So what is a good body line? Here is a beautiful body line. The only critique I have for her is that her fingertips are slightly spread out at the top of that; but otherwise, your whole body’s under the surface you can see that the hips are high, the feet are together, everything is in pretty much one straight line. And yeah, she’s had a beautiful body line. This body like representation is a representation of low drag also lack of oxygen, it’s almost the most hydrodynamic position a swimmer can be in, a streamline is still slightly more hydrodynamic, but a body line is pretty much the same thing as a streamline, it’s just the hands are in a different place.