Steps Towards Osteoarthritis Prevention

Inclusion Criteria: * Provision of signed and dated informed consent form * For children, signed and dated informed assent by child and parental permission form by parent/guardian to participate in the study * Underwent an anterior cruciate ligament reconstruction (ACLR) between 6-60 months prior to enrollment * Stated willingness to comply with all study procedures and lifestyle considerations and availability for the duration of the study * Completed all other formal physical therapy and therapeutic exercise regimens, and will not be engaging in any other formal therapy for their ACLR during the study * Physician clearance for unrestricted activity * Owning a smartphone * Demonstrate \< 8,000 steps per day during the screening phase of aim 2 as assessed using the Actigraph Link monitor Exclusion Criteria: * Underwent an ACLR revision surgery due to a previous anterior cruciate ligament (ACL) graft injury * A multiple ligament surgery was indicated with their ACL injury * A lower extremity fracture was suffered during the ACL injury * The participant has previously been diagnosed with any diseases that affect joints is present in either knee including knee osteoarthritis inflammatory arthritis * Pregnant or plans to become pregnant over next 4 months * Body mass index (BMI) ≥ 36 kg/m2 * Unable to speak English * Cochlear implant * Metal in body (metal fragments, shrapnel, permanent make-up, body piercings that cannot be removed) * Claustrophobia * History of seizures * Pa…