research london transport workers study aerobics center longitudinal study parents' PA → progeny PA effects of grounding hyper-pronation therapy for the foot protein and weight loss effects of cold exposure naps and mortality Dietary Guidelines for Americans, 2020-2025 laetoli's lost tracks outdoor activity reduces the prevalence of myopia in children The evolution of human step counts and its association with the risk of chronic disease The emergence of egalitarianism in a model of early human societies Breaking Up Prolonged Sitting to Improve Cardiometabolic Risk: Dose-Response Analysis of a Randomized Crossover Trial Siesta in healthy adults and coronary mortality in the general population