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Reliability and consistency of plantarflexor stretch-shortening cycle function using an adapted force sledge apparatus

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posted on 02.06.2017, 08:33 authored by Laura-Anne Furlong, Andrew J. Harrison
There are various limitations to existing methods of studying plantarflexor stretch-shortening cycle (SSC) function and muscle-tendon unit (MTU) mechanics, predominantly related to measurement validity and reliability. This study utilises an innovative adaptation to a force sledge which isolates the plantarflexors and ankle for analysis. The aim of this study was to determine the sledge loading protocol to be used, most appropriate method of data analysis and measurement reliability in a group of healthy, non-injured subjects. Twenty subjects (11 males, 9 females; age: 23.5 ±2.3 years; height: 1.73 ±0.08 m; mass: 74.2 ±11.3 kg) completed 11 impacts at five different loadings rated on a scale of perceived exertion from 1 to 5, where 5 is a loading that the subject could only complete the 11 impacts using the adapted sledge. Analysis of impacts 4 to 8 or 5 to 7 using loading 2 provided consistent results that were highly reliable (single ICC >0.85, average ICC >0.95) and replicated kinematics found in hopping and running. Results support use of an adapted force sledge apparatus as an ecologically valid, reliable method of investigating plantarflexor SSC function and MTU mechanics in a dynamic controlled environment.

Funding

The Irish Research Council for Science, Engineering and Technology provided funding to support this work.

History

School

  • Sport, Exercise and Health Sciences

Published in

Physiological Measurement

Volume

34

Issue

4

Pages

437 - 448

Citation

FURLONG, L-A. and HARRISON, A.J., 2013. Reliability and consistency of plantarflexor stretch-shortening cycle function using an adapted force sledge apparatus. Physiological Measurement, 34(4), pp. 437-448.

Publisher

© 2014 Institute of Physics and Engineering in Medicine . Published by IOP

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

This is an author-created, un-copyedited version of an article accepted for publication in Physiological Measurement. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0967-3334/34/4/437

ISSN

0967-3334

eISSN

1361-6579

Language

en