Beware of regression of electrocardiographic abnormalities on detraining – It may not always mean ‘athlete's heart’ José Pedro Marques, António Freitas, João Abecasis

Electrocardiographic evaluation in athletes: ‘Normal’ changes in the athlete's heart and benefits and disadvantages of screening Sérgio Machado Leite, João Freitas, Manuel Campelo, M. Júlia Maciel

Morphological and functional changes in athlete's heart during the competitive season Nuno Cabanelas, Secundino Freitas, Lino Gonçalves