Genetic factors do play an important part in defining the physical abilities of players. However, anybody can develop this part of their game through undertaking fitness programs that meet the requirements of the game and that match the needs of the individual. In the case of younger players, fitness can also initially be developed by simply playing the game. Indeed, young aspiring players should initially concentrate on developing their technical and tactical skills. To get fit for professional soccer, this requires much dedication as training is often very demanding. High levels of stamina, speed, capacity to accelerate, strength, explosive power, agility, neuromuscular co-ordination... are required and need to be developed as much as possible.