I feel much more comfortable just breathing on my right and breath every 2 strokes. I can breathe on my left and I practice it a little, but I think I am going to up the amount of practice I do on the left. I'm not sure if I care to learn to bilateral breathe. I just think as far as preventing injury and being able to change my breathing for the conditions of the course, it would be beneficial to feel comfortable breathing whichever way I need to.