The research aims to identify the effect of training program on the effectiveness of rotation by back flip and some physical abilities and a time of 100 meters backstroke swimming for junior swimmers. The researcher used the experimental approach with the unit sample to suit the nature of the study. The sample was chosen by the vertical method from the junior swimming in Sharkia Sports Club and registered in the Egyptian Federation of Diving and Rescue, in the age group 11-12 years, and its strength was (21) in the morning. The researcher concluded that the effectiveness of the training program on the experimental research sample in post measurements than the pre-measurements in the physical abilities under investigation and the increase in the effectiveness of rotation by the back flip and the improvement of time 100 meters back swimming. The researcher suggests using the training program to improve circulation in swimming and its effect on swimming time.