Psychological and Physiological Parameters for Return-to-sport After ACL Reconstruction

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 Pro™, 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 Pro™ in test subjects following ACL reconstruction?

NCT Number	NCT07259083
Lead Sponsor	Johannes Kepler University of Linz Collaborators: University of Salzburg
Conditions	ACL Reconstruction
Enrollment	30 participants
Start Date	2025-04-16
Primary Completion	2025-09-01 (estimated)
Study Completion	2025-12-30 (estimated)
Updated on ClinicalTrials.gov	2026-04-20