Swimming as a sport requires a large amount of core and abdominal strength to swim efficiently and effectively. Those that can control their core and have strong abdominal musculature, tend to perform at a higher standard than those who do not. Not only that, many of the injured swimmers I have seen with injuries relating to their lower limb, back or shoulders, have all had decreased abdominal strength. Working together on abdominal strengthening, and the injury, they were able to return to the pool better and stronger than ever. Nevertheless, these exercises are not just for swimmers and can be completed by anybody.