The word ’Training’ has been a part of human language since ancient times. It denotes the process of preparation for some task. This process invariably extends to a number of days and even months and years. The term ’Training’ is widely used in sports. There is, however, some disagreement among sports coaches and also among sports scientists regarding the exact meaning of this word. Some experts, especially those belonging to sports medicine, understand sports training as basically doing physical exercises. The term training refers to the acquisition of knowledge, skills, and competencies as a result of the teaching of vocational or practical skills and knowledge that relate to specific useful competencies. Physical activity and sports are known to positively affect childhood body composition (fat and bone tissue) development however, there are also some concerns about the potential negative effects that intensive physical training may have on a child’s growth and development. For example, it has been suggested that intense training at a young age adversely affects the growth and maturation of young gymnasts.