Two sport groups, all training physical educational and sports teachers at the H.N.I.P.S.S. of Dakar have been tested by measure of maximum consumption of oxygen (VO2max) before and after a three month aerobic training. The first group contained 10 abnormal hemoglobin (AS) subjects. The second group 11 normal hemoglobin (AA) subjects. The results do not show any difference in the reaction of adaptation between the two groups.