Sport injuries are common in children and teenaggers, especially overuse injuries. Typical musculoskelotal disorders include apophyseal pains or avulsion, stess fractures, and also epiphyseal ostoochondritis. Some lesions are specific according the practice, such spine or wrist lesions. Prevention of sport injury should be the main priority as well for the parents than the coaches and children themselves. Proper education and preparation, specific training and streching are essential for all sports activities.