This clinical research focuses on the rehabilitation of a grade II anterior cruciate ligament (ACL) injury. The main objective of the project was to compare two specific therapeutic approaches in the management of this condition. The first evaluated device intervention is low-level laser therapy (LLLT). The second investigated intervention is the application of infrared therapy (IRT). Standard physiotherapy was also included in the study as an additional treatment component. The entire research project was sponsored by the educational institution Superior University. According to the official records, this clinical trial is currently completed.