For all you pro swimmers out there: I am really trying to focus on swimming right now, working hard on my form since I have none. Got the endurance part down though. I am wondering if, while wearing a pull bouy (all I can do right now cause of stress fracture) I should feel myself rocking. I am trying to turn side to side with each stroke. I really concentrated on this today and could totally feel my body rocking slowly back and forth with each stroke. Is this a good thing??