The backstroke, also sometimes called the back crawl or the upside-down freestyle, is one of the four swimming styles regulated by FINA, and the only regulated style swum on the back. This has the advantage of easy breathing, but the disadvantage of swimmers not being able to see where they are going. It is also the only competition swimming style that has a different start. The swimming style is similar to an upside down front crawl. Both backstroke and front crawl are long-axis strokes.
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