The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults

Daniel J Glassbrook; Joel T Fuller; Jacqueline Alderson; Jodie A. Wills; Tim Doyle

The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults

Daniel J Glassbrook, Joel T Fuller, Jacqueline Alderson, Jodie A. Wills, Tim Doyle

UWA Law School

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

Abstract

There are several methods for calculating inter-limb symmetry, an inter-limb difference ≥15% has been suggested as an indicator of sporting injury risk. The purpose of this study was to compare three common methods for determining symmetry: the Symmetry Index (percentage difference; SI) when referenced to the left limb (SILeft) or the average of both limbs (SIAverage), and the Symmetry Angle (vector difference; SA). 15 recreationally active participants completed a sprint protocol on a non-motorised treadmill. Accelerometers were positioned on both tibias to measure peak resultant acceleration (PRA). The SA identified less clinically relevant PRA inter-limb asymmetries than the SI in healthy adults. Once an appropriate level of asymmetry as measured by the SA is determined, this may help to more correctly identify asymmetry in athletes and patients than the SI.

Original language	English
Title of host publication	ISBS Conference 2018
Place of Publication	USA
Publisher	International Society of Biomechanics in Sports
Pages	622-625
Volume	36
Edition	1
Publication status	Published - 14 Sept 2018
Event	36th Conference of the International Society of Biomechanics in Sports - Auckland, New Zealand Duration: 10 Sept 2018 → 14 Sept 2018 Conference number: XXVI

Publication series

Name	ISBS Proceedings Archive

Conference

Conference	36th Conference of the International Society of Biomechanics in Sports
Country/Territory	New Zealand
City	Auckland
Period	10/09/18 → 14/09/18

Access to Document

https://commons.nmu.edu/isbs/vol36/iss1/141/

Cite this

Glassbrook, D. J., Fuller, J. T., Alderson, J., Wills, J. A., & Doyle, T. (2018). The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults. In ISBS Conference 2018 (1 ed., Vol. 36, pp. 622-625). (ISBS Proceedings Archive). International Society of Biomechanics in Sports. https://commons.nmu.edu/isbs/vol36/iss1/141/

@inproceedings{5666dec777b04bd88d0ea58d764d37c6,

title = "The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults",

abstract = "There are several methods for calculating inter-limb symmetry, an inter-limb difference ≥15% has been suggested as an indicator of sporting injury risk. The purpose of this study was to compare three common methods for determining symmetry: the Symmetry Index (percentage difference; SI) when referenced to the left limb (SILeft) or the average of both limbs (SIAverage), and the Symmetry Angle (vector difference; SA). 15 recreationally active participants completed a sprint protocol on a non-motorised treadmill. Accelerometers were positioned on both tibias to measure peak resultant acceleration (PRA). The SA identified less clinically relevant PRA inter-limb asymmetries than the SI in healthy adults. Once an appropriate level of asymmetry as measured by the SA is determined, this may help to more correctly identify asymmetry in athletes and patients than the SI.",

author = "Glassbrook, {Daniel J} and Fuller, {Joel T} and Jacqueline Alderson and Wills, {Jodie A.} and Tim Doyle",

year = "2018",

month = sep,

day = "14",

language = "English",

volume = "36",

series = "ISBS Proceedings Archive",

publisher = "International Society of Biomechanics in Sports",

pages = "622--625",

booktitle = "ISBS Conference 2018",

edition = "1",

note = "36th Conference of the International Society of Biomechanics in Sports ; Conference date: 10-09-2018 Through 14-09-2018",

}

Glassbrook, DJ, Fuller, JT, Alderson, J, Wills, JA & Doyle, T 2018, The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults. in ISBS Conference 2018. 1 edn, vol. 36, ISBS Proceedings Archive, International Society of Biomechanics in Sports, USA, pp. 622-625, 36th Conference of the International Society of Biomechanics in Sports, Auckland, New Zealand, 10/09/18. <https://commons.nmu.edu/isbs/vol36/iss1/141/>

The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults. / Glassbrook, Daniel J; Fuller, Joel T; Alderson, Jacqueline et al.
ISBS Conference 2018. Vol. 36 1. ed. USA: International Society of Biomechanics in Sports, 2018. p. 622-625 (ISBS Proceedings Archive).

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

TY - GEN

T1 - The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults

AU - Glassbrook, Daniel J

AU - Fuller, Joel T

AU - Alderson, Jacqueline

AU - Wills, Jodie A.

AU - Doyle, Tim

N1 - Conference code: XXVI

PY - 2018/9/14

Y1 - 2018/9/14

N2 - There are several methods for calculating inter-limb symmetry, an inter-limb difference ≥15% has been suggested as an indicator of sporting injury risk. The purpose of this study was to compare three common methods for determining symmetry: the Symmetry Index (percentage difference; SI) when referenced to the left limb (SILeft) or the average of both limbs (SIAverage), and the Symmetry Angle (vector difference; SA). 15 recreationally active participants completed a sprint protocol on a non-motorised treadmill. Accelerometers were positioned on both tibias to measure peak resultant acceleration (PRA). The SA identified less clinically relevant PRA inter-limb asymmetries than the SI in healthy adults. Once an appropriate level of asymmetry as measured by the SA is determined, this may help to more correctly identify asymmetry in athletes and patients than the SI.

AB - There are several methods for calculating inter-limb symmetry, an inter-limb difference ≥15% has been suggested as an indicator of sporting injury risk. The purpose of this study was to compare three common methods for determining symmetry: the Symmetry Index (percentage difference; SI) when referenced to the left limb (SILeft) or the average of both limbs (SIAverage), and the Symmetry Angle (vector difference; SA). 15 recreationally active participants completed a sprint protocol on a non-motorised treadmill. Accelerometers were positioned on both tibias to measure peak resultant acceleration (PRA). The SA identified less clinically relevant PRA inter-limb asymmetries than the SI in healthy adults. Once an appropriate level of asymmetry as measured by the SA is determined, this may help to more correctly identify asymmetry in athletes and patients than the SI.

M3 - Conference paper

VL - 36

T3 - ISBS Proceedings Archive

SP - 622

EP - 625

BT - ISBS Conference 2018

PB - International Society of Biomechanics in Sports

CY - USA

T2 - 36th Conference of the International Society of Biomechanics in Sports

Y2 - 10 September 2018 through 14 September 2018

ER -

The symmetry angle identifies less clinically relevant inter-limb asymmetries than the symmetry index in healthy adults

Abstract

Publication series

Conference

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Cite this