Swimmers are often required to hold their breath or to control their breathing patterns. This can be challenging for many swimmers--especially younger-- and requires training to improve and master. Much of that breath training is done in the water, but some can be done on land in yoga.
Yoga actually helps an athlete learn how to breathe better. Attention is brought to inhaling and exhaling purposefully and in a relaxed state. The breath begins to be used as a relaxation tool in yoga which can translate to big benefits come race time.
During yoga practice swimmers learns the power of quality breathing in their races, and develop the skill of being able to remain relaxed under duress. This can pay off both in the heat of a race, but also behind the blocks when nerves are running high.