Norris, Richard 
ORCID: 0000-0002-1021-1042, Morrison, Scot, Price, Alan, Pulford, Sian, Meira, Erik, O'Neill, Seth, Williams, Huw, Maddox, Thomas W ORCID: 0000-0001-8636-5040, Carter, Paul and Oldershaw, Rachel A ORCID: 0000-0001-8478-599X
(2024)
Inline dynamometry provides reliable measurements of quadriceps strength in healthy and ACL-reconstructed individuals and is a valid substitute for isometric electromechanical dynamometry following ACL reconstruction.
The Knee, 46.
pp. 136-147.
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Abstract
<h4>Background</h4>Quadriceps strength testing is recommended to guide rehabilitation and mitigate the risk of second injury following anterior cruciate ligament (ACL) reconstruction. Hand-held dynamometry is a practical alternative to electromechanical dynamometry but demonstrates insufficient reliability and criterion validity in healthy and ACL-reconstructed participants respectively. The purpose of this study is to investigate the reliability and concurrent validity of inline dynamometry for measuring quadriceps strength. The hypotheses are that intra-class correlation coefficient (ICC) values will be >0.90 for reliability and concurrent validity.<h4>Methods</h4>This was a cross sectional study using a within-participant, repeated measures design. Isometric quadriceps testing was performed at 60° knee flexion in 50 healthy and 52 ACL-reconstructed participants. Interrater reliability, intrarater reliability, and concurrent validity of inline dynamometry was investigated through calculation of ICCs, Bland-Altman analysis, linear regression, standard error of measurement (SEM) and minimal detectable change (MDC).<h4>Results</h4>The lower bounds of the 95% confidence intervals were >0.90 for all reliability and validity ICCs in healthy and ACL-reconstructed participants, except for intrarater reliability in healthy participants using absolute scores (ICC = 0.936 [95% CI 0.890-0.963]). In ACL-reconstructed participants, Bland-Altman bias was 0.01 Nm/kg for absolute and average scores, limits of agreement were -11.74% to 12.59% for absolute scores, the SEM was 0.13Nm/kg (95% CI 0.10-0.17) and the MDC was 0.36Nm/kg (95% CI 0.28 - 0.47).<h4>Conclusion</h4>Inline dynamometry is a reliable and economical alternative to electromechanical dynamometry for the assessment of quadriceps strength following ACL-reconstruction.<h4>Clinical trial registration number</h4>ClinicalTrials.gov (NCT05109871).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Humans, Cross-Sectional Studies, Reproducibility of Results, Quadriceps Muscle, Muscle Strength, Anterior Cruciate Ligament Reconstruction, Anterior Cruciate Ligament Injuries |
| Divisions: | Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences Faculty of Health and Life Sciences > Institute of Infection, Veterinary and Ecological Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 02 Jan 2024 16:24 |
| Last Modified: | 24 Feb 2024 01:41 |
| DOI: | 10.1016/j.knee.2023.12.006 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3177688 |
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