1. Peculiarity of efforts made in Modern Pentathlon 1) Riding : efforts are made in somewhat unique positions under irregular and speedy conditions on the horse. 2) Fencing : efforts are characterized by complex movement in direct encounter with the opponent. 3) Swimming : Circulatory movement, especially that of upper-part of the body in needed. 4) Shooting : upper-part movement and constant lower-part still posture is needed. 5) Cross-Country : characterized by circulatory movement and resistance. 2. Characteristics in training process Modern Pentathlon, a combination of 5 completely different sports, needs a quantity of basic braining from the preliminary through skilled stage and its characteristics lie in how to harmonize and train these 5 sports. 3. Inter-relations among 5 sports 1) Swimming and Cross-Country need circulatory movement. In these two sports, Swimming needs accelaration of upper-part of the body and Cross-Country, lower-part. 2) A negative influence is proved between Fencing and Shooting. It is recommended to avoid immediate and consecutive training of these two sports. 3) There are positive influences between Cross-Country and Fencing, Shooting and Riding, Fencing and Swimming.