Physical activity, metabolic syndrome, and coronary risk: the EPIC-Norfolk prospective population study - Broekhuizen, L M; Boekholdt, S M; Arsenault, B J; Despres, J P; Stroes, E S; Kastelein, J J; Khaw, K T; Wareham, N J (Eur J Cardiovasc Prev Rehabil, 2011)