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Title: Effect of workload, upper body posture, and saddle set-back on full body angular joint kinematics, muscle activity, and lower limb haemodynamics
Author: Edmundson, Christopher James
Awarding Body: University of Central Lancashire
Current Institution: University of Central Lancashire
Date of Award: 2008
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This thesis developed a comprehensive full-body three dimensional kinematic model and then determined the effects of workload, Upper Body Posture, and Saddle Setback on the leg, trunk, and arm kinematics of the cyclist. Competitive cycling has an extremely high aerobic component, and yet ironically there have been few studies investigating how workload or riding position affect lower limb blood flow haemodynamics. By using Near-Infrared Spectroscopy a cycling specific technique was developed to enable tissue oxygenation status of the lower limbs to be determined during cycling, which was then used to assess the effects of workload, trunk and hip angle, and saddle set-back on lower limb blood flow haemodynamics. It is unclear to what extent saddle setback affects lower limb and trunk muscle activity and cycling performance, and yet the sub-disciplines of cycling use markedly different bicycle set-ups. By using a custom cycle ergometer developed by the author this Thesis systematically assessed the effects of saddle setback on muscle recruitment and activation magnitude. When investigating the effects of bicycle set-up on cycling performance it is important to consider all the physiological and biomechanical determinants of success in unison, and how they inter-relate. To date there are no studies that have comprehensively studied the kinematic, haemodynamic, electromyographic, and associated crank kinetics simultaneously. As such this Thesis developed a methodology to evaluate the effects of changing workload, upper body posture, and saddle setback on full-body three-dimensional kinematics, lower limb blood flow haemodynamics, leg and trunk electromyography, and crank torque profiles, in order to arrive at the optimum riding position and highlight that compromises required when aiming to maximise cycling performance.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available