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# SPIKE FOR SUCCESS

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by

## Setaleki Lauaki

on 12 November 2014

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#### Transcript of SPIKE FOR SUCCESS

Preparation Phase
Preparation Phase
Introduction
Execution Phase
Body Segments
Height of Release
Projectile Motion
Levers

Momentum
Force Summation
Co-ordination
In the "take off" of my volley spike it shows that I have created a momentum in order to approach the volley ball. In order to create momentum, Force summation was needed to be used effectively. Force summation is using as many segments of the body needed in the correct order beginning with larger muscles into smaller ones. When I jump for the spike, I create the force in my Gluteus Maximus which I transfer down to my Hip Flexors and Quadriceps. From my Hip Flexors and quadriceps, that force transfers into my Gastrocnemius. In the 1st phase the first two muscles are moving eccentrically, so after the energy is transferred from my Gastrocnemius to my feet to create my jump the two muscles then move concenntrically.
Stability and Balance
Force summation
Body Position
Body Segments
SPIKE FOR SUCCESS
Execution
In order to execute my spike I had to use the correct body segments in the right order. Creating movement in my shoulder joint to create force by transferring the force from my shoulder to my biceps. This is known as force summation when I use as many body segments as possible in the correct sequence using my larger muscles down to my small ones with correct timing through my greatest range of motion. That then causes a motion that allows me to create force onto the volleyball. Once my hand makes contact with the volleyball, the force that I had created has now transferred onto the ball or in other words Newtons 3rd law. Whenever a force is applied there is an equal and opposite reaction. When the volley ball leaves my hand it them becomes a projectile which is caused by the angle of release of my smash. In my smash I needed to make sure that my angle of release towards the volley ball spike was appropriate to the distance of my smash.
In this report, I will be explaining the difference in performance of my volleyball spike to a more skilled volley ball players spike. Also the bio mechanics used within the "Volley ball spike". I will be breaking down my spike into 3 phases.
Preparation Phase
Execution Phase
In each phrase I will break down each movement, explaining the bio mechanics of that movement. I will also be giving Feed forward and Feedback about my performance.
Momentum
Force Summation
Co-Ordination
The agonists in the first phase are the Glutes and Quadraceps, and the antagonists are the Hamstrings and the Hip Flexors. For the second phase, the Glutes/Quadraceps are the Antagonists and the Hamstring/Hip Flexors are the Agonists

Agonists & Antagonists
Phase 1
Phase 2
By Setaleki Lauaki
Phase 2
Phase 3
Phase 4
Execution
In the pictures below it shows that I extended my lever in my arm in order to apply maximum force to the volley ball. Also the height of release of my shot is reasonable to my smash.
Feed-back
Feed-forward
In the build up of my take off I had trouble with getting my timing right to execute the spike. I identified the reason why I had miss timed my jump was because my co-ordination within my joints and muscles was delayed. In my next attempt I will need to certify that my co-ordination in my legs following through to my my upper body is correct and well timed for the execution. In order for that to be possible I will need to practice on my footwork and co-ordination constantly until I feel confident and certain it will be successful next time coming.

Phase 1
Feed-back
Feed-forward
My execution would've improved more if I had timed my smash. Also if I had timed my jump I would have spent more time in the air because when I made contact with the volleyball my legs were already on their way down to land. In order to make my next execution shot successful, I will need to improve my momentum by running faster and also creating more force in my legs for the take off allowing me to spend more time in the air. the timing of my smash so that I will have a good chance of making my smash effective. I can improve this by timing my smash every time the ball is set.