One of the requirements for achieving success in sports is the selection of talents at an early age, and the training of children in accordance with their interests and abilities and in the light of scientific methods. Genetic predisposition is one of the most important factors to be considered for selection. Just as our genes do not only determine our hair and eye color, but also cover all metabolic processes, they are also determinants of which sports we are more prone to. For example, the fibril (muscle fiber, muscle cell) composition of our skeletal muscles is roughly divided into two groups: fast contractible and slow contractible. Which type we have more is genetically determined in our body. Fibrils, which can contract quickly and produce more power, get tired quickly, whereas those that slow contract cannot produce too much force and power, but they allow us to maintain a certain level of effort for a long period of time. Rather than attempting to make a child with a higher muscle fibrillation rate, which can contract quickly and produce more strength into a marathoner or a northern discipline skier, it would make more sense to lead him/her to branches, such as short-distance running, athleticism throwing or jumping disciplines. Similarly, it would not make sense to try to turn someone with a higher rate of slow contractile fibrils into shorter distance runner. Such an athlete can be more successful in branches that require durability. The body types are divided into three groups by kinanthropometry. These are body types with high muscle mass and low body fat called mesomorph, more elongated bones with low muscle and fat called ectomorph and low amount of muscle and high fat with shorter bones called endomorph. These characteristics should also be taken into consideration when selecting talent among children. A child, whose parents and even grandparents are short, may also be short. If there is no interest or talent, it will not be right to expect high level success by directing this child to branches such as basketball or volleyball where height is important. This child can be a good gymnast if he/she has talent and interest, and has a balanced, flexible and mesomorphic body type. Although environmental factors such as nutrition and exercise are effective, hereditary characteristics are of great importance in talent selection.