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Levels and patterns of objectively-measured physical activity volume and intensity distribution in UK adolescents: the ROOTS study

Paul J Collings*, Katrien Wijndaele, Kirsten Corder, Kate Westgate, Charlotte L Ridgway, Valerie Dunn, Ian Goodyer, Ulf Ekelund and Soren Brage

International Journal of Behavioral Nutrition and Physical Activity 2014, 11:23  doi:10.1186/1479-5868-11-23