Residual deficits in reactive strength indicate incomplete restoration of athletic qualities following anterior cruciate ligament reconstruction in professional soccer players

Read, Paul, Davies, William T., Bishop, Chris ORCID logoORCID: https://orcid.org/0000-0002-1505-1287, Mc Auliffe, Sean, Wilson, Mathew G. and Turner, Anthony N. ORCID logoORCID: https://orcid.org/0000-0002-5121-432X (2020) Residual deficits in reactive strength indicate incomplete restoration of athletic qualities following anterior cruciate ligament reconstruction in professional soccer players. Journal of Athletic Training . ISSN 1062-6050 [Article] (Published online first) (doi:10.4085/169-20)

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Abstract

Context: Deficits in plyometric abilities are common following anterior cruciate ligament reconstruction (ACLR). Vertical rebound tasks may provide a targeted evaluation of knee function.

Objective: Examine the utility of a vertical hop test to assess function following ACLR and establish factors associated with performance.

Design: Cross-sectional

Setting: Rehabilitation

Participants: Soccer players with a history of ACLR (N = 73) and matched controls (N = 195)

Main outcome measures: 10 second vertical hop test including measures of jump height, reactive strength index (RSI) and asymmetry. We also examined possible predictors of hop performance including single leg vertical drop jump (SLDVJ), isokinetic knee extension strength, and the international knee documentation committee questionnaire.

Results: Significant between-limb differences were identified for the ACLR group only and asymmetry scores increased in those with a history of ACLR (P < 0.001) compared to controls. SLDVJ RSI and knee extension torque were significant predictors of 10 second hop
height (R2 = 20.1%) and RSI (R2 = 47.1%).

Conclusions: Vertical hop deficits are present following ACLR even after completing a comprehensive rehabilitation program. This may be due to reduced knee extension and reactive strength. Vertical hop tests warrant inclusion as part of return to sport test battery.

Item Type: Article
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 31372
Useful Links:
Depositing User: Chris Bishop
Date Deposited: 13 Nov 2020 18:45
Last Modified: 08 Jun 2022 11:23
URI: https://eprints.mdx.ac.uk/id/eprint/31372

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