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volleyball analysis

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Introduction Since volley ball was first played the spike has been an important component of the game. The objective of the volleyball spike is to receive the ball off the setter and return the ball over the net with great force. It is important to the game of volleyball because it is hard to return due to the force that it is hit to the defending team. The spike incorporates many biomechanical principles, these include vertical height, momentum, lever systems, Newton's laws, forces, load and centre of gravity. If all these principles are present in a spike, it will more often then not be skilful and successful. The following report will analyse my spike with reference to biomechanics and their importance in the spike technique. The volleyball spike can be divided into 3 phases, these are approach and take off, attack and recovery. Analysis and evaluation 1. Approach and take off The aim of the approach and take off phase is to transfer forward momentum into vertical momentum by taking multiple steps and pushing off with your two legs gaining maximum height and positioning the body for the attack phase. My technique in this phase was average as I gained some momentum and pushed off to a reasonable height, but not maximum. My body height was reasonably low which lowered my centre of gravity, causing the take off to be more powerful then one at a normal height. ...read more.


This is achieved by the swinging through of the attacking arm which hits the ball with the palm of the hand. My technique in this phase was good although I didn't get the ball over the net due to a lack of vertical height as stated previously. Just before I hit the ball my trunk is extended which allows extra forward motion in hitting the ball. My shoulder was also extended which also allows more forward motion. My legs are straightened to ensure that my balance is perfect and I don't fall backwards or forwards in the air. My trunk and hitting shoulder becomes flexed as they swing through and hit the ball. When I hit the ball my hand also flexes (bends forward) to add more force to the hit as well as decrease the angle the ball travels. Strengths > The extension of my trunk and shoulder as well as the flexion of my hand help increase the power of my spike because more body parts are involved in the motion causing more force to be produced (summation of forces). > Another strength is when I straighten my legs which keeps my centre of gravity in the centre of my body not outside of it which will cause me to be unbalanced. ...read more.


2. Attack In the video, the spiker has bent his arm the full distance behind him and to the full angle which helps him hit the ball with great force. In my spike this aspect of attack was a weakness of mine and if I bent my arm the full distance, I would gain a lot more power on my shot and it would benefit my performance. The way in which the spiker has extended his trunk and shoulders backwards are one similarity which are excellent examples of the correct method of spiking a volleyball. 3. Recovery In the video, after the spiker has hit the ball, he lands using two feet and flexing (bending) his knee and hip joints. If I incorporated this method of landing into my recovery phase I would absorb the force of landing and safely land reducing the chance of injury and reducing the chance of falling forward into the net. Conclusion The following report has analysed the technique and features of my own spike discussing the strengths and weaknesses of it. With reference to a video of a professional spike, I have also made recommendations for my spike to improve my performance and reduce injury. I predict that if these modifications are carried out, my performance in volleyball will be lifted to a new standard and I can therefore try to complete more complex plays which will benefit my team. ...read more.

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