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Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics

Kinematic measurements conducted during bike set-ups utilise either static or dynamic measures. There is currently limited data on reliability of static and dynamic measures nor consensus on which is the optimal method. The aim of the study was to assess the difference between static and dynamic mea...

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Main Author: Holliday, Wendy
Other Authors: Swart, Jeroen
Format: Thesis
Language:English
Published: Department of Human Biology 2020
Subjects:
Bicycle
bike fitting
static
dynamic
3D analysis
kinematics
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access_status_str Open Access
author Holliday, Wendy
author2 Swart, Jeroen
author_browse Holliday, Wendy
Swart, Jeroen
author_facet Swart, Jeroen
Holliday, Wendy
author_sort Holliday, Wendy
collection Thesis
description Kinematic measurements conducted during bike set-ups utilise either static or dynamic measures. There is currently limited data on reliability of static and dynamic measures nor consensus on which is the optimal method. The aim of the study was to assess the difference between static and dynamic measures of the ankle, knee, hip, shoulder and elbow. Nineteen subjects performed three separate trials of a 10min duration at a fixed workload (70% of peak power output). Static measures were taken with a standard goniometer (GM), an inclinometer (IM) and dynamic three dimensional motion capture (3DMC) using an eight camera motion capture system. Static and dynamic joint angles were compared over the three trials to assess repeatability of the measurements and differences between static and dynamic values. There was a positive correlation between GM and IM measures for all joints. Only the knee, shoulder and elbow were positively correlated between GM and 3DMC, and IM and 3DMC. Although all three instruments were reliable, 3D motion analysis utilised different landmarks for most joints and produced different means. Changes in knee flexion angle from static to dynamic are attributable to changes in the positioning of the foot. Controlling for this factor, the differences are negated. It was demonstrated that 3DMC is not interchangeable with GM and IM, and it is recommended that 3DMC develop independent reference values for bicycle configuration.
format Thesis
id oai:open.uct.ac.za:11427/31052
institution University of Cape Town (South Africa)
language eng
last_indexed 2026-06-10T12:37:30.202Z
license_str Not specified — see source repository
provenance_str_mv Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository
publishDate 2020
publishDateRange 2020
publishDateSort 2020
publisher Department of Human Biology
publisherStr Department of Human Biology
record_format dspace
source_str UCTD — University of Cape Town Open Access Repository
spelling oai:open.uct.ac.za:11427/31052 Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics Holliday, Wendy Swart, Jeroen Fisher, Julia Bicycle bike fitting static dynamic 3D analysis kinematics Kinematic measurements conducted during bike set-ups utilise either static or dynamic measures. There is currently limited data on reliability of static and dynamic measures nor consensus on which is the optimal method. The aim of the study was to assess the difference between static and dynamic measures of the ankle, knee, hip, shoulder and elbow. Nineteen subjects performed three separate trials of a 10min duration at a fixed workload (70% of peak power output). Static measures were taken with a standard goniometer (GM), an inclinometer (IM) and dynamic three dimensional motion capture (3DMC) using an eight camera motion capture system. Static and dynamic joint angles were compared over the three trials to assess repeatability of the measurements and differences between static and dynamic values. There was a positive correlation between GM and IM measures for all joints. Only the knee, shoulder and elbow were positively correlated between GM and 3DMC, and IM and 3DMC. Although all three instruments were reliable, 3D motion analysis utilised different landmarks for most joints and produced different means. Changes in knee flexion angle from static to dynamic are attributable to changes in the positioning of the foot. Controlling for this factor, the differences are negated. It was demonstrated that 3DMC is not interchangeable with GM and IM, and it is recommended that 3DMC develop independent reference values for bicycle configuration. 2020-02-12T13:23:06Z 2020-02-12T13:23:06Z 2019 2020-02-12T13:22:51Z Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/31052 eng application/pdf Department of Human Biology Faculty of Health Sciences
spellingShingle Bicycle
bike fitting
static
dynamic
3D analysis
kinematics
Holliday, Wendy
Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
thesis_degree_str Doctoral
title Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
title_full Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
title_fullStr Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
title_full_unstemmed Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
title_short Intrinsic factors, performance and dynamic kinematics in optimisation of cycling biomechanics
title_sort intrinsic factors performance and dynamic kinematics in optimisation of cycling biomechanics
topic Bicycle
bike fitting
static
dynamic
3D analysis
kinematics
url http://hdl.handle.net/11427/31052
work_keys_str_mv AT hollidaywendy intrinsicfactorsperformanceanddynamickinematicsinoptimisationofcyclingbiomechanics

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