['Imbalance in shoulder rotator muscles has been considered a risk factor for injuries in handball. Strength training programs (STP) may play an important preventive role.', 'To verify the effects of an STP by using elastic band on shoulder muscles and ball throwing speed.', 'Randomized and prospective controlled trial.', 'Exercise Physiology Laboratory.', 'Thirty nine female handball players were randomly assigned to experimental (EG, n=21, 15.3±1.1yrs) or control (CG, n=18, 15.0±0.8yrs) groups.', 'The EG performed the STP with elastic band progressive exercises for six weeks before regular handball training and the CG underwent only their regular training.', 'Before and after the STP, both groups underwent a ball throwing speed test and isokinetic test to assess shoulder internal (IR) and external rotator (ER) muscular performance.', 'Average power values for IR muscles presented a significant group vs. time interaction effect (F=3.9, p=0.05), EG presented significantly higher values after the STP (p= 0.03). Ball speed presented higher values in EG after the STP in standing (p= 0.04) and jumping (p=0.03) throws. IR peak torque values and balance in shoulder rotator muscles presented no group vs. time interaction effect.'] Does strength Training Using Elastic Band improve Muscle Power and Throwing Performance in Young Female Handball Players?