摘要：The early start to the sport of children still concerned scholars and researchers to the likely risks of competitive early, neglecting the safest procedure and come to damage caused by sedentary early. The child just started attending primary school turns his freedom of movement in a full-time sedentary. Physical activity and sport are fundamental stimuli for growth and improvement of physical, motor, mental and social- emotional in us. The lack of physical and sporting activity or excessive exercise can cause substantial damage during the growth phase, therefore we must respect the physiological limits dictated by the nature of the growth, and thus the primary purpose of the teachers and coaches should be that of the benefit of the children. The aim to examine some issues related to overtraining and the untrained
