# Hpe Biomechanics Essay

1579 words - 7 pages

Introduction

Biomechanics is the sport science field that applies the laws of mechanics and physics to human performance, in order to achieve a better understanding of performance in athletic events through modelling, simulation and measurement. (©1997 - 2010 Topend Sports Network)
It’s very also essential to have a good understanding of the application of physics to sport, as physical principles such as motion, resistance, momentum and friction play a part in most sporting events.
The main role of biomechanics is to recognize the mechanical cause or effects that establish the motions of living organisms. In relation to sport, biomechanics contributes to the description, explanation, ...view middle of the document...

Moreover I don’t shift my weight to my front leg which leads to a loss of momentum.
While on another note prior to release of the javelin I tend to have a fine cross over with my feet, which gives me a good centre of gravity as well as stability. My arm has a good follow through, and my weight transfer is good until execution.

I can improve my balance and stability by keeping my legs wider rather then have them close together. I also need to try shifting my weight to my front leg so that I don’t lose any momentum as well as balance and stability.

Generating force and momentum

Newton’s Law of Acceleration states that:
Any change in motion is directly proportional to the applied force and is made in the line of the force

This law is expressed by the following formula:

Force = Mass *Acceleration

Momentum is generated in an object at the same time as we take the mass of that object and get it moving in a specific direction, while force is generated as soon as whichever force acts upon the object.

A Strength that includes in my generation of force and momentum is a powerful follow thorough. My follow through is rather strong then weak and I keep the javelin up above my head while on the other hand I do have a small run up and my stance is quite small, as my legs should be apart for extra balance and stability. Another bad point is my hoping/jumping. When I release the javelin I do tend to jump for some reason, and because of that my javelin doesn’t go as far as I want it to.

I could improve my weaknesses by intriguing a faster run up and including a wider stand and therefore not jump or hop when I’m about to release the javelin.

Summation of forces

Combinations of forces are produced by different parts of the human body. When a person is moving or attempting to move an object, numerous parts of the body act together to maximize the force. In theory, force summation occurs once body parts act all together. (Sports online, 2009) In practice, the strongest and lowest body parts around the centre of gravity move first, followed by the weaker, lighter, and faster extremities. This is known as sequential acceleration and results in successive force summation. To gain a maximum force, summation also needs sequential stabilization of body parts, with some body parts having to be fixed at stable points whereas other parts produce the effective forces.

Starting from my legs, I take a little and slow run up. My hips rotation is very poor, because I hardly move my hips in the video. From then my non throwing arm rises just a little bit and then my shoulders rotate. The whole point is to observe in what order the body parts move. The correct sequence is legs, hips, shoulders then arms. However, in the video I don’t follow that sequence correctly. In the swingers program you can see it all taking place in order, but if you pause it and play it in slow mode, its all over the place since my run up and my throw isn’t as powerful as...

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