Quantifying the hip-ankle synergy in short-term maximal cycling

BURNIE, L., BARRATT, P., DAVIDS, Keith, WORSFOLD, P. and WHEAT, Jonathan (2022). Quantifying the hip-ankle synergy in short-term maximal cycling. Journal of Biomechanics, 142, p. 111268.

[img] PDF
Davids-QuantifyingHip-ankle(AM).pdf - Accepted Version
Restricted to Repository staff only until 27 August 2023.
Creative Commons Attribution Non-commercial No Derivatives.

Download (384kB)
Official URL: https://www.sciencedirect.com/science/article/pii/...
Link to published version:: https://doi.org/10.1016/j.jbiomech.2022.111268
Related URLs:

    Abstract

    Simulation studies have demonstrated that the hip and ankle joints form a task-specific synergy during the downstroke in maximal cycling to enable the power produced by the hip extensor muscles to be transferred to the crank. The existence of the hip-ankle synergy has not been investigated experimentally. Therefore, we sought to apply a modified vector coding technique to quantify the strength of the hip-ankle moment synergy in the downstroke during short-term maximal cycling at a pedalling rate of 135 rpm. Twelve track sprint cyclists performed 3 × 4 s seated sprints at 135 rpm, interspersed with 2 × 4 s seated sprints at 60 rpm on an isokinetic ergometer. Data from the 60 rpm sprints were not analysed in this study. Joint moments were calculated via inverse dynamics, using pedal forces and limb kinematics. The hip-ankle moment synergy was quantified using a modified vector coding method. Results showed, for 28.8% of the downstroke the hip and ankle moments were in-phase, demonstrating the hip and ankle joints tend to work in synergy in the downstroke, providing some support findings from simulation studies of cycling. At a pedalling rate of 135 rpm the hip-phase was most frequent (42.5%) significantly differing from the in- (P = 0.044), anti- (P < 0.001), and ankle-phases (P = 0.004), demonstrating hip-dominant action. We believe this method shows promise to answer research questions on the relative strength of the hip-ankle synergy between different cycling conditions (e.g., power output and pedalling rates).

    Item Type: Article
    Uncontrolled Keywords: Joint moments; Movement coordination; Sprint cycling; Vector coding; Ankle; Ankle Joint; Bicycling; Biomechanical Phenomena; Ergometry; Hip Joint; Knee Joint; Ankle; Ankle Joint; Hip Joint; Knee Joint; Ergometry; Bicycling; Biomechanical Phenomena; 0903 Biomedical Engineering; 0913 Mechanical Engineering; 1106 Human Movement and Sports Sciences; Biomedical Engineering
    Identification Number: https://doi.org/10.1016/j.jbiomech.2022.111268
    Page Range: p. 111268
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 15 Sep 2022 10:17
    Last Modified: 15 Sep 2022 10:17
    URI: http://shura.shu.ac.uk/id/eprint/30710

    Actions (login required)

    View Item View Item

    Downloads

    Downloads per month over past year

    View more statistics