Biomechanics Essay

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Biomechanics is the overall topic that will be discussed throughout the presentation, this incorporates a brief discussion about water resistance, propulsion and buoyancy. Under lifesaving, appropriate techniques and the choice of stroke for the Timed Tow will be analyzed and justified.

The science which incorporates the internal and external forces acting on the human body and types of effects produced from these forces. By researching biomechanics you form an understanding of resistance and propulsion and can apply that to your performance. A variety of aspects are to be included when analyzing one’s self or others swimming techniques in the water, such as body position, both coordination of arms and legs, breathing technique and the position of arms and legs.

Skin resistance, wave resistance and turbulence resistance are three main types of resistance relating to humans and water. A layer of fluid is formed (boundary layer) on the skin which is in direct contact to the water, when the swimmer moves in one direction the Boundary layer interacts with the preceding layer of water gripping tightly. This creates a frictional force preventing forward movement without further propulsion, consequently called ‘Skin Resistance’. Wave resistance is a build up of fluid in front of the swimmer creating a high pressure zone, the faster the swimmer can travel the higher the pressure is in front of them. This pressure can be reduced by using appropriate streamline techniques causing less displacement of laminar flow. Turbulence resistance is the displacement of laminar flow, when swimming you create a high and low pressure zone causing a suction effect. Using efficient streamline techniques the water displacement is minimized and less eddie...

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...time with the stride to avoid a larger drag. Minimal faults occur when I lose coordination with the arms and legs causing the feet to drop creating more drag, overall my technique in most cases proves effective and efficient.

This is an ineffective tow due to the fact that the patient is not on top of the swimmer, my technique for the strides are correct. However if I was to correctly align my centre of buoyancy with the patient it would be more of an effective tow. By doing so it would prevent further drag and resistance, the amount of water displaced caused more eddies to form creating a suction affect. Overall my performance for the timed tow proved inefficient causing the patient to be submerged under water at some stages, positive aspects of the tow are the correct grip and strides.

This concludes the overall technique and biomechanics of my performance.

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