This study aims to utilize ultrasound imaging to investigate the effects of Nordic hamstring exercise on a post-surgical ACL rugby patient who had a hamstring tear in the contralateral leg of his ACL tear. The study will also examine any changes in the patient\u27s ACL leg hamstring compared to the torn hamstring leg. The patient\u27s Biodex test results will also be incorporated to determine if there is a correlation between muscle thickness and pennation angle changes. Ultrasound scans were taken 2 months, 4 months and will be taken again at 6 months post-surgery, following biodex assessments. Ultrasound images have shown an increase in muscle thickness and potential pennation angle changes in the ACL hamstring. While 6-month scans are still pending, the patient has demonstrated an increase in hamstring strength. As the athlete approaches the return-to-sport stage, they intend to continue performing Nordics due to their effectiveness in improving hamstring strength
