[header] How to swim the breaststroke [title] Do a warmup swim before assuming the core position. [step] Move around in the water for about five minutes before swimming the breaststroke. You could do another swimming stroke you're familiar with (like the backstroke or sidestroke). 
This will help your muscles warm up and help your body adjust to the water temperature. [substeps] If you don't know another swimming technique, walk along the bottom of the pool in a section where the water reaches your shoulders.