The Important Point
The most important thing to remember in swimming the crawl stroke is the fact that the body should be kept perfectly flat on the water, the face and head partly submerged, the eyes preferably above the water and looking straight ahead. The arms are alternately reached out at a comfortable distance in front of the head, and on a direct line with the body, not pointing out sideways, but, if anything, pointing at the start of the arm stroke more nearly to the center line of the body.
The catch on the water should be taken at the beginning of each arm stroke, using the weight of the shoulders, without over-reaching, to get a good leverage on the downward pull. The arms must be brought straight down, stopping the pull about on a line parallel with the shoulders, and in recovering, describe a long oval, making sure that before the power of one hand is fully expended the other has taken up the motion, that it may be continuous, for it is this regular and steady pull of the arms, and not the thrash of the legs, that has the most to do with propelling the crawl swimmer through the water.
Breathing while using this stroke is harder than the other strokes, because the swimmer must not roll the body out of its straight line; therefore, the head and shoulders must be slightly turned in order to get the breath, which can be taken after swimming two or three strokes, but later on, when one has mastered the movements better, breathing should be done on each stroke, exhaling slowly under water.