1. From the K.G. Jebsen Center of Exercise in Medicine (V.M., B.M.N., A.-E.T., U.W., J.P.L.), Department of Circulation and Medical Imaging (B.H.A., A.S., O.R.), Norwegian University of Science and Technology, Trondheim, Norway; and Department of Cardiology, St. Olavs Hospital, Trondheim, Norway (V.M., B.H.A., A.S., O.R., J.P.L.)