You can use this video as your first step to build your swimming endurance. Swimming long distances faster with less effort is something many people work on but they forget the basics sometimes. This video will help you identify the most important thing when building endurance.

00:00 - Endurance
00:25 - Swimmers with different endurance
00:55 - 4 body adaptations for endurance
01:23 - Where to start
01:45 - Secret endurance workout