How can I improve my swimming technique?

How do I improve my swimming technique - I cant afford lessons or anything?

• I wanted to swim regularly as a form of exercise, the advantage being it is low impact and an all over toning thing. I cant afford lessons but I wanted to know how to improve my technique. I can swim but have never gone a full length because I get tired. Apparently I do not use my arms enough and they do not make a windmill when I swim. How can I improve my front craw technique , please?

• Answer:

  State-of-the-art freestyle begins at the front end of the stroke with a maneuver called the "catch." A skillful catch enables the swimmer's hand to engage water early in the stroke, boosting the power and stride length of the entire pulling pattern. There is much to learn from a careful dissection of the front-end mechanics of champion freestyle. As the freestyler's recovering arm slices into the water, two movements occur that permit the hand to catch water at maximum forward extension. First, the body rolls downward to the same side, and second, the shoulder pushes forward from the chest. These are movements that everyone uses in their daily lives when stretching to reach something just beyond their grasp. At this point, physiology becomes a problem. The human arm, when reaching to full extension, is designed to swivel clockwise in the socket joint of the shoulder. This puts the arm in the dreaded dropped-elbow position, a posture favorable for grabbing solid objects, like branches of trees, but not conducive to grabbing that fluid medium called water. Instinctively, the champion freestyler counteracts this natural tendency of the arm to swivel to the dropped-elbow position. As the hand slices forward, the champion freestyler rolls the arm counterclockwise to the famous high-elbow position. This is an ingenious maneuver because it brings into play the levering action of the mighty latissimus muscle, enabling the hand to lever forcibly against the water. If performed briskly, it produces a solid feel of water pressure against the hand, a sensation described by Johnny Weismuller as "grabbing a handful of water." (see figures 1 & 2) Now, having grabbed onto the water, the freestyler must hang on to it. That is, the hand must anchor firmly against the pressure of the water until the power phase of the stroke takes over to drive the arm inward and backward to the hip. Hanging on to water is accomplished by the two-fold movement of bending the elbow and rolling the shoulder forward to a position alongside the jaw. It is described aptly as the feel of "reaching over a barrel." The effect is to create a pivoting mechanism that gives the hand a backward pitch against the water while fixing the elbow in a high, stationary position. The average freestyler, unable to perform a pivoting style of catch, has no choice but to pull the upper arm backward as a means to maintain water pressure on the hand. But pulling the arm backward squanders the strong pulling action of the latissimus, the main muscle responsible for propulsion in swimming. A pivoting maneuver catches water by using the small rotator-cuff muscles of the shoulder, saving the latissimus to be used to best advantage later, in the pow-er phase of the stroke (see figures 3 & 4). Executing proper front-end mechanics is the cornerstone of great freestyle, setting in motion the chain of muscle movements that produces a beautifully efficient stroke. Interestingly, by tailoring the front end of the pulling pattern first, the mid-stroke and finish will almost take care of themselves.