Survey (2004-2017) data. SETTING: United States. PARTICIPANTS: US-born/non-US-born Mexican, Puerto Rican, Cuban, Dominican, Central/South American, and US-born non-Hispanic (NH)-white adults. MEASUREMENTS: Within each housing tenure category, Poisson regressions with robust variance estimated the adjusted prevalence ratios (PRs) and 95% confidence intervals (CIs) of (1) habitual sleep duration (<6-hours, 6-<7-hours, and >9-hours vs. 7-9 hours) and sleep quality for Hispanic/Latino heritage groups compared with NH-whites and (2) ideal CVH for Hispanic/Latino heritage groups within each sleep duration category, separately, compared with NH-whites who reported 7-9 hours sleep duration. RESULTS: Among 283,767 NH-white and Hispanic/Latino adults (mean age=47.0±0.09 years, 50.1% female), 33% rented housing (4% government-assisted; 29% unassisted), and 67% were homeowners. Compared with their NH-white housing tenure counterparts, only Puerto Rican homeowners were more likely to report <6-hours (PR=1.70 [95% CI: 1.44-2.01]) and 6-<7-hours (PR=1.31 [1.19-1.44]) sleep duration. Overall, Hispanic/Latino heritage groups were either less likely or no more likely to report >9-hours sleep duration and poor sleep quality compared with NH-whites. Disparities in CVH were large between Puerto Rican unassisted renters and homeowners who reported >9-hours of habitual sleep compared with their NH-white housing tenure counterparts who reported 7-9 hours. CONCLUSIONS: Hispanic/Latino-white disparities in the sleep-CVH relationship may vary by Hispanic/Latino heritage group and housing tenure.

Adiposity, Depression Symptoms and Inflammation in Hispanic/Latino Youth: Results From HCHS/SOL Youth.

BACKGROUND: Inflammation is implicated as one of many factors related to the development of chronic disease; thus, identifying its modifiable risk factors offers potential intervention targets to reduce risk. PURPOSE: To investigate whether depression and anxiety symptoms may indirectly affect high-sensitivity C-reactive protein (hs-CRP) and plasminogen activator inhibitor-1 (PAI-1) through sleep duration and adiposity (i.e., percentage body fat and waist circumference). METHODS: Multiple regression analyses were performed on Hispanic Community Health Study/Study of Latinos Youth (ages 8-16 years) cross-sectional baseline data, which were weighted to adjust for sampling design. Data were collected at a clinical assessment, including fasting blood samples, self-report surveys, and objectively measured anthropometrics. RESULTS: Adjusting for sociodemographic covariates, depression symptoms were associated with log hs-CRP (ß = .011, p = .047) but not PAI-1 (p = .285). Percentage body fat and waist circumference were positively related to depression symptoms (p = .026 and p = .028, respectively) and log hs-CRP (p < .001 for both). When including adiposity in the hs-CRP model, the associations of depression symptoms with hs-CRP were attenuated and became nonsignificant. Monte Carlo confidence intervals (CIs) showed that the indirect effects from depression symptoms to CRP through percentage body fat (95% CI: .0006, .0119) and waist circumference (95% CI: .0004, .0109) were statistically significant. CONCLUSIONS: Results indicate that the association between psychological distress and inflammation may occur indirectly through adiposity in Hispanic/Latino children. If findings are replicated in causal designs, reducing depression symptoms and adiposity among Hispanic/Latino children may be avenues for primary prevention of inflammation in later years.

Age, Physical Activity Motivation and Perceived Stress in Minority Girls.

BACKGROUND: Physical activity in childhood and adolescence helps support physical and emotional health. PURPOSE: The study aimed to investigate if age was related to motivation for physical activity in minority girls, and whether the relationship may be potentially mediated by psychological or physiological stress. METHODS: This cross-sectional observational study recruited Latino and African American girls ages 8 - 12 years (n = 79) in Tanner stage 1 or 2 via purposive sampling. Intrinsic motivation and perceived stress were measured by self-report survey; morning salivary cortisol samples were taken to calculate cortisol awakening response to estimate biological stress reactivity. RESULTS: Increased age was related to higher intrinsic motivation to engage in physical activity. Lower perceived stress and lower awakening cortisol response were associated with higher intrinsic motivation. Bootstrapped mediation results indicated perceived stress may be a pathway through which age impacts intrinsic motivation for physical activity. CONCLUSION: While motivation to engage in physical activity may increase with age, perceived stress may dampen this motivation, resulting in decreased physical activity. Interventions to help increase pre-adolescent girls' engagement in active behaviors may benefit from reducing children's perceptions of stress.

Parents Report Competing Priorities Influence Snack Choice in Youth Sports.

OBJECTIVE: To describe parental perceptions of team snacks, factors that motivate snack choice, and perceptions of healthy snacking guidelines in youth sports. METHODS: Six in-depth group interviews were conducted among parents (n = 22) of children aged 4-12 years in 2 Los Angeles County Baseball Little Leagues. Interviews were audio-recorded, transcribed, and analyzed using thematic analysis. RESULTS: Parents perceived fruit as the ideal snack; this ideal was balanced with competing priorities, including children's preferences, cost, time, and social norms regarding snacks as rewards and team bonding. Although parents were supportive of promoting healthy snacks, they believed that snacking guidelines should not be mandated. CONCLUSIONS AND IMPLICATIONS: Developing messages that align with parents' motivations when choosing snacks could promote healthier snacking in youth sports. Future studies are warranted to explore drivers of snacking with a broader sample and to examine how to promote healthy snacks effectively.

Academic-Related Factors and Emotional Eating in Adolescents.

BACKGROUND: Existing literature indicates a relationship between stress and emotional eating in adults, yet limited research has examined the impact of school-related stress on emotional eating in adolescents. This study investigated the influence of academic factors on emotional eating among minority adolescents. METHODS: A survey was implemented among a sample of minority adolescents (N = 666) to investigate the relationship between emotional eating and 3 academic factors: academic self-esteem, grade point average (GPA), and academic worries. Forced-entry multiple linear regressions were used to test for relationships. RESULTS: Findings indicate that GPA, academic self-esteem, and academic worries were related to emotional eating scores in adolescents. There were no significant differences in academic factors between emotional eaters and nonemotional eaters. CONCLUSIONS: Additional research is needed to further elucidate the complex interaction between emotional eating behavior and academics.

Using path analysis to examine the relationship between sexual abuse in childhood and diabetes in adulthood in a sample of US adults.

To understand mechanisms underlying the relationship between adverse childhood experiences (ACE) and diabetes the study evaluated mediators of the relationship between childhood sexual abuse and diabetes in adulthood. This study used cross-sectional data from the 2011 Behavioral Risk Factor Surveillance Survey (BRFSS). Participants totaled 48, 526 who completed the ACE module. Based on theoretical relationships, path analysis was used to investigate depression and obesity as pathways between childhood sexual abuse, and diabetes in adulthood. Among adults with diabetes, 11.6% experienced sexual abuse. In the unadjusted model without mediation, sexual abuse was significantly associated with depression (OR=4.48, CI 4.18-4.81), obesity (OR=1.28, CI 1.19-1.38), and diabetes (OR=1.39, CI 1.25-1.53). In the unadjusted model with mediation, depression and obesity were significantly associated with diabetes (OR=1.59, CI 1.48-1.72, and OR=3.77, CI 3.45-4.11, respectively), and sexual abuse and diabetes was no longer significant (OR=1.10, CI 0.98-1.23), suggesting full mediation. After adjusting for covariates in the mediation model, significance remained between sexual abuse and depression (OR=3.04, CI 2.80-3.29); sexual abuse and obesity (OR=1.41, CI 1.29-1.53), depression and diabetes (OR=1.35, CI 1.23-1.47); and obesity and diabetes (OR=3.53, CI 3.20-3.90). The relationship between sexual abuse and diabetes remained insignificant (OR=1.09, CI 0.96-1.24). This study demonstrates that depression and obesity are significant pathways through which childhood sexual abuse may be linked to diabetes in adulthood. These results can guide intervention development, including multifaceted approaches to treat depression and increase physical activity in patients with a history of sexual abuse to prevent diabetes.

Relationship between individual categories of adverse childhood experience and diabetes in adulthood in a sample of US adults: Does it differ by gender?

AIMS: ACEs are known to increase risk for diabetes in adulthood. However, little is known about the differential impact of individual ACE categories on diabetes risk, and whether this relationship is gender specific. METHODS: Data from the 2011 BRFSS was used in this study. Participants included 48,526 adults who completed the ACE module across 5 states. Using logistic regression, we examined the odds of diabetes in adulthood related to eight individual categories of ACEs: sexual abuse, physical abuse, verbal abuse, mental illness, substance abuse, incarceration, separation/divorce, and violence. A gender interaction term was included to test if this relationship varied between men and women. RESULTS: In adjusted analyses, sexual abuse (OR 1.57, CI 1.240; 1.995) had the strongest positive association followed by verbal (OR 1.29, CI 1.117; 1.484) and physical abuse (OR 1.26, CI 1.040; 1.516). Having a parent with mental illness was also significantly associated with increased odds of diabetes (OR 1.19, CI 0.996; 1.416). No interaction between ACEs and diabetes status by gender in any of the eight categories was found. CONCLUSIONS: Overall, this study found that four ACE categories were significantly associated with increased odds of diabetes in adulthood with sexual abuse being the strongest predictor.

Mujer Sana, Familia Fuerte: The Effects of a Culturally-Relevant, Community-Based, Promotores Program to Increase Cervical Cancer Screening among Latinas.

OBJECTIVE: Although cervical cancer can be prevented through screening and follow-up, Latinas' rate of Pap tests remains low due to knowledge gaps and cultural and attitudinal factors. METHODS: This study used a single-group pre-/post-test design to evaluate the effectiveness of Mujer Sana, Familia Fuerte (Healthy Woman, Strong Family), an intervention intended to improve Latinas' cervical cancer prevention knowledge, attitudes, self-efficacy to obtain a Pap test, and intention to get tested. The intervention is delivered through a single session by promotores de salud, who use a culturally competent, linguistically appropriate toolkit. A total of 5,211 Latinas participated in the study. RESULTS: The evaluation indicated that participants had increases in knowledge, positive attitudes, self-efficacy, and intention to test. CONCLUSION: Latinas have a low rate of cervical cancer screening but a high rate of cervical cancer, and Mujer Sana, Familia Fuerte shows promise as a public health practice for use with this population.

Evaluation of a Community Health Worker Intervention to Reduce HIV/AIDS Stigma and Increase HIV Testing Among Underserved Latinos in the Southwestern U.S.

OBJECTIVES: Latinos are at an elevated risk for HIV infection. Continued HIV/AIDS stigma presents barriers to HIV testing and affects the quality of life of HIV-positive individuals, yet few interventions addressing HIV/AIDS stigma have been developed for Latinos. METHODS: An intervention led by community health workers (promotores de salud, or promotores) targeting underserved Latinos in three southwestern U.S. communities was developed to decrease HIV/AIDS stigma and increase HIV knowledge and perception of risk. The intervention was led by HIV-positive and HIV-affected (i.e., those who have, or have had, a close family member or friend with HIV/AIDS) promotores, who delivered interactive group-based educational sessions to groups of Latinos in Spanish and English. To decrease stigma and motivate behavioral and attitudinal change, the educational sessions emphasized positive Latino cultural values and community assets. The participant pool comprised 579 Latino adults recruited in El Paso, Texas (n=204); San Ysidro, California (n=175); and Los Angeles, California (n=200). RESULTS: From pretest to posttest, HIV/AIDS stigma scores decreased significantly (p<0.001). Significant increases were observed in HIV/AIDS knowledge (p<0.001), willingness to discuss HIV/AIDS with one's sexual partner (p<0.001), and HIV risk perception (p=0.006). Willingness to test for HIV in the three months following the intervention did not increase. Women demonstrated a greater reduction in HIV/AIDS stigma scores when compared with their male counterparts, which may have been related to a greater increase in HIV/AIDS knowledge scores (p=0.016 and p=0.007, respectively). CONCLUSION: Promotores interventions to reduce HIV/AIDS stigma and increase HIV-related knowledge, perception of risk, and willingness to discuss sexual risk with partners show promise in reaching underserved Latino communities.

Coping mediates the effects of depressive symptoms on sleep problems.

OBJECTIVES: To explore the relationships of perceived stress and depressive symptoms to sleep problems, testing for mediation by adaptive and maladaptive coping strategies. METHODS: Alternative high school students (N = 1676) completed self-report surveys. Cross-sectional data were analyzed via Preacher and Hayes' procedures for multiple mediation. RESULTS: The positive relationship between depressive symptoms and sleep problems was mediated partially by anger coping (positively related to sleep problems). The positive relationship between perceived stress and sleep problems was not mediated by coping strategies. CONCLUSIONS: Findings provide information on psychological factors that may lead to poor sleep outcomes, and are useful for developing health promotion interventions to impact lifelong health behaviors.

Engaging Community With Promotores de Salud to Support Infant Nutrition and Breastfeeding Among Latinas Residing in Los Angeles County: Salud con Hyland's.

The Salud con Hyland's Project: Comienzo Saludable, Familia Sana [Health With Hyland's Project: Healthy Start, Healthy Family],was developed to provide education and support to Latina mothers regarding healthy infant feeding practices and maternal health. The promotora-delivered intervention was comprised of two charlas (educational sessions) and a supplemental, culturally and linguistically relevant infant feeding and care rolling calendar. Results indicate that the intervention increased intention to breastfeed exclusively, as well as to delay infant initiation of solids by 5 to 6 months. Qualitative feedback identified barriers to maternal and child health education as well as highlighted several benefits of the intervention.

Double jeopardy: metabolic syndrome leads to increased sedentary behavior in peri-pubertal minority females.

While most studies have focused on investigating the preventive effects of physical activity on metabolic risk, the longitudinal impacts of metabolic syndrome (MetS) on activity levels is poorly understood. This study aims to examine the influence of MetS on initial activity levels and the trajectory of activity levels in Latina and African American female children over 12 months (n = 55, 9 ± 1 years). Metabolic measures, including fat and lean tissue mass by BodPod, fasting glucose, lipids, blood pressure, and waist circumference, were collected at baseline. Moderate-to-vigorous physical activity and sedentary behavior by accelerometry were collected on a quarterly basis. There were no significant differences in either initial activity levels by MetS status (Moderate-to-vigorous physical activity: 33 ± 12 mins/day for MetS, 48 ± 28 mins/day for Non-MetS, p = .12; sedentary behavior: 408 ± 57 mins/day for MetS, 421 ± 72 mins/day for Non-MetS, p = .67). Longitudinal declines in moderate-to-vigorous physical activity (p = .038) and increases in sedentary behavior (p = .003) were found. Daily sedentary behavior increased by 82.64 more minutes in youth with MetS than in those without over one year (p = .015). This study yields the first evidence of the adverse effect of MetS on sedentary behavior. Targeted intervention strategies to reduce progressive sedentariness evident in minority youth with MetS are warranted.

Temporal relationship between insulin sensitivity and the pubertal decline in physical activity in peripubertal Hispanic and African American females.

OBJECTIVE: Little attention has been paid to possible intrinsic biological mechanisms for the decline in physical activity that occurs during puberty. This longitudinal observational study examined the association between baseline insulin sensitivity (SI) and declines in physical activity and increases in sedentary behavior in peripubertal minority females over a year. RESEARCH DESIGN AND METHODS: Participants were Hispanic and African American girls (n = 55; 76% Hispanic; mean age 9.4 years; 36% obese). SI and other insulin indices were measured at baseline using the frequently sampled intravenous glucose tolerance test. Physical activity was measured on a quarterly basis by accelerometry and self-report. RESULTS: Physical activity declined by 25% and time spent in sedentary behaviors increased by ∼13% over 1 year. Lower baseline SI predicted the decline in physical activity measured by accelerometry, whereas higher baseline acute insulin response to glucose predicted the decline in physical activity measured by self-report. Time spent in sedentary behavior increased by ~13% over 1 year, and this was predicted by lower baseline SI. All models controlled for adiposity, age, pubertal stage, and ethnicity. CONCLUSIONS: When evaluated using a longitudinal design with strong outcome measures, this study suggests that lower baseline SI predicts a greater decline in physical activity in peripubertal minority females.

Eating breakfast more frequently is cross-sectionally associated with greater physical activity and lower levels of adiposity in overweight Latina and African American girls.

BACKGROUND: Eating breakfast is believed to promote a healthy body weight. Yet, few studies have examined the contribution of energy balance-related behavioral factors to this relation in minority youth. OBJECTIVE: We assessed the associations between breakfast consumption and dietary intake, physical activity (PA), and adiposity before and after accounting for energy intake and PA in minority girls. DESIGN: Cross-sectional data were obtained on body mass index (BMI), percentage body fat (measured by BodPod), dietary intake (measured with 3-d dietary records), and PA (measured with 7-d accelerometry) from 87 Latina and African American girls 8-17 y of age (75% Latina, 80% overweight). Dietary records were used to categorize girls as more frequent breakfast eaters (MF; 2 or 3 of 3 d; n = 57) or less frequent breakfast eaters (LF; 0 or 1 of 3 d; n = 30). Chi-square tests, ANCOVA, and multiple regression analyses were conducted. Mediation was assessed with a Sobel test. RESULTS: Compared with the MF group, the LF group spent 30% less time (12.6 min/d) in moderate-to-vigorous-intensity PA (MVPA; P = 0.004) and had a higher percentage body fat (P = 0.029). MVPA accounted for 25% (95% CI: -8.8%, 58.1%; P = 0.139) of the relation between breakfast consumption and percentage body fat. We were unable to show that energy intake or MVPA was a significant mediator of the relation between breakfast consumption and adiposity in this sample. CONCLUSIONS: Evidence suggests that among predominantly overweight minority girls, MVPA, but not energy intake, was associated with both breakfast consumption and adiposity; however, a lack of power reduced our ability to detect a significant mediation effect. Other unobserved variables likely contribute to this relation.