Editing Backstroke (section)

===Start===
[[File:BackstrokeStart.JPG|thumb|Backstroke start, waiting for the signal]]
The backstroke start is the only start from the water.<ref name=Lohn/> The swimmer faces the wall and grabs part of the start block or the wall with their hands. Ideally, there are grips on the block for this purpose. The legs are placed shoulder width apart on the wall with both heels slightly off the wall. Just before the starting signal, the swimmer pulls their head closer to the start block, while keeping the knees bent at a 90-degree angle. Some swimmers prefer to keep one foot slightly lower than the other during the start.

For the takeoff, the swimmer pushes their hands away from the block and swings their arms around sideways to the front. At the same time, the swimmer throws their head to the back. The swimmer then pushes away from the wall with their feet. Ideally, the swimmer's back is arched during the airborne phase so that only the feet and the hands touch the water while the rest of the body is above the water line. This reduces drag and permits a faster start. On September 21, 2005, FINA modified the backstroke start rule regarding toes below the water line. The feet can now be above the water, but not above or curled over the lip of the pool gutter.

After the start, the swimmer is completely underwater. Due to increased resistance at the surface, experienced swimmers usually swim faster underwater than at the surface. Therefore, most experienced swimmers in backstroke competitions stay under water up to the limit set by FINA (15 meters after the start and after every turn). Most swimmers use a butterfly kick underwater, as this provides more forward movement than the flutter kick. The underwater phase includes the risk of water entering the nose, so most swimmers breathe out through the nose to stop water from entering.

The swimmer's head must break the surface before 15 m under FINA rules. The swimmer starts swimming with one arm, followed by the other arm with half a cycle delay. The swimmer continues in regular swimming style, staying on the back for the entire time except the turns.