1 IRCCS, Istituto Auxologico Italiano, Department of Cardiology, Cardiac Rehabilitation Unit, S. Luca Hospital, Piazzale Brescia 20, 20149 Milan, Italy.
2 Postgraduate School in Sport Medicine and Physical Exercise, University Milano-Bicocca, Milan, Italy.
3 Postgraduate School in Sport Medicine, University of Milano, Milan, Italy.
4 Department of Medicine and Surgery, University Milano-Bicocca, Milan, Italy.