A brief bout of moderate intensity physical activity improves preadolescent children's behavioral inhibition but does not change their energy intake.

Children in rural communities consume more energy-dense foods relative to their urban peers. Identifying effective interventions for improving energy intake patterns are needed to address these geographic disparities. The primary aim of this study was to harness the benefits of physical activity on children's executive functioning to see if these improvements lead to acute changes in eating behaviors. In a randomized crossover design, 91 preadolescent (8-10y; M age = 9.48 ± 0.85; 50.5% female; 85.7% White, 9.9% Multiracial, 9.9% Hispanic) children (86% rural) completed a 20-minute physical activity condition (moderate intensity walking) and time-matched sedentary condition (reading and/or coloring) ~ 14 days apart. Immediately following each condition, participants completed a behavioral inhibition task and then eating behaviors (total energy intake, relative energy intake, snack intake) were measured during a multi-array buffet test meal. After adjusting for period and order effects, body fat (measured via DXA), and depressive symptoms, participants experienced significant small improvements in their behavioral inhibition following the physical activity versus sedentary condition (p = 0.04, Hedge's g = 0.198). Eating behaviors did not vary by condition, nor did improvements in behavioral inhibition function as a mediator (ps > 0.09). Thus, in preadolescent children, small improvements in behavioral inhibition from physical activity do not produce acute improvements in energy intake. Additional research is needed to clarify whether the duration and/or intensity of physical activity sessions would produce different results in this age group, and whether intervention approaches and corresponding mechanisms of change vary by individual factors, like age and degree of food cue responsivity.

Social desirability bias is related to children's energy intake in a laboratory test meal paradigm.

Dietary intake is notoriously difficult to measure in children. Laboratory test meals address some of the methodological concerns of self-report methods, but may also be susceptible to social desirability bias, referring to the tendency for individuals to adjust their behaviors in order to be perceived more positively. The aim of the current study was to evaluate whether social desirability bias was associated with children's energy intake during a laboratory test meal, and whether this association varied by food type (total caloric intake, snack food intake, fruit/vegetable intake) and sex. A total of 82 children (M age = 9.45 ± 0.85; 50 % girls; 84.1 % rural; 85.4 % White) completed several surveys, including the Children's Social Desirability Scale and had their body composition measured. At lunchtime, they were granted access to a multi-array test meal (>5000 kcal). After adjusting for lean mass, fat mass, depressive symptoms, and parental food restriction, children who reported higher social desirability bias consumed fewer calories from snack foods (B = -11.58, p = .009, semi-partial correlation = -0.28). Boys with higher social desirability bias consumed less calories from fruits and vegetables (B = -6.47, p = .010, semi-partial correlation = -0.411); this association was not significant in girls. The desire to be perceived in a positive manner may influence children's eating behaviors in experimental paradigms. Replication studies with larger, more diverse pediatric samples are needed, as are strategies to reduce the effects of social desirability bias on test meal intake in order to enhance the validity of this dietary assessment approach.

Body dissatisfaction and ethnic identity are associated with loss of control eating among young adult African American men.

African American men are rarely the focus of attention in investigations of loss of control (LOC) eating. Theory and extant data support a robust link between body dissatisfaction and LOC eating behaviors in women. Ethnic identity may buffer this association, as the degree to which racially and ethnically diverse women identify with their ethnic group has been shown to decrease the relevancy of the Western culture body ideal, thereby decreasing disordered eating pathology. These associations have not been evaluated in African American men. The current study examined the link between body dissatisfaction and LOC eating frequency in 261 young African American men (1830 years old). Ethnic identity was evaluated as an independent variable and as a putative moderator. After adjusting for income, education, and body mass index, body dissatisfaction was significantly and positively associated with LOC eating frequency (p < .001). Ethnic identity did not function as a significant moderator (p = .84) but was significantly and inversely associated with LOC eating frequency (p < .001). Although longitudinal studies are needed, these data suggest that there may be multiple pathways through which young African American men engage in LOC eating. Similar to extant research with women and other ethnic groups, body dissatisfaction appears to play a role in the LOC eating of African American men. Additional research is needed to clarify the nature of the association between ethnic identity and LOC eating in this population.