Introduction and Research Problem: - Sports training in its general sense is the educational and educational process that includes preparing the player or team in an organized manner, based on the best modern scientific means to achieve the desired goal. And sports training is not necessarily related to sport of higher levels only, but includes various sports activities, and for sports training in the content of its goals, all members of society, regardless of their different capabilities and abilities, are the broad rule in defining the goals and the scientific basis for their training curricula in proportion to the general sports and cultural trends of different age levels to ensure the practice of sport As a first step to achieve the foundations of reaching the higher levels. And the scientific and technical development that the world is witnessing at the present time has effectively helped in the development of various sports equipment and tools, which had a great impact in achieving the best sports achievements. And the use of equipment, means and training tools added to the training process a lot of benefit and speed in achieving training goals and proved its effectiveness as one of the important helping factors in reaching high levels in the elements of physical fitness that the player needs and thus speed in achieving victory, as these devices, methods and tools have special goals Some of them are involved in the process of correcting the movement paths, some of them are included in the physical aspects, some of which combine the two by facilitating performance and isolating extraneous movements and contractions that would negatively affect and thus delay the achievement of the ideal level of the player The handball game is a unit of mathematics that players need to have strength as it is the main pillar of the game because it depends mainly in achieving victory in the game, and the link between muscle strength and motor velocity is one of the requirements for sports motor performance in the handball game, and the strength characteristic needs continuous development in order to Players gain muscle strength as coaches use various methods, methods and training tools to improve the level of the game. Does the manufactured training device work on developing the strength of youth handball players, so the importance of our research lies in finding a training method that helps develop the strength of young handball players through the use of a suggested training device.