Loughborough University
Browse
Blenkinsop2016a.pdf (365.82 kB)

Evaluating feedback time delay during perturbed and unperturbed balance in handstand

Download (365.82 kB)
journal contribution
posted on 2020-11-24, 10:54 authored by Glen BlenkinsopGlen Blenkinsop, Matthew PainMatthew Pain, Michael HileyMichael Hiley
Feedback delays in balance are often assessed using muscle activity onset latencies in response to discrete perturbations. The purpose of the study was to calculate EMG latencies in perturbed handstand, and determine if delays are different to unperturbed handstand. Twelve national level gymnasts completed 12 perturbed and 10 unperturbed (five eyes open and five closed) handstands. Forearm EMG latencies during perturbed handstands were assessed against delay estimates calculated via: cross correlations of wrist torque and COM displacement, a proportional and derivative model of wrist torque and COM displacement and velocity (PD model), and a PD model incorporating a passive stiffness component (PS-PD model). Delays from the PD model (161 ± 14 ms) and PS-PD model (188 ± 14 ms) were in agreement with EMG latencies (165 ± 14 ms). Cross correlations of COM displacement and wrist torque provided unrealistically low estimates (5 ± 9 ms). Delays were significantly lower during perturbed (188 ± 14 ms) compared to unperturbed handstand (eyes open: 207 ± 12 ms; eyes closed: 220 ± 19 ms). Significant differences in delays and model parameters between perturbed and unperturbed handstand support the view that balance measures in perturbed testing should not be generalised to unperturbed balance.

History

School

  • Sport, Exercise and Health Sciences

Published in

Human Movement Science

Volume

48

Pages

112 - 120

Citation

BLENKINSOP, G., PAIN, M. and HILEY, M., 2016. Evaluating feedback time delay during perturbed and unperturbed balance in handstand. Human Movement Science, 48, pp.112-120.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Human Movement Science and the definitive published version is available at https://doi.org/10.1016/j.humov.2016.04.011

Acceptance date

2016-04-30

Publication date

2016-05-06

Copyright date

2016

ISSN

0167-9457

eISSN

1872-7646

Language

  • en

Usage metrics

    Loughborough Publications

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC