Objective. To assess the impact of exercise consultation on physical activity (PA) levels, anthropometric measures, and metabolic markers in obese adolescents. Methods. Obese adolescents (14-18 years) were randomized to either an exercise consultation (intervention group) or to review "Canada's Physical Activity Guide for Youth" (control group). Outcomes, including accelerometry, anthropometric...

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We define the energy of a perfectly isolated system at a given retarded time as the suitable null limit of the quasilocal energy E. The result coincides with the Bondi-Sachs mass. Our E is the lapse-unity shift-zero boundary value of the gravitational Hamiltonian appropriate for the partial system Σ contained within a finite topologically spherical boundaryB = ∂Σ. Moreover, we show that with an...

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AIMS To examine the ranking of workers in 15 European countries with respect to the extent that work is perceived to influence occupational stress. METHODS International interviewer administered cross-sectional survey. Control variables included demographics, perceived job conditions, and job satisfaction. A sample of working adults (n = 11 054) from 15 European countries were studied. RESU...

In this paper, we investigate the determinants of political instability in Latin America. In a panel of 18 Latin American countries from 1971 to 2000, we find that democratic countries experience less average instability in the region, indicating that the move to increased democracy in the last couple decades may alleviate the persistent problem of instability in the area. We also find that inc...