The goal of this randomized clinical trial is to evaluate the effects of vibration on factors related to the risks of post-traumatic knee osteoarthritis and secondary anterior cruciate ligament (ACL) injury in individuals who have undergone anterior cruciate ligament reconstruction surgery (ACLR). The main objectives are to compare the effects of Standard rehabilitation vs. rehabilitation that includes whole body vibration (WBV) or local muscle vibration (LMV) on: * Quadriceps muscle function * Gait biomechanics linked to post-traumatic knee osteoarthritis development * Patient self-report outcomes * MRI indicators of knee joint health and muscle quality * Landing biomechanics linked to secondary ACL injury risk * Evidence-based return-to-physical-activity criteria Participants will be assigned to 1 of 3 groups (standard rehabilitation, standard rehabilitation + WBV, or standard rehabilitation + LMV) and will complete assessments of quadriceps function, gait biomechanics, landing biomechanics, functional ability, patient-report outcomes, and MRI 1, 6, and 12 months after ACLR. Researchers will compare the groups to see if vibration embedded in ACLR rehabilitation improves joint health outcomes.
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Quadriceps Isometric Peak Torque Limb Symmetry Index over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in peak internal knee extension moment during walking over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in vertical ground reaction force instantaneous loading rate over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in KOOS Knee-related Quality of Life Subscale over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in T1rho relaxation time (medial femoral condyle) over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Probability of attaining 90% single-leg hop symmetry at 12 months post-ACLR.
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in peak internal knee adduction moment during landing over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery
Change in quadriceps muscle quality over the first 12 months following ACL reconstruction surgery
Timeframe: Up to 12 months post ACL reconstruction surgery