Here are some technique tips. We are in the process of adding more.

Freestyle - Nonbreathing Head Position

Feeling the water level just above the hairline is a kinesthetic cue that helps to effectively position the head. Since humans are better at processing visual information, visual cues are often more effective. Seeing both the pool wall and bottom within the field of view are visual cues that ensure an optimal head position.

 

This head position makes it possible to optimally orient the body when not breathing (minimize the body cross section), and breathe without distorting the torso and legs. An optimal nonbreathing head position forms a bow wave along the side of the head so that only minimal head rotation is necessary to breathe in the trough of the wave.

 

Freestyle - Breathing Head Motion

As the breathing side hand passes beneath the head, the swimmer prepares to rotate the head. The head rotates with the push phase of the hand. Exhalation ends as the mouth rises above the surface. As the arm breaks the surface, inhalation begins. As the arm passes the shoulder on the recovery, inhalation ends and the head rotates to the nonbreathing position.

The head rotates until one eye (goggle) is above the surface and the top of the water is in the visual field. The head rotation only needs to be enough to bring the mouth above the surface. The eye that is above the surface can sight a point on the wall directly opposite the head.

 

Freestyle - Pull Phase

Most swimmers begin the freestyle pull with a straight arm. If the elbow is flexed as backward hand motion begins, more force is generated. As soon as the arm straightens at the completion of the arm entry, watch the elbow flex to begin the pull. If the rate of elbow flexion is sufficient, the hand will pass directly beneath the head.

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Two visual cues help master elbow flexion during the pull phase. At the completion of arm entry, see the hand directly in front of the shoulder. As the hand pulls back, see the hand pass directly beneath the head. With an optimal head position, both cues are within the swimmer's visual field.

 

Butterfly - Pull Phase

Most swimmers begin the butterfly pull with straight arms above the shoulders. If the arms complete the entry below the shoulders, they are in a stronger position to begin the pull. If the elbows are flexed as backward hand motion begins, more force is generated.

 

Two visual cues help master elbow flexion during the pull phase. At the completion of arm entry, see the hands directly in front of the shoulders. As elbow flexion begins, see the hands move to the inside of the elbows. With an optimal head position, both cues are within the swimmer's visual field.

 

Backstroke - Entry Phase

Most swimmers complete the entry phase in backstroke as soon as the arm breaks the surface of the water - that is, the speed of the arm slows down as the arm submerges, and then the arm begins moving laterally. This is counterproductive for three reasons: 1) loss of hand speed, 2) wasted time, and 3) misdirected force.
 
An effective entry phase is not complete until the arm is submerged to the point where an effective pull begins -  with the hand below the elbow and the elbow below the shoulder (as shown in the middle image below). To achieve this position it is necessary to keep the arm moving fast and downward after it hits the surface and until it is submerged far enough to begin an effective pull.

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Because the arm entry is out of the view of the swimmer, kinesthetic cues must be used for control. Feel the arm accelerate straight down to the surface and continue moving fast until the hand is submerged below the elbow and the elbow is below the shoulder. With adequate torso rotation, the arm will be in position to flex the elbow and begin an effective pull phase.

 

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