The article presents the research aimed at the scientific justification and experimental study of the methodology for improving the coordination of the legs and arms to reduce the energy consumption of butterfly swimming technique. The article discusses the improvement of butterfly stroke technique related to increasing the speed of the hands during the transition from the pull-up phase to the final repulsion phase in the underwater part of the butterfly stroke cycle, as well as with increasing amplitude and increasing the power of the second kick when the hands exit the water and during phases of carrying.
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