- Hips raised a little above shoulders
- Legs bent to allow drive, front 90 degrees, back 130,
- Shoulders move slightly forward of hands- added weight on the fingers
- Head in line with body
(Fig 3.1,
3.2) (Ballesteros 1979, Rice 2000)
This is a
vital phase of the block start as it creates the needed position for the
initial movement of the start. Within this position the athlete has lifted
their centre of gravity above their feet and ready to used gravitation fall of
the body or rotational movement to convert
the falling vertical momentum to linear motion (Byrnes 2012).
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Pictures sources 23-4-13- www.ibtimes.com,
Biomechanical
Principles
The main principle related with
this phase is potential energy. The athlete or object is in a position where a
great amount of mechanical energy can be created. Blazevich likens this to a
rock at the top of a cliff. If a rock was to fall it would develop velocity and
therefore kinetic energy. This is the same as an athlete in the set position.
They are poised and ready to move with explosive movement with the help of
gravity. The set position also assists in overcoming the inertia of the body
and the resist in motion change (2010).
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