Light-intensity physical activity and cardiometabolic biomarkers in US adolescents

Active commuting to school and association with physical activity and adiposity among US youth

Background: Walking or bicycling to school (ie, active commuting) has shown promise for improving physical activity and preventing obesity in youth. Our objectives were to examine, among US youth, whether active commuting was inversely associated with adiposity and positively associated with moderate-to-vigorous physical activity (MVPA). We also examined whether MVPA mediated the relationships between active commuting and adiposity.

Methods: Using data of participants aged 12 to 19 years from the US National Health and Nutrition Examination Survey 2003 to 2004 (n = 789 unweighted), we constructed multiple linear regression models that controlled for dietary energy intake and sociodemographics. The main exposure variable was active commuting. The outcomes were BMI z-score, waist circumference, skinfolds and objectively measured MVPA. The product-of-coefficients method was used to test for mediation.

Results: Active commuting was inversely associated with BMI z-score (β = –0.07, P = .046) and skinfolds (β = –0.06, P = .029), and positively associated with overall daily (β = 0.12, P = .024) and before- and after-school (β = 0.20, P < .001) MVPA. Greater before- and after-school MVPA explained part of the relationship between active commuting and waist circumference (Sobel z = –1.98, P = .048).

Conclusions: Active commuting was associated with greater MVPA and lower measures of adiposity among US youth. Before- and after-school MVPA mediated the relationships between active commuting and waist circumference.

On eschatology and the 'return to religion'

We begin with Tony Blair's July 2009 Australian visit. Mr Blair converted publicly to Catholicism in 2008. In Australia that year, he argued that the West was facing an internal crisis of confidence, as well as external threats. Blair warned in particular against what he called 'aggressive secularism' and the Western tendency to 'see people of religious faith as people to be pushed to one side'. The Australian's 'editor at large', Paul Kelly, responded enthusiastically. Blair's position represented 'the best argument against the rise of secular intolerance and its distorting of history in the education system by seeking to downgrade or eliminate religion in the West's story'. This stood in contrast to the Australian Labour Party's disastrous' distancing from the Christian tradition. Kelly styled Blair as opposing 'the fashionable Western idea that religion can be suppressed or confined to the private realm' as 'a delusion and dangerous'. The Australian's position is not surprising, given the news paper's long- standing, US-influenced neoconservative position.

Pakistan's long-term stability remains concern to the US

The article discusses the implications of the Pakistani government's decision to begin talks with the Taliban.

Nest visit synchrony is high and correlates with reproductive success in the wild Zebra finch Taeniopygia guttata

Nest visit synchrony, whereby adults coordinate their visits to the nest, has been documented in several species of cooperative breeders. Visit synchrony may reduce nest predation rate or sibling competition, or instead follow from synchronisation of other behaviours, such as foraging. However, nest visit synchrony has rarely been considered in species with bi-parental care, even though it could conceivably bring similar fitness benefits to that seen in cooperative breeders. In addition, in species with bi-parental care, we might expect nest visit synchrony to reflect the quality of the pair or the overall coordination of breeding activity between partners. Here, we tested whether nest visit synchrony occurs in a classic avian model for the study of bi-parental care, the zebra finch Taeniopygia guttata. We found that in the wild, both zebra finch parents visited the nest very infrequently during nestling provisioning, with only one visit per hour, and that nest visits were highly synchronised with parents visiting the nest together on 78% of the visits. In addition, we found that nest visit synchrony was correlated with hatching rate, brood size at hatching and the number of offspring in the nest a few days prior to fledging. Our results suggest that, while more work is required to understand the benefits of nest visit synchrony in this species, considering behavioural synchrony and cooperation between mated partners may offer new insight into the study of parental investment, including in species with bi-parental care.

US foreign policy in the Middle East : the roots of anti-Americanism

Over the last sixty years, Washington has been a major player in the politics of the Middle East. From Iran in the 1950s, to the Gulf War of 1991, to the devastation of contemporary Iraq, US policy has had a profound impact on the domestic affairs of the region. Anti-Americanism is a pervasive feature of modern Middle East public opinion. But far from being intrinsic to ‘Muslim political culture’, scepticism of the US agenda is directly linked to the regional policies pursued by Washington. By exploring critical points of regional crisis, Kylie Baxter and Shahram Akbarzadeh elaborate on the links between US policy and popular distrust of the United States. The book also examines the interconnected nature of events in this geo-strategically vital region. Accessible and easy to follow, it is designed to provide a clear and concise overview of complex historical and political material. Key features include: •maps illustrating key events and areas of discontent •text boxes on topics of interest related to the Arab/Israeli Wars, Iranian politics, foreign interventions in Afghanistan and Iraq, the wars of the Persian Gulf, September 11 and the rise of Islamist movements •further reading lists and a selection of suggested study questions at the end of each chapter.

What helps children to move more at school recess and lunchtime? Mid-intervention results from Transform-Us! cluster-randomised controlled trial

Background 

"The university didn't actually tell us this is what you have to do": Social inclusion through embedding of academic skills in first year professional courses

This paper presents findings from a mixed methods project investigating first year social work students' perceived role in academic skills and thier development.  Students expressed the perception that academic skill requirements and how they would be assessed should be made explicit, and idenfied a stigma associated with accessing study support services.  The aper concluses that an intentional design strategy, such as embedding academic skills into the curriculum, helps bridge the different expectations between academics and students and hence constitutes a socially inclusive strategy to teaching professional courses sucha s social work, within higher education.  Recommendations to enhance the succes and sustainability of such an initiative in the current higher educacion environment are offered.

Dietary salt intake in Australian and US children and adolescents

Dietary salt intake in Australian children exceeds recommendations and children of lower socioeconomic background consume even greater quantities. In Australian and US children, salt intake was positively associated with sugar-sweetened beverages, indicating a potential link between salt intake and obesity. Public health strategies to reduce salt intake in Australian children are required.