I am delighted to talk with Dr Enda King on his recent paper published this year in the American Journal of Sport Medicine "Factors Influencing Return to Play and Second Anterior Cruciate Ligament Injury Rates in Level 1 Athletes After Primary Anterior Cruciate Ligament Reconstruction: 2-Year Follow-up on 1432 Reconstructions at a Single Center." This podcast links to my weekly research review and a full review and link to the paper are in that via the link at the bottom of the page notes. Enda is a chartered physiotherapist and former Gaelic footballer, who is Head of Performance at the Sports Surgery clinic and has just completed his PhD in the Biomechanics of ACL Rehabilitation with Dr Siobhan Strike at University of Roehampton, London and is in current great demand for the rehabilitation of elite athletes around the world using 3D biomechanics as a tool to guide that process. We discuss the paper, including challenges behind the data set, where this might go, the differences in outcome in Return to play and why that might be and the differences in re-injury rate between bone patellar bone and Hamstring grafts. You can follow Enda on twitter @Enda_King and our clinic @sscsportsmed @sscsantry I write a weekly 4 paper research review summary in sports medicine, science, and performance and you can subscribe at www.drandyfranklynmiller.com/review