N/A
Completed N=102
Reliability and Validity of Inline Dynamometry Study for Measuring Knee Extensor Torque
Anterior Cruciate Ligament Injuries · Anterior Cruciate Ligament Rupture · Anterior Cruciate Ligament Tear
Source: ClinicalTrials.gov NCT05109871 ↗
Enrolled (actual)
102
Serious AEs
0.0%
Results posted
May 2025
Primary outcomePrimary: Peak Knee Extensor Torque Measured in Newton Metres Per kg (Nm/kg) — 3.12; 2.66 Newton metres per kg
Summary
This study will investigate the reliability and validity of an inline 'pull-type' dynamometer for measuring peak knee extensor torque. For the reliability study, healthy volunteers will be assessed by two assessors (inter-rater) at the index testing session, with testing repeated by one assessor one week later (test-retest). Validity will be investigated against isometric electromechanical dynamometry (gold standard) in patients following anterior cruciate ligament (ACL) reconstruction.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Peak Knee Extensor Torque Measured in Newton Metres Per kg (Nm/kg) |
3.12; 2.66 | — |
| SECONDARY Pain During Testing on a Numerical Rating Scale (0-10) |
1; 1 | — |
Eligibility Criteria
Inclusion Criteria
- Participant is willing and able to give informed consent for participation in the study.
- Male or Female, aged 18 years or above.
- No contraindications to maximal force testing (see exclusion criteria).
- For the ACL reconstruction participant cohort: diagnosed with ACL injury that was managed with ACL reconstruction surgery, with or without additional meniscal surgery. If medicated, stable dose of current regular medication for at least 4 weeks prior to study entry.
- For the healthy control participant cohort: no current or previous history of significant lower limb injury, or a history of previous minor injury that is symptomatic at the time of recruitment. No previous lower limb surgery. No course of medication, whether prescribed or over the counter, other than vitamins and mineral supplements or, for females, oral contraceptives.
Exclusion Criteria
- Unable to provide written consent to study participation, or there are contraindications to maximal force testing, including the following:
- History of chronic disease or disorder that may put the participants at risk because of participation in the study including non-united fractures, epilepsy, cardiac insufficiency, severe peripheral vascular disease, aneurysms, anticoagulant therapy, recent ( 3 months), pregnancy, neurological disorders (e.g., Parkinson's disease), skin conditions at point of force testing, severe osteoporosis, malignancy, rheumatoid arthritis.
- Conditions or symptoms that may influence the result of the study, or the participant's ability to participate in the study including pain, limited range of motion, knee effusion, or anaemia.
Data sourced from ClinicalTrials.gov (NCT05109871). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.