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Exploring limb symmetry index for balance across a range of functional tasks.

Gara, M. N., 2018. Exploring limb symmetry index for balance across a range of functional tasks. Masters Thesis (Masters). Bournemouth University.

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GARA, Michael Neil_M.Res_2018.pdf



Introduction: Body symmetry and functional reciprocity represent key components of normal movement (Lu & Chang 2012, Sadeghi et al 2000, Watkins 1999) making them essential components of clinical examination. To this end a limb symmetry index (LSI) of 80 – 90% of the unaffected limb has been proposed by previous authors (Daniel et al 1982, Barber et al 1990, Sapega 1990, Petschnig et al 1998). Whilst LSI has been reviewed for a large variety of potential variables, the LSI for balance remains largely unexplored. Balance is viewed as an integral part of maintaining everyday physical activity, a good quality of life and reducing health burden (Clark et al 2016). Therefore, this study aimed to determine the LSI for balance across a variety of functional tasks; whilst reviewing the use of novel yet clinically reproducible methodology. Method: A cross-sectional observational design was used. Seventeen participants (mean age 27.6±5.7 years) were recruited from the student population at Bournemouth University. Participants reported no existing injury or other balance affecting condition. Balance was measured using two devices: an instrumented wobbleboard (SMARTwobble, THETAmetrix, UK) and a sacral mounted accelerometer (Balance Sensor, THETAmetrix, UK). Participants completed a variety of tasks including forward, lateral and medial hop landing where sacral acceleration was measured for 1 second following landing. Task analysis was completed using SPSS v23, MatLab and Excel. Results: No statistically significant differences occurred between dominant and non-dominant limb for any of the assessed tasks. The absolute mean percentage difference between limbs was 4.9%±3.7% (95% CI 1.8% - 8.0%). ICC values ranged from 0.73 – 0.96 suggesting moderate to excellent test-retest reliability for accelerometry and wobbleboard. Discussion: The LSI for balance should be expected to be around 5% regardless of task. Sacral mounted accelerometry, represents a valid and reliable measurement device, for a variety of complex balance assessment tasks including hop landing. Instrumented wobbleboards may also provide a valid and reliable, clinically accessible method for measuring limb symmetry, but may not be appropriate for evaluating a variety of tasks.

Item Type:Thesis (Masters)
Additional Information:If you feel that this work infringes your copyright please contact the BURO Manager.
Uncontrolled Keywords:balance; limb symmetry; accelerometry; wobbleboard; hop landing
Group:Faculty of Health & Social Sciences
ID Code:31187
Deposited By: Symplectic RT2
Deposited On:31 Aug 2018 08:44
Last Modified:14 Mar 2022 14:12


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