Lower knee flexion and hip extension rate of torque development in athletes with previous hamstring strain injury

Robert Buhmann; Gabriel S Trajano; Graham Kerr; Anthony J Shield

doi:10.1080/02640414.2021.2003981

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Lower knee flexion and hip extension rate of torque development in athletes with previous hamstring strain injury

Journal article

Peer reviewed

Lower knee flexion and hip extension rate of torque development in athletes with previous hamstring strain injury

Robert Buhmann, Gabriel S Trajano, Graham Kerr and Anthony J Shield

Journal of Sports Sciences, Vol.40(5), pp.534-541

2022

DOI: https://doi.org/10.1080/02640414.2021.2003981

PMID: 34787048

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Abstract

Injury prevention

hamstrings

strain injury

neuromuscular inhibition

isokinetic dynamometry

Persistent deficits in strength and voluntary activation have been observed in athletes with a history of hamstring strain injury. The mechanisms contributing to these deficits are poorly understood and consequently may not be appropriately addressed during rehabilitation. This study aimed to investigate the impact of intended knee flexor contraction mode (concentric, eccentric or isometric) on the rate of torque development and surface electromyography (sEMG) rise in athletes with and without a history of unilateral hamstring strain injury. The impact of the previous injury on hip extensor rate of torque development was also investigated. Previously injured limbs exhibited a slower rate of torque development (mean difference = −31%, p = 0.02, Cohen’s d = 0.62) and biceps femoris rate of sEMG rise (mean difference = −181% · s−1, p = 0.003, Cohen’s d = 1.10) during intended eccentric knee flexor contractions compared with control limbs. Previously injured (mean difference = −29%, p = 0.01, Cohen’s d = 0.85) and contralateral uninjured limbs (mean difference = −31%, p = 0.007, Cohen’s d = 0.73) exhibited a slower rate of torque development during isometric hip extensor contractions compared with control limbs. These findings may highlight lower levels of descending input to hamstring motoneurons in previously injured athletes.

Details

Title: Lower knee flexion and hip extension rate of torque development in athletes with previous hamstring strain injury
Authors: Robert Buhmann (Author) - University of the Sunshine Coast, Queensland, School of Health and Behavioural Sciences - Legacy
Gabriel S Trajano (Author) - Queensland University of Technology
Graham Kerr (Author) - Queensland University of Technology
Anthony J Shield (Author) - Queensland University of Technology
Publication details: Journal of Sports Sciences, Vol.40(5), pp.534-541
Publisher: Routledge
Date published: 2022
DOI: 10.1080/02640414.2021.2003981
ISSN: 1466-447X
PMID: 34787048
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health - Sports & Exercise Science; School of Health and Behavioural Sciences - Legacy
Language: English
Record Identifier: 99584807202621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Sport Sciences