The goal of the final thesis is to explain what handball is, and why strength training is important in handball. Handball is a very dynamic sports discipline dominated by short actions, and a unique sport with a specific combination of physical demands. A big contribution to the game of handball can be attributed to the fitness preparation of handball players, within which programs for training strength, coordination, endurance, speed, agility are integrated and implemented. As for muscle strengthening, it can be achieved through exercises in the gym or on the field, and it must be functional according to the muscular demands of the specific activity. Jumps, changes of direction, throws and turns are movements that appear in every action. The goal of strength training is to raise the sports performance of the team to the highest level. Although strength and muscle power are extremely important in handball, they are not the only factors that determine success in this sport. Basic handball training is focused on improving technical and tactical skills.