RecruitingBehavioural interventionGraded Exposure and Mindfulness Meditation for Patients Post-ACL ReconstructionTo evaluate the effect of graded exposure and mindfulness meditation after ACLR, the investigators will determine the effect of graded exposure and mindfulness meditation to 1) decrease self-reported injury-related fear and reinjury anxiety, and 2) improve lower extremity reaction time when compared to a waitlist control group.