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A Comparison of Static and Dynamic Measures of Lower Limb Joint Angles in Cycling: Application to Bicycle Fitting

Bini, RR; Hume, P
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Permanent link
http://hdl.handle.net/10292/15197
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Abstract
Purpose

Configuration of bicycle components to the cyclist (bicycle fitting) commonly uses static poses of the cyclist on the bicycle at the 6 o’clock crank position to represent dynamic cycling positions. However, the validity of this approach and the potential use of the different crank position (e.g. 3 o’clock) have not been fully explored. Therefore, this study compared lower limb joint angles of cyclists in static poses (3 and 6 o’clock) compared to dynamic cycling.

Methods

Using a digital camera, right sagittal plane images were taken of thirty cyclists seated on their own bicycles mounted on a stationary trainer with the crank at 3 o’clock and 6 o’clock positions. Video was then recorded during pedalling at a self-selected gear ratio and pedalling cadence. Sagittal plane hip, knee and ankle angles were digitised.

Results

Differences between static and dynamic angles were large at the 6 o’clock crank position with greater mean hip angle (4.9 ± 3°), smaller knee angle (8.2 ± 5°) and smaller ankle angle (8.2 ± 5.3°) for static angles. Differences between static and dynamic angles (< 1.4°) were trivial to small for the 3 o’clock crank position.

Conclusions

To perform bicycle fitting, joint angles should be measured dynamically or with the cyclist in a static pose at the 3 o’clock crank position.
Keywords
Bike fitting; Joint kinematics; Photogrammetry; Videogrammetry
Date
2016
Source
Human Movement, 17(1), 36-42. https://doi.org/10.1515/humo-2016-0005
Item Type
Journal Article
Publisher
Wroclaw University of Health and Sport Sciences
DOI
10.1515/humo-2016-0005
Publisher's Version
https://www.termedia.pl/A-comparison-of-static-and-dynamic-measures-of-lower-limb-joint-angles-in-cycling-application-to-bicycle-fitting,129,32481,0,1.html
Rights Statement
Copyright: © 2019 Wroclaw University of Health and Sport Sciences. This is an Open Access journal distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode), allowing third parties to download and share its works but not commercially purposes or to create derivative works.

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