Inclusion Criteria:  Aged 18-30 with a unilateral ACL injury Sporting injury with a Tegner score of 7+ LSI for quadriceps strength <70% of the contralateral leg at 4 months post-up Both knees without a history of injury/prior surgery  Exclusion Criteria:  Ages smaller than 18 years old or greater than 30 years old Any concomitant bone fracture, major meniscus injury or full-thickness chondral injuries requiring altered rehabilitation program post-op Preoperative radiographic signs of arthritis Metal implants that would cause interference on MRI Non-HS graft for ACLR Patient non-compliance to the rehabilitation program Pregnancy or possibility of pregnancy