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The Biomechanics of the Fosbury Flop

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Jade Ryan

on 22 June 2014

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Transcript of The Biomechanics of the Fosbury Flop

The Biomechanics of High Jump- The Fosbury Flop

By Jade Ryan
Force and Motion
The run up is essentially the most important aspect
J Shaped Approach
This approach minimises air resistance which is the resistance exerted by any fluid including air on an object moving through it (Amezdroz, G et al. 2010).
Biomechanics is comprised of the laws of mechanics and physics and is applied to the human body to study the internal and external forces (Mackenzie, 2004).
The Run Up
Force is defined as an action that is applied to an object, causing it to start or stop or cause changes in the movement of the object, is applied to the ground, an equal and opposite reaction force is produced, this is known as linear motion (Amezdroz, G et al. 2010).
(abcteach.com, 2014)
Professional Technique
My Technique
Dominant foot behind
Jumping from right hand side
Maximum force exerted on ground
Side of Approach
Right foot placed behind my body
Jumping from right hand side
Inhibits force produced
Momentum is defined as a quantity of motion possessed by a body (Amezdroz, G et al, 2010)
The Transition Between the Run Up and
The Take-Off Phase
“The take-off phase is defined as the period of time between the instant when the take-off foot touches the ground and the instant when it loses contact with the ground” (Dapena, J. 1992).
A lever is a body segment that rotates around an axis and the lever that is most applicable to the fosbury flop is the first-class lever in which the axis is located between the effort and the resistance force (Amezdroz, G et al, 2010).
Centre of Gravity
Low centre of gravity
Rotational Motion
Professional v My Technique
The Flight
High centre of gravity
Rotational motion cannot be obtained after the athlete leaves the ground (Dapena, J. 1992) and occurs when an action is performed and an equal reaction is produced around a joint to create momentum (Amezdroz, G et al, 2010).
Rotation of hips, back and shoulders around the pelvis
Arched back
Hands alongside body
Centre of gravity falls below the athlete and the bar
Flick of the lower legs whilst arching back
Lands on shoulder blades
My Technique
Knocking of the bar during flight
My Technique
Landed on my back
Unable to complete a backwards somersault
Analysis of the Run Up
Running on the balls of her feet
Long, relaxed strides
My Technique
Flat footed

Under stride

Lack of momentum
Analysis of the Transition Stage
Gradual lowering of the hips
Almost straight take-off leg
Leaning away from the bar
My Technique
No lowering of the hips
No leg extension
Leaning into the bar
The Take-Off Phase
Leg extension
Little knee flexion
Knee drive
Arm drive
My Technique
Insufficient knee and arm drives
Cassy. (2013).
VisualPharm. (2013).
Mackenzie, B. (2003).
Krider, D. (2013).
Splung.com. (2014).
Rubenstein, B. (2011).
Crossley, S. (2014).
Leite, W. (2013).
Burns, M. (2013).
Leite, W. (2013).
Dapena, J. (1995).
Star Videos
Star Videos
Star Videos
Star Videos
Star Videos
Star Videos
Star Videos
Star Videos
The Rocking Chair Walk
Adding a Skip
Adding a Skip for Height
Skip for Height Without Leg Alternation
It can thus be seen that to enhance individual performance, biomechanical principles need to be analysed, errors in technique must be identified and through reflection and decision making, modifications to performance should be implemented.
Cassy. (2013). Cassy on Maintaining Momentum. Retrieved from http://reviewmetwice.blogspot.com.au/2013/11/cassy-on-maintaining-momentum.html
VisualPharm. (2013). Imagetools Rotation Icon. Retrieved from http://www.iconarchive.com/show/ios7v2-icons-by-visualpharm/Imagetools-Rotation-ccw-icon.html
Mackenzie, B. (2003). Levers. Retrieved from http://www.brianmac.co.uk/levers.htm
Krider, D. (2013). Oregon high jump record-holder Rachel Proteau is a model athlete. Retrieved from http://www.maxpreps.com/news/j-tZfpDqLkGLsXusfP4UNA/oregon-high-jump-record-holder-rachel-proteau-is-a-model-athlete.htm
Splung.com. (2014). Centre of Mass. Retrieved from http://www.splung.com/content/sid/2/page/centre_of_mass
Rubenstein, B. (2011). How to High Jump Using the Fosbury Flop. Retrieved from http://www.wikihow.com/High-Jump-Using-the-Fosbury-Flop
Crossley, S. (2014). 3D-Biomechanics. Retrieved from http://www.backmechanic.co.uk/3D-Biomechanics.html
Leite, W. (2013). Biomechanical Analysis of Running in the High Jump. Retrieved from file:///C:/Users/ryanja0/Downloads/Leite%20(1).pdf
Burns, M. (2013). High Jump Technique and Training. Retrieved from http://assets.ngin.com/attachments/document/0035/6344/hj_coaches_clinic_supporting_doc_20130201.pdf
Abcteach.com. (2014). Booklet: Physics- Force & Motion. Retrieved from http://www.abcteach.com/documents/booklet-physics-force-motion-37498
Dapena, J. (1995). Biomechanics of High Jumping. Retrieved from https://www.usatf.org/groups/Coaches/library/2007/High%20Jump%20Training/6hjtech.pdf
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