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TRACK AND FIELD SPRINTING

TRACK AND FIELD SPRINTING. Drive phase or (the start). What is sprinting . Sprinting, in athletics ( track and field ), is a footrace over's a short distance with an all-out or nearly all-out burst of speed. . SPRINT EVENTS FOR. INDOOR. OUTDOOR. 60 meters 200 meters 400 meters

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TRACK AND FIELD SPRINTING

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  1. TRACK AND FIELDSPRINTING Drive phase or (the start)

  2. What is sprinting • Sprinting, in athletics (track and field), is a footrace over's a short distance with an all-out or nearly all-out burst of speed.

  3. SPRINT EVENTS FOR INDOOR OUTDOOR • 60 meters • 200 meters • 400 meters • 55m hurdles • 60m hurdles • 100m • 200m • 400m • 4x100m relay • 110 hurdles for men • 100 hurdles for women

  4. Phases of the sprinting • Drive phase or (the start) • Acceleration phase • Transition phase • Maximum Velocity • Speed Maintenance

  5. Acceleration phase in terms of the drive phase • The objective of this phase is to leave the blocks and to prepare for the first stride.

  6. Points for an effective drive phase • Drive the back leg forward keeping the heel low until the shin is approx 45° to the ground and then drive the foot down hitting the ground just behind the body's centre of mass • Over the next 7-8 strides (approx. 10 metres) angle the shin of the front leg, before it is driven down, will increase by 6-7 stride so that by the 7-8 stride the shin is vertical to the ground. • Over the first 7-8 strides the whole body angle will increase from 45° to approx. 30° degrees - approx

  7. Points for an effective drive phase • Eyes focused on the track to keep low to allow the build up of speed • Forward lean of the whole body with a straight line through the head, spine and extended rear leg • Shoulders held back and relaxed, square in the lane at all times • Arms move with a smooth forward backward action - not across the body - drive back with elbows - hands move from approx. shoulder height to hips

  8. Points for an effective drive phase (cont) • Elbows maintained at 90 degrees • fully extended rear leg pushing off the track with the toes - drive the leg forward with a high knee action with the knee pointing forward On the ball of foot/toes at all times - feet pointing forward straight down the lane • The drive is maintained for first 20-30 metres (approx.16-17 strides) at the end of which the body is tall with a slight forward lean

  9. Biomechanics of the legs Leaving the Blocks • The aim of starting biomechanics is the development of maximum horizontal velocity and this is achieved by placing the body in the best biomechanical position to apply force.

  10. The biomechanical concepts • Pushing behind centre of mass causes forward rotation around centre of mass. • Forward rotation created by push off leg and the rear arm. • Forward rotation counterbalance by free swing led and front arm. • Lower heel recovery during drive phase reduces time to recover leg. This is achieved by the “piston” action with the leg and also by sweeping the toe across the ground

  11. The End

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