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Title: A 'hydro-kinematic' method for quantifying the glide efficiency and the hydrodynamic parameters of a human body in a streamlined position during an underwater glide in swimming
Author: Naemi, R.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2007
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Abstract:
In the first study, a method was proposed to fit an appropriate mathematical function based on the equation of motion of the gliding body, to the kinematic position-time data of a swimmer performing a rectilinear glide with horizontal alignment and direction of motion. From the fitted function a glide factor that represents the ratio of inertial to resistive factors was deduced that defined the glide efficiency. This factor represented a combined kinematic and hydrodynamic measure of glide as it is an indicator of a normalized rate of changes in velocity, and demonstrates a ratio of assistive to resistive hydrodynamic parameters. The glide factor is a measure of glide efficiency and enables comparison between glide intervals both within and between individuals. It was found that this method of quantifying glide efficiency of a human body in a streamlined position is a valid, accurate and reliable method that is able to account for both the inertial and resistive characteristics of a body as well as the differences in the instantaneous velocity. A method of quantifying the hydrodynamic parameters of a human body in a streamlined position proposed in study 2 was found to be a valid, accurate and reliable method that is able to determine the inertial and resistive characteristics of a body at different velocities. In study 3 it was determined if the coefficients gathered from study 1 and 2 were sensitive enough to reflect the differences between different body shape characteristics. Series of anthropometric and shape characteristics, including dimensionless shape indices and joint angles which have been established as covariates of hydrodynamic coefficients, were examined, from which some showed to be significantly correlated to the hydrodynamic and glide characteristics of the human body in a streamlined position.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.659848  DOI: Not available
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