The research aimed to develop the digital level of the 50-meter crawl swimmer on the belly by designing a training program using compressive training in order to get acquainted with: 1- The effect of pressure training on some of the special physical abilities of 50-meter belly crawl swimmers under research. 2- The effect of compression training on the digital level of 50-meter crawl swimmers under research. The researcher used the experimental method, and one of the experimental designs was used, which is the experimental design for one experimental group using pre-post-measurement. The research sample was chosen by the intentional method from short-distance swimmers over 18 years old at the Tanta Sports Club in the 2022/2023 season, and the total number of the research sample was (14) swimmers, and the researcher randomly selected (5) swimmers for the exploratory study from the research community and outside the sample The basic research, and thus the basic research sample became consisting of (9) swimmers for the 50m belly crawl race. And among the research tools: -Special physical tests - Measuring the digital level of the 50-meter swimming crawl on the belly - the proposed training program using compression training