Assessing the magnitude and direction of asymmetry in unilateral jump and change of direction speed tasks in youth female team-sport athletes

Arboix-Alió, Jordi, Bishop, Chris ORCID logoORCID:, Benet, Ariadna, Buscà, Bernat, Aguilera-Castells, Joan and Fort-Vanmeerhaeghe, Azahara ORCID logoORCID: (2021) Assessing the magnitude and direction of asymmetry in unilateral jump and change of direction speed tasks in youth female team-sport athletes. Journal of Human Kinetics, 79 (1) . pp. 15-27. ISSN 1899-7562 [Article] (doi:10.2478/hukin-2021-0061)

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The direction of inter-limb asymmetries and the change of direction (COD) deficit are two aspects that have increased in recent years. The main objective of the present study was to assess the magnitude of neuromuscular asymmetries in an elite youth female team-sports sample and determine its directionality. Secondary objectives were to evaluate the relationship between COD deficit, linear speed and COD time performance. Elite female youth basketball and handball players (n = 33, age = 16 ± 1.17 y) performed the Single Leg Countermovement Jump in vertical (SLCJ-V), horizontal (SLCJ-H), and lateral (SLCJ-L) directions, the COD and the 10-m sprint. Results showed statistical differences between limbs in all the neuromuscular tests (p < 0.001). The Kappa coefficient showed poor to fair levels of agreement between tasks (K range = -0.087 to 0.233), indicating that asymmetries rarely favoured the same limb between skills. Additionally, small and non-significant correlations were found between the linear sprint capacity and the COD ability. The findings of the present study highlight the independent directionality of asymmetries across tests. The COD deficit does not appear to be much more advantageous than COD total time to measure asymmetry. Practitioners are encouraged to use a fitness testing battery to detect existing side differences and each ability should be specifically trained with functional tasks.

Item Type: Article
Keywords (uncontrolled): Physical Therapy, Sports Therapy and Rehabilitation, Physiology (medical)
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 33717
Notes on copyright: This journal provides immediate open access to its content under the Creative Commons BY NC ND 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the above-mentioned CC BY NC ND 4.0 license.
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Depositing User: Jisc Publications Router
Date Deposited: 12 Aug 2021 11:06
Last Modified: 02 Nov 2022 15:09

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