Interlimb asymmetries: the need for an individual approach to data analysis

Bishop, Chris ORCID logoORCID:, Lake, Jason, Loturco, Irineu, Papadopoulos, Konstantinos ORCID logoORCID:, Turner, Anthony N. ORCID logoORCID: and Read, Paul (2018) Interlimb asymmetries: the need for an individual approach to data analysis. Journal of Strength and Conditioning Research . ISSN 1064-8011 [Article] (Published online first) (doi:10.1519/JSC.0000000000002729)

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It has been shown that the magnitude of inter-limb asymmetries varies depending on the test selected; however, literature relating to whether asymmetries always favour the same limb is scarce. The aim of the present study was to determine whether inter-limb asymmetries always favoured the same side for common metrics across unilateral strength and jumping-based tests. Twenty-eight recreational sport athletes performed unilateral isometric squats, single leg countermovement jumps (SLCMJ) and single leg broad jumps (SLBJ) with asymmetries in peak force compared across all tests, and eccentric and concentric impulse asymmetries compared between jumps. Mean asymmetries for all tests were low (≤ -5.3%) and all inter-limb differences for jump tests favoured the left limb, whilst asymmetries during the isometric squat favoured the right limb. Despite the low mean asymmetry values, individual data highlighted substantially greater differences. Levels of agreement for asymmetries were computed via the Kappa coefficient and ranged from slight to substantial (< 0.01 – 0.79), although concentric impulse asymmetries for jump tests was the only comparison to result in substantial levels of agreement. With asymmetries rarely being present on the same side across tests, these results show that a more individual approach to reporting asymmetries is required, which should help practitioners when designing targeted training interventions for their reduction.

Item Type: Article
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 25397
Notes on copyright: This is a non-final version of an article published in final form in:
Bishop, C, Lake, J, Loturco, I, Papadopoulos, K, Turner, A, and Read, P. Interlimb asymmetries: the need for an individual approach to data analysis. J Strength Cond Res XX(X): 000–000, 2018. Available at:
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Depositing User: Chris Bishop
Date Deposited: 15 Oct 2018 16:15
Last Modified: 29 Nov 2022 19:50

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