The research aims to know the effectiveness of a training program based on the principle of bilateral deficit to develop muscle strength in the shot put competition. The researcher assumes that there are statistically significant differences between the average measurement (pre-post) of the experimental group in muscle strength and the digital level of the shot put competition (under study) in favor of the post measurement. There are also statistically significant differences between the average measurement (pre-post) of the control group in muscle strength and the digital level of the shot put competition (under study) in favor of the post measurement. There are also improvement rates between the measurement (pre-post) of the experimental and control research groups in the level of muscle strength and the digital level of the shot put competition (under study) in favor of the experimental group. There are also statistically significant differences in the post measurement of the experimental and control groups in the level of muscle strength and the digital level of the shot put (under study) in favor of the experimental group. The researcher used the experimental method using the experimental method with two groups (experimental group, control group) in a way Pre- and post-measurement, as it is the appropriate method for the nature of the research, the research community was deliberately selected from third-year female students specializing in track and field competitions at the Faculty of Physical Education for Girls for the academic year 2023-2024 AD, the first semester, with a total number of (102) female students. The researcher selected the research sample from the research community randomly from third-year female students specializing in track and field competitions at the Faculty of Physical Education for Girls - Zagazig University, where the basic sample consisted of (40) female students, who were divided into two groups, one of which was an experimental group and the other a control group, each consisting of (20) female students. (10) female students were selected from the research community and outside the basic sample to conduct the exploratory study, so the total sample became (50) female students (basic sample, exploratory sample). The researcher concluded that training both parties together is better, especially in activities that require successive work such as shot put, and that the proposed training program using the bilateral deficit had a positive impact on developing strength Muscular and digital level in favor of the experimental group and the traditional program followed by the college had a positive effect on some variables and the digital level of the shot put competition for the control group. There are also differences in the improvement rates between the experimental and control research groups in the physical variables and digital level, as the improvement rate in the digital level of the experimental group ranged at a rate of (20.23%) while the improvement rate in the digital level of the control group ranged at a rate of (6.18%). It showed the superiority of the experimental group that used the training program based on the principle of bilateral disability over the control group that used the traditional program.