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How to do an open turn in swimming
Swim towards the wall.
When you're on your last stroke of the butterfly or breaststroke, move your head to look straight down at the bottom of the pool.
Your last stroke should bring you about half a body length away from the pool wall.
If you are more than half a body length from the wall, give an extra kick in the water to push yourself forward. Extend your arms to reach for the wall.