The Swimming in triathlon


The head, trunk and coordination in the style crawl



The trunk and its movements



The objectives of the perfect posture of the body of a swimmer are mainly:

  • 1. Try the highest penetration rate possible.
  • 2. To reduce resistance absorbing as much as possible.
  • 3. Find coordination intramuscular (tensión-palanca) perfect.
  • 4. Preventing bone caps hamper movements.


    • The position of the trunk should be straight (EWM) with a small angle of incidence (placement) (the body area that is opposed to progress remains small, and thus the resistance to the advance). However, the body has to have some angulation in the sagittal plane (theorem of the sea) (theorem vernulli), but due to the low speed hit by a swimmer this has to be between 5 and 6 degrees.

    crawl

    The back is not to go curved and longitudinal midline; should remain fixed at all times respect to the angle of attack. If this angle increases, then the surface on which acts to resist the tide and eddies of the area swimmer in a logarithmic increase. Therefore, for every increase in the minimum degree of this bias could rise to the surface of the cube while resistance (this is the square) as a swimmer suction force later (this is the Hub). This gives us very little stake in the degrees of inclination with respect to the speed swimming and buoyancy of the swimmer. It can be said that the position with regard to the horizontality of the body is almost invariably regard to the speed.

    coordination



    We can say that using two types of coordination and its variants. In the first and most widely used, the arms alternate on stage propulsion, blocking the action propulsiva an arm until the other has not completed its drawn. This form of temporal coupling has two variants, or even three, you can see in the video section of this page.

    Coordination sliding Navarro (95) or scope (WK), or recovery (Didier Chollet):
    This coordination can be divided into three, as is an arm towards the other. All three have a common tracciona always one arm while the other recycled.


  • In the less open of the three, locked arm began its traction immediately after the completion of the drawn, producing always a time and making propulsive speed swimmer to be more consistent. This form is the most widely used and most benefits contains a priori. The search for a propulsion means that there is a constant velocity curve more round, saving energy regain velocity and turbulence are omitted, in the most mild deceleration.


  • follows arm locked front of his shoulder does not start the movement abajo-afuera until the other arm has not reached half of their recycling or recovery. The can see Thorpe in the 400 free in Athens or Phelps in the final of 400 styles. It is very similar to the one described above, the difference lies, which delays the onset of the drawn until the body is leveled and arm at the stage of recovery. In order to properly carry out this coordination has to make a milkshake propulsive enough to at the time that no arm produces propulsion, speed not falter too. As positive is that you start delineated arm was found still more water (depending on your body), making more effective the first curves performed.


  • The following notes are very difficult, at least in high-level swimmers. It consists of making a complete changeover in the movement of the arms. Just moving an arm each time. Until an arm not over water and air bases the other arm does not start its work. This way swimming has many advantages and few disadvantages. The only good thing that one might say, while retaining a strong beaten, which seeks the maximum length of swimming per cycle. While it pays at a frequency too low.


    • The head



    At the time of apnea head should be between 20 ° and 30 ° with respect to the sagittal of the spine. With regard to surface water, must be more or less up to the line of hair (KR) or Slightly higher. The eyes and vision direction should go forward and slightly down (EWM). Some 45 º degrees to the vertical (KR) (FN)

    When breathe



    Arm with breathing.



    This issue has clear what all authors. Top of the inspiration must begin at the end of the drive arm and that side must stop in the middle of recovering. The head has to be well placed before the entry of the hand to water. This movement must also be coordinated with the rotation of the body and longitudinal well match the time of maximum breathing with the top spin.

  • The following notes are very difficult, at least in high-level swimmers. It consists of making a complete changeover in the movement of the arms. Just moving an arm each time. Until an arm not over water and air bases the other arm does not start its work. This way swimming has many advantages and few disadvantages. The only good thing that one might say, while retaining a strong beaten, which seeks the maximum length of swimming per cycle. While it pays at a frequency too low.


    • Coordinacion crol




    Page created by Norberto Perezplata And Javier Solas, bachelor of science of sport. We reserve all intellectual property rights. Not allowing partial or complete copy of the contents described in this domain.