The importance of breathing both sides in Ocean Swims.
If the swim course is an open rectangle whereby you swim out for a short distance then head left or right along the shoreline then back in again, you can use the shoreline as a means of marking your position. However, this may require that you breath to a particular side that may be uncomfortable. So practice breathing on both sides during your freestyle swim training. Also, breathing on both sides will keep your stroke in balance and allow you to swim straighter for more strokes. During your swim training, practice breathing every three strokes. This will force you to breath on both sides. If you are uncomfortable at first, use fins or a pull buoy until you develop a feel for this. By GoggleProject