 This study investigated the effects of an inspiratory muscle training IMT program on the respiratory muscle strength and resistance and the aerobic physical performance PP of handball athletes. Nineteen male athletes took part in the study, allocated at random into the experimental group EG, n10 and the placebo group PG, n9, aged 191 and 225 years old, respectively. The respiratory muscle strength RMS was evaluated by measuring the maximum inspiratory and expiratory pressures MIP and MEP, respectively, the muscular respiratory resistance was evaluated by maximum voluntary ventilation MVV and the aerobic PP by applying the cardiopulmonary exercise test. Subsequently the volunteers were submitted to an IMT protocol 5 times a week for 12 weeks. 