Contemporary approaches to improving technique of the speed in the crawl stroke swimming. namely roll-forward turn were considered in the paper. The performance efficiency is defined by the time covering 15 meter distance. The students of the sports mastering group aged 16-20 took part in the experiment. https://hlarfszwqj2up.dsiblogger.com/67920467/numerical-analysis-of-flow-and-heat-transfer-enhancement-in-a-horizontal-pipe-with-p-tt-and-v-cut-twisted-tape