Basically you need to be faster than a competitive swimmer to build up endurance... my cousin was in competitive swimming and she went to a competition where there were a group of synchro swimmers who decided to like convert to speed swimming and they kicked some serious a$$! Also you want as many lengths of the pool that you can get in your aloted time of about 2 - 3 1/2 min.
...and Sarah your like my new best friend ^_^ where do you swim to?
...and Sarah your like my new best friend ^_^ where do you swim to?