Is absolute or relative knee flexor strength related to patient-reported outcomes in patients treated with ACL reconstruction with a hamstring tendon autograft? An analysis of eccentric Nordic hamstring strength and seated concentric isokinetic strength

•Relative knee flexor strength was not correlated to perceived knee function.•Absolute knee flexor strength relative to bodyweight had a weak correlation to PROs.•The variance in PROs were to only a small extent explained by hamstring strength. There is a need for better understanding of how knee fl...

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Published in:The knee 2023-03, Vol.41, p.161-170
Main Authors: Högberg, Johan, Piussi, Ramana, Simonson, Rebecca, Sundberg, Axel, Broman, Daniel, Samuelsson, Kristian, Thomeé, Roland, Hamrin Senorski, Eric
Format: Article
Language:English
Subjects:
Adolescent
Adult
Anterior cruciate ligament
Anterior Cruciate Ligament Injuries - surgery
Autografts
Female
Hamstring tendon autograft
Hamstring Tendons - transplantation
Humans
Idrottsvetenskap
injury
Isokinetic dynamometer
Knee
Knee Joint - surgery
Male
Muscle Strength
NordBord
Orthopedics
Reconstruction
Sport and Fitness Sciences
Sport Sciences
Surgery
Young Adult
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Summary:•Relative knee flexor strength was not correlated to perceived knee function.•Absolute knee flexor strength relative to bodyweight had a weak correlation to PROs.•The variance in PROs were to only a small extent explained by hamstring strength. There is a need for better understanding of how knee flexor strength influence patient-reported outcomes (PROs) after anterior cruciate ligament (ACL) reconstruction. Our aim was to investigate the relationship between the eccentric NordBord test and the seated concentric Biodex test with PROs, during the first year of rehabilitation after ACL reconstruction with hamstring tendon (HT) autograft. Patients with an index ACL reconstruction with an HT autograft participating in a rehabilitation registry were screened for inclusion. Outcomes of interest were the correlation between absolute (N/kg or Nm/kg) and relative (limb symmetry index) knee flexor strength measured in the NordBord and Biodex with the results of PROs. The significance level was set at p 
ISSN:0968-0160
1873-5800
DOI:10.1016/j.knee.2023.01.010