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Transcript of long jump
-Mackenzie, B. (2001). Brian Mac Sports Coach. Long Jump. Retrieved from http://www.brianmac.co.uk/longjump/
-Laube, S. (2013). Biomechanics of the Long Jump. Retrieved from http://optimumapproaclongjumptechnique.blogspot.com.au/?_sm_au_=isHwWNwKSjH2JRKH
-Luna, E (2007). Training Your Horizontal Jumpers: Part 1. Basics & Long Jump. Retrieved from http://www.coacheseducation.com/horiz/lj1/
-Linthorne, N (2012). Brunel University, Uxbridge. Biomechanics of the Long Jump. Retrieved from http://www.brunel.ac.uk/~spstnpl/Publications/Ch24LongJump(Linthorne).pdf
-Amezdroz, G., Dickens, S., Hosford, G., Stewart, T., & Davis, D. (2010), “Queensland Senior -Physical Education”, 3rd Edition, MacMillan Education, Australia.
-Hede, C., Russell, K., & Weatherby, R. (2011). PE: Senior Physical Education for Queensland. Oxford, Australia.
-Blazevich, A. J., (2010). Sports Biomechanics: The Basics. London: A & C Black Publishers
-Thompson, P. J. L. (1991). Introduction to coaching theory. International Amateur Athletic Federation. Retrieved from: http://www.coachr.org/biomechanics.htm
-Bridgett, L.A. and Linthorne, N.P. (2006) ‘Changes in long jump take-off technique with increasing run-up speed’. Journal of Sports Sciences, 24: 889–97.
A breakdown of the biomechanics.
- Main fault in my jump is the movement of my arms.
- Very simple drill can be applied and practiced in future athletic lessons to effectively initiate this change in technique.
broken into 4
The run up, take off, flight and landing
The following presentation outlines the biomechanical principals of long jump and also includes an analysis of my own jumping technique.
“Biomechanics is the science concerned with the internal and external forces acting on the human body and the effects produced by these forces”
(Mackenzie, B 2004).
looking at the body as a machine.
reduce chances of injury.
aids in correcting technical errors.
force and motion
principles of propulsion
Sir Issaac Newtons Laws of inertia, acceleration and action reaction also aid us in understanding the biomechanics of long jump.
Run up is crucial to long jump.
Faster the run up, more momentum for jump.
Accelerate to 95% of maximum sprinting speed.
Length of run up depends on each individual.
Newton's 1st two laws
LAWS: inertia and acceleration.
1. "The body remain at rest or in motion except when compelled by an external force to change its state".
2. "The acceleration of a body is proportional to the force causing it and takes place in the direction the force acts".
Newton's 3rd law
"To every action there is an equal and opposite reaction".
Maximizing horizontal velocity
- generate as much speed as possible.
-some horizontal velocity converted into vertical velocity.
EXPLANATION IN RELATION TO LONG JUMP
Athletes overcomes inertia at the beginning of run up.
Initial acceleration generated from force against ground.
Greater the force exerted, greater acceleration.
Force against ground generates equal and opposite reaction that moves body.
Athlete's leg acts as a LEVER against the ground, generating push.
-Important athlete's practice run up to ensure:
1. No horizontal velocity lost.
2. Athlete doesn't foul.
important to lower centre of gravity
to ensure that the horizontal velocity produced in the acceleration is not lost.
with particular focus on angles.
transfer of momentum is when some horizontal velocity converted to vertical velocity
fast run up = short duration contact with ground = lesser ability to generate large vertical force
Increase duration of ground contact by placing good well ahead of the centre of gravity.
Undesirable increase in horizontal breaking impulse.
therefore there's an optimum leg angle at touchdown
= 60-65% horizontal
As take off foot is planted:
Athlete's chin and hips should lift
focus should be directly ahead (not down at pit!)
take-off angle =
1. optimum knee drive
2. correct arm movement
“The purpose of inflight arm and leg action is to counteract forward rotation, maintain balance, and put the jumper into the optimum position at landing with the feet extended well beyond the athlete's centre of mass” (Luna, 2007).
Knee drive performed very well!
Video displaying knee drive
arm action ... not so good
My own arm action.
Many different flight types: the hang style, the hitch kick, the stride.
School level - focus should be placed on just 2 things:
Professional jumpers action.
The ideal landing position is shown in Figure 3.
dotted line displays = flight path of the body's centre of gravity.
-athlete’s heels should aim to land just before the probably flight path
-doesn’t fall back into the sand
-instead press their heels, contract hamstrings (hips rise), and thus twist hips to one side.