“…1, 3, 8), mostly in V2-V 4, sometimes together with coving of the S-T segment is quite common (table I), its reported incidence is generally 10-30% [3,26,28], Negative T waves were reported in athletes by other authors [12,18,28], but are quite uncommon (table I). Generally they are not considered as a pathological finding [20,24], but some authors believe that they may be indicative of the condition of over training [6,8], Figure 8 shows negative T waves in leads II, III, AVF in a 17-year-old basketball player who was diagnosed as suffering from over training; however, the ECG pattern remained unaltered following a month's rest.…”