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TRACK AND FIELD SPRINTING Drive phase or (the start)

TRACK AND FIELD SPRINTING

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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 - PowerPoint PPT Presentation

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Page 1: TRACK AND FIELD SPRINTING

TRACK AND FIELDSPRINTING

Drive phase or (the start)

Page 2: TRACK AND FIELD SPRINTING

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.

Page 3: TRACK AND FIELD SPRINTING

SPRINT EVENTS FORINDOOR OUTDOOR60 meters 200 meters400 meters55m hurdles60m hurdles

100m200m 400m4x100m relay110 hurdles for men100 hurdles for

women

Page 4: TRACK AND FIELD SPRINTING

Phases of the sprinting

Drive phase or (the start)Acceleration phaseTransition phaseMaximum VelocitySpeed Maintenance

Page 5: TRACK AND FIELD SPRINTING

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.

Page 6: TRACK AND FIELD SPRINTING

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

Page 7: TRACK AND FIELD SPRINTING

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

Page 8: TRACK AND FIELD SPRINTING

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

Page 9: TRACK AND FIELD SPRINTING

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.

Asafa_Powell_Block_Start.mp4

Page 10: TRACK AND FIELD SPRINTING

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

Page 11: TRACK AND FIELD SPRINTING

The End