The study aimed to prepare exercises within the training curriculum using maximum strength to develop muscular strength for achieving the long jump for under 18 years of age. The effect of maximum strength exercises in developing muscular strength and long jump achievement for those under 18 years of age. The researchers assume that there is an effect of exercises in the post-tests between the control and experimental groups and in favor of the experimental group in the research variable. The experimental technique (also known as the equal groups method) was used by the researchers because it is the best strategy for resolving the research issue and achieving the study's goals. The research sample consisted of (6) players divided into two groups—control and experimental—each with three players, and each group was homogenized separately using the coefficient of variation in the research variables as well as following the exploratory experiment and cardiac tests. The research sample also included players from Kerbala Governorate clubs competing in the long jump competition who were under the age of 18—a total of (8) players. For eight weeks during the special preparation phase, the researchers used their activities to train participants for two training units each week on Sunday and Wednesday. Each week, the length of the training units changed, and the researchers utilized a variety of training intensities, from (80-100%). techniques for repeating high-intensity interval training according to the level of intensity. The study's findings lead the researchers to the conclusion that the most crucial suggested workouts promoted the growth of muscular strength via maximal strength training. Due to their significance in increasing the degree of physical strength among long jumpers, researchers advised implementing the workouts specified by experts.