Every job needs planning, and every level of training also needs planning, especially training for higher levels. Therefore, planning in the field of sports training is nothing but one of the important strategic scientific means that helps in developing and coordinating programs for the training process to reach the desired sports level. Research hypotheses: - There are statistically significant differences between the averages of the pre- and post-measurements in the level of some physiological variables and the level of skill performance, in favor of the post-measurement among the volleyball juniors of the experimental research group. - There are statistically significant differences between the averages of the pre- and post-measurements in the level of some physiological variables and the level of skill performance, in favor of the post-measurement among the volleyball juniors in the control research group. - There are statistically significant differences between the averages of the two dimensional measurements in the level of some physiological variables and the level of skill performance, in favor of the dimensional measurement for the experimental research group.