Effects of different training protocols on left ventricular myocardial function in competitive athletes: A Doppler tissue imaging study. - D'Andrea,A.; Caso,P.; Severino,S.; Galderisi,M.; Sarubbi,B.; Limongelli,G.; Cice,G.; D'Andrea,L.; Scherillo,M.; Mininni,N.; Calabro,R. (Ital Heart J, 2002)