Commonly used clinical criteria following ACL reconstruction including time from surgery and isokinetic limb symmetry thresholds are not associated with between-limb loading deficits during running

Read, Paul J, McAuliffe, Sean and Thomson, Athol (2021) Commonly used clinical criteria following ACL reconstruction including time from surgery and isokinetic limb symmetry thresholds are not associated with between-limb loading deficits during running. Physical Therapy in Sport, 49. pp. 236-242. doi:10.1016/j.ptsp.2021.03.010

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Abstract

Objectives We included objective measures of gait and functional assessments to examine their associations in athletes who had recently commenced running after ACL reconstruction. Design Cross-sectional. Setting Sports medicine. Participants 65 male athletes with a history of ACL reconstruction. Main outcome measures Time from surgery, isokinetic knee extension/flexion strength (60°/s), and peak vertical ground reaction force (pVGRF) measured during running using an instrumented treadmill. We also investigated if a range of recommended isokinetic thresholds (e.g. > 70% quadriceps limb symmetry index) affected the magnitude of pVGRF asymmetry during running. Results There were significant relationships between quadriceps (r = 0.50) and hamstrings (r = 0.46) peak torque and pVGRF. Quadriceps peak torque explained a quarter of the variance in pVGRF (R2 = 0.24; p < 0.001). There was no association was between running pVGRF and time from surgery. Between-group differences in running pVGRF LSI% were trivial (d < 0.20) for all quadriceps and hamstring peak torque LSI thresholds. Conclusions Current clinical criteria including time from surgery and isokinetic strength limb symmetry thresholds were not associated with lower pVGRF asymmetry measured during running. Quadriceps strength is important, but ‘minimum symmetry thresholds’ should be used with caution.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: ACL; Running; Asymmetry
Subjects: Q Science > QP Physiology > QP301.H75 Physiology. Sport
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Health, Life Sciences, Sport and Wellbeing
Depositing User: Rhiannon Goodland
Date Deposited: 21 Apr 2021 12:08
Last Modified: 01 Aug 2021 22:21
URI: http://eprints.glos.ac.uk/id/eprint/9582

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