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| Name | Class |
|---|---|
| University of Salzburg | OTHER |
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Injuries to the anterior cruciate ligament are common and are usually treated with reconstruction and subsequent rehabilitation. Many people succeed in return to sport (RTS), but not to the original level. Muscle strength factors can be assessed using isokinetic strength measurements, while the psychological readiness to return to sport can be assessed using the Anterior Cruciate Ligament-Return to Sport after Injury (ACL-RSI) questionnaire. In this study, isokinetic strength testing and psychological testing with the ACL-RSI questionnaire 1 to 4 years after ACL reconstruction will be assessed. The study will be conducted at the Institute of Physical Medicine & Rehabilitation at the Kepler University Hospital. The Biodex System Proâ„¢, a medical device for measuring and training muscle strength, will be used for the isokinetic measurements. The research question is as follows: Is there a correlation between the results of the ACL RSI questionnaire and the results of isokinetic strength testing on the Biodex System 4 Proâ„¢ in test subjects following ACL reconstruction?
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Participants after ACL reconstruction | 1 to 4 years after ACL reconstruction, age: 18 - 50 years, physically active |
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| Measure | Description | Time Frame |
|---|---|---|
| Peak torque (Nm) - Isokinetic dynamometry (Biodex System 4) | The isokinetic dynamometer measures concentric strength in extension and flexion. Isokinetic strength testing at a ROM (range of motion) of 0-90° knee flexion at 3 different speeds. Test protocol at angular velocities of 60°/sec, 180°/sec and 240°/sec. | Day 1 (1 to 4 years after ACL reconstruction) |
| ACL-RSI questionnaire (Anterior Cruciate Ligament-Return to Sport after Injury) | The ACL-RSI is a measure of psychological readiness to return to sport. It contains 12 questions and examines 3 components related to readiness to return to sport: emotions (5 questions), confidence in one's own performance (5 questions) and risk assessment (2 questions). The questions relate to the psychological effects of returning to sport. The respondents answer each question by giving their assessment in steps of ten on a Likert scale from 0 to 100 points. Low scores indicate a negative psychological assessment and high scores indicate a positive psychological assessment. The cut-off value for distinguishing between returnees and non-returnees is 51.3 points. A German version of the questionnaire is used. | Day 1 (1 to 4 years after ACL reconstruction) |
| Measure | Description | Time Frame |
|---|---|---|
| Isokinetic dynamometry (Biodex System 4) | The isokinetic dynamometer measures concentric strength in extension and flexion including following parameters: Average peak torque (Nm), time to peak torque (sec), angle of peak torque (deg), torque at 30°, torque at 0.18 seconds, max. repetitions to total work, work/body weight, total work, work first third, work last third, work fatique, avg. power, acceleration time (msec), ROM (range of motion, deg), agonist/antagonist ratio (%), hamstring/quadriceps (H/Q) ratio, LSI (limb symmetry index) Isokinetic strength testing at a ROM of 0-90° knee flexion at 3 different speeds. Test protocol at angular velocities of 60°/sec, 180°/sec and 240°/sec. |
| Measure | Description | Time Frame |
|---|---|---|
| Time since ACL surgery | Time in months since ACL surgery | Day 1 |
| Height | Height of the participant in cm | Day 1 |
Inclusion Criteria:
Exclusion Criteria:
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Physically active adults who underwent unilateral ACL reconstruction 1 to 4 years ago
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Kepler University Clinic, Dept. of Physical Medicine & Rehabilitation | Linz | 4021 | Austria |
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| ID | Term |
|---|---|
| D000070598 | Anterior Cruciate Ligament Injuries |
| ID | Term |
|---|---|
| D007718 | Knee Injuries |
| D007869 | Leg Injuries |
| D014947 | Wounds and Injuries |
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| Day 1 (1 to 4 years after ACL reconstruction) |
| Sports activity | Sports activity before and after surgery in minutes/week | Day 1 |
| Weight | Weight of the participant in kg | Day 1 |
| Body Mass Index | Relation of body weight to the square of body height | Day 1 (1 to 4 years after ACL reconstruction) |
| Age | Age of the participant in years | Day 1 |