Vol. 6, Issue 2, Part E (2024)

The research aimed to prepare special exercises accompanied by blood flow restriction to develop the concentration of lactic acid in the blood of 100 m freestyle swimmers with Down syndrome, and to identify the effect of special exercises accompanied by blood flow restriction to develop the concentration of lactic acid in the blood of 100 m freestyle swimmers with Down syndrome. The researcher adopted the experimental method with two experimental and control groups to suit the nature of the research. The research sample was represented by the swimmers of the national team in the Olympic tourism 100m freestyle for people with Down syndrome, numbering (12) swimmers who represent 83% of the original community. They were randomly divided into two experimental and control groups, each group (6) swimmers. The researcher also sought to homogenize the research sample in some functional variables that may constitute an extremism in the test results. The main variables (Blood lactic acid concentration, 100 m freestyle swimming) related to this problem and the extent of their impact on these variables were identified and successful solutions were worked on to address this problem. The researcher conducted a mini-experiment similar to the real experiment on a sample of swimmers from the national team for Down syndrome, and from the original community other than the research sample, and recorded various observations about the tests regarding the validity of the instructions and the extent of the sample's awareness and understanding of the physical tests. It was implemented in the Olympic People's Pool on (April, 25, 2024). The researcher and the assistant work team conducted the pre-tests to test the concentration of lactic acid in the blood, and the 100-meter freestyle swimming test for people with Down syndrome in the indoor Olympic People's Pool on (April, 30, 2024) before starting to implement the exercise program accompanied by blood flow restriction, taking into account the appropriate time and place to perform the tests and how to conduct them. After that, the main experiment was conducted for two months, at a rate of (3) training units per week. After that, the post-tests were conducted after the end of the main experiment training if the blood lactic acid concentration test was conducted, and the 100 m freestyle swimming test for people with Down syndrome was conducted on (August, 27, 2024) in the indoor Olympic swimming pool and under all the time and space requirements, the assistant team, the devices and the tests. The researcher concluded that these exercises contribute to improving the physical performance of swimmers, by increasing the body's ability to endure and adapt to lactic acid levels, which may lead to improving the swimming time. The researcher recommended the use of blood flow restriction belts (PBFR) accompanied by low-intensity exercises. It must be taken into account whether the restriction is complete or partial in order to ensure the safety and security of the swimmer.