When it comes to swimming, the crawl usually means. It is the fastest and simple style which swim also in indoor pools, and in open reservoirs. However, simplicity of the crawl is very conditional.
What is the crawl?
The crawl is the way of swimming on the breast and the back. Serial swings-grebki by hands and also moving and drawing apart legs are made. If to carry out comparisons, then hands will remind wings of the mill or the driving wheel of the steamship, and the leg - ordinary scissors.
When swimming by the crawl on the back occurs almost they are arms swings and movements by "scissors" - legs. However here hands move from under themselves for the head (on the breast all on the contrary).
Foot movements
When swimming by the crawl the body has to be extended and be located at the water surface. Immersion of the basin happens so that foot remained under water. The head is hung in water, the look goes forward and down. As the swimmer needs to do fungal movements and to inhale air, it shakes the body along the longitudinal axis to the right, to the left. Foot movements carry out up-down (if to take the vertical plane). The beginning of these movements occurs in the hip joint, continuation - in the shin, and finish them biting kick of the foot about water thanks to which the swimmer moves forward. At the same time the leg is unbent at first in the knee joint, and then - in talocrural. All foot movements should be carried out rhythmically, but it is free.
Arm movements and breath
As for arm movements, they can be subdivided into two phases. At first the fungus in water, then - the bringing over water is made. The hand is lowered in water, slightly bending in the elbow and turning the palm down. At the same time the hand has to fall ahead of the shoulder. Swimming by the crawl is the respect for the sequence of immersion: the brush - the forearm - the shoulder. After almost full straightening of the hand in water, pass to fungal movements. The brush the swimmer takes water, and the hand bent in the elbow forms the rowing surface. When there comes the main part of the grebk, the elbow is led to the trunk, and the brush is quickly moved back. In the closing stage the hand becomes straight, the brush passes near the hip. The important role is played by the hand bringing over water. At first raise the elbow, then the shoulder and the brush. The hand bent in the elbow joint is freely carried by over water. Fungal arm movements become in turn - when the fungus comes to an end with one hand, the second enters water. It is correct to float the crawl - it means also it is correct to breathe. Air is inhaled at turn of the head to the right or to the left, at the termination of the grebk by the hand. After the breath the head needs to be returned to the home position. The exhalation becomes when the person falls to water.