The influence of isokinetic trunk flexor and extensor strength on dynamic balance in children

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Eustace, Steven, Wdowski, Maximillian, Tallis, Jason and Duncan, Michael (2023) The influence of isokinetic trunk flexor and extensor strength on dynamic balance in children. Journal of Motor Learning and Development, 11 (2). pp. 323-337. ISSN 2325-3193

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Abstract

This study assessed if trunk flexor and extensor strength were predictors of time to stability (TTS) and centre of pressure (CoP) during hop and hold tasks in children. Seventeen boys (age; 10.1 ± 1.6 years; height, 1.45 ± 0.11 m; mass, 26.7 ± 7.83 kg) undertook isokinetic strength assessments of concentric and eccentric trunk flexors/extensors at 60°∙s-1, and anterior/medial hop tasks. Hierarchical multiple regressions determined if concentric and eccentric trunk flexor/extensor peak torques predict TTS using a composite score (CompX Compy Compz) and CoPX and CoPY. Concentric trunk flexors were the strongest predictor for TTS CompXY, with concentric flexion and eccentric extension predicting TTS CompY. All muscle actions were also strong predictors for CoPY during hop tasks. These findings have implications for the assessment of trunk musculature strength and measures of postural control within a young healthy population. The development of trunk musculature strength may aid improvements in dynamic balance tasks in children, with implications for fall and injury risk. To improve trunk musculature strength and the potential to maintain postural control, a combination of concentric and eccentric exercises with other training modalities appears relevant due to the increased relevance to the demands of balance maintenance.

Item Type:	Article
Identifier:	10.1123/jmld.2022-0078
Additional Information:	Accepted author manuscript version reprinted, by permission, from Journal of Motor Learning and Development, 2025, 11 (3): 323-337,https://doi.org/10.1123/jmld.2022-0078. © Human Kinetics, Inc.
Keywords:	Trunk strength, dynamic balance, hop and hold, time to stability, motor performance
Subjects:	Medicine and health
Depositing User:	Steven Eustace
Date Deposited:	26 Aug 2025 12:09
Last Modified:	26 Aug 2025 12:15
URI:	https://repository.uwl.ac.uk/id/eprint/14004

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The influence of isokinetic trunk flexor and extensor strength on dynamic balance in children

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