Angle specific isokinetic metrics highlight strength training needs of elite youth soccer players

Eustace, Steven; Page, Richard; Greig, Matt

Angle specific isokinetic metrics highlight strength training needs of elite youth soccer players

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Eustace, Steven, Page, Richard and Greig, Matt (2020) Angle specific isokinetic metrics highlight strength training needs of elite youth soccer players. Journal of Strength and Conditioning Research, 34 (11). pp. 3258-3265. ISSN 1064-8011

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Abstract

The purpose of this study was to assess traditional and angle-specific isokinetic strength of eccentric knee flexors (eccKF) and concentric knee extensors (conKE) between senior professional and youth soccer players. 34 male soccer players (17 senior and 17 youth) were recruited for bilateral assessments at 180, 270 and 60°∙s-1. Peak torque (PT), dynamic control ratio (DCR), angle of peak torque (APT), functional range (FR), angle specific torque (AST) and angle specific DCR (DCRAST) were compared. EccKF and conKE PT (P = 0.782) and DCR (P = 0.508) were not different between groups across all angular velocities. Significant differences were identified for eccKF APT (P = 0.018) and FR (P = 0.006), DCRAST at 270°∙s-1 (P = 0.031) and in AST data recorded across angular velocities for eccKF and conKE (P = 0.003). Traditional strength measures were not sensitive to playing age, with implications for misinterpretation in training prescription. In contrast, AST data did differentiate between ages. Strength deficits which highlight the muscle contraction type, angular velocity and joint angle can be manipulated within an individualized training intervention. Given the relevance to injury aetiology, this study highlights potential implications for improved assessment strategies to inform training prescription for performance and injury prevention. Given the high number of injuries in adolescent soccer players, and in line with previous recommendations, practitioners should consider utilising more informed and specific strength and conditioning practices at younger ages.

Item Type:	Article
Identifier:	10.1519/JSC.0000000000002612
Keywords:	Age, hamstring, quadriceps, injury risk, screening
Subjects:	Medicine and health > Physiology
Depositing User:	Steven Eustace
Date Deposited:	28 Aug 2025 10:28
Last Modified:	29 Aug 2025 10:00
URI:	https://repository.uwl.ac.uk/id/eprint/14009

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Angle specific isokinetic metrics highlight strength training needs of elite youth soccer players

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