In swimming competition, a rational disposition of physical strength is seen as a major factor in deciding the final outcome. Among various items in swimming competition, the issue of physical distribution over the 400m race has aroused the most extensive controversy. In this paper, concerning the achievements of elite athletes home and abroad in 400m freestyle swimming race, the principle of variation coefficient in statistics has been adopted and calculation is conducted in regard to the newly-defined speed coefficient. The features and disciplines in the tactics application of those top athletes are analyzed from a new angle about the adoption of phase speed pattern. It is hopeful that this paper could provide some valuable suggestions about the puzzle of physical distribution over the swimming competitions for swimming coaches in the process of their instruction.
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