Biomechanical measures of short-term maximal cycling on an ergometer: a test-retest study

Burnie, Louise, Barratt, Paul, Davids, Keith, Worsfold, Paul and Wheat, Jon (2020) Biomechanical measures of short-term maximal cycling on an ergometer: a test-retest study. Sports Biomechanics. pp. 1-19. ISSN 1476-3141 (In Press)

[img]
Preview
Text
Davids_BiomechanicalMeasuresShort-Term(AM).pdf - Accepted Version

Download (1MB) | Preview
Official URL: https://doi.org/10.1080/14763141.2020.1773916

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 × 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.

Item Type: Article
Uncontrolled Keywords: maximal power, emg, kinetics, kinematics, Sprint cycling
Subjects: B100 Anatomy, Physiology and Pathology
C600 Sports Science
Department: Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: Rachel Branson
Date Deposited: 03 Nov 2021 15:55
Last Modified: 03 Nov 2021 16:00
URI: http://nrl.northumbria.ac.uk/id/eprint/47625

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics