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Biomechanical measures of short-term maximal cycling on an ergometer: a test-retest study
Burnie, Louise Barratt, Paul Davids, Keith Worsfold, Paul Wheat, Jon
Burnie, Louise
Barratt, Paul
Davids, Keith
Worsfold, Paul
Wheat, Jon
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Publication Date
2020-08-11
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Abstract
An understanding of test-retest reliability is important for biomechanists, such as when assessing the longitudinal effect of training or equipment interventions. Our aim was to quantify the test-retest reliability of biomechanical variables measured during short-term maximal cycling. Fourteen track sprint cyclists performed 3 x 4 s seated sprints at 135 rpm on an isokinetic ergometer, repeating the session 7.6 ± 2.5 days later. Joint moments were calculated via inverse dynamics, using pedal forces and limb kinematics. EMG activity was measured for 9 lower limb muscles. Reliability was explored by quantifying systematic and random differences within- and between-session. Within-session reliability was better than between-sessions reliability. The test-retest reliability level was typically moderate to excellent for the biomechanical variables that describe maximal cycling. However, some variables, such as peak knee flexion moment and maximum hip joint power, demonstrated lower reliability, indicating that care needs to be taken when using these variables to evaluate biomechanical changes. Although measurement error (instrumentation error, anatomical marker misplacement, soft tissue artefacts) can explain some of our reliability observations, we speculate that biological variability may also be a contributor to the lower repeatability observed in several variables including ineffective crank force, ankle kinematics and hamstring muscles’ activation patterns.
Citation
Burnie, L., Barratt, P., Davids, K., Worsfold, P., & Wheat, J. (2023). Biomechanical measures of short-term maximal cycling on an ergometer: a test-retest study, Sports Biomechanics, 22(8), 997-1015. https://doi.org/10.1080/14763141.2020.1773916
Publisher
Taylor & Francis
Journal
Sports Biomechanics
Research Unit
DOI
10.1080/14763141.2020.1773916
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Article
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This is an Accepted Manuscript of an article published by Taylor & Francis in Sports Biomechanics on 11-8-2020, available online: https://doi.org/10.1080/14763141.2020.1773916
Series/Report no.
ISSN
1476-3141
EISSN
1752-6116