Abstract The research aims to investigate the effect of taking doses of the food supplement creatine on the development of pulse and achievement indices for swimmers of 100m afternoon. The research was conducted on a sample of the national team, whose number was (6). The exploratory experiment was conducted on three swimmers from outside the main research sample, and after providing all the necessary supplies and needs to carry out the research, the two researchers, in cooperation with the team coach, proceeded to conduct the pre-test, which includes measuring the pulse index before the effort in the 100m swim back and after the effort and after 2 minutes after the end of the test That is, the two researchers administered doses of creatine to the research sample and after the completion of the dosing, the post-test was performed, the data were collected and treated statistically. The necessity of giving a nutritional supplement creatine, because of its importance in developing pulse indicators, which leads to improved achievement.