This case demonstrates the effectiveness of a rehabilitation product and protocol that incorporates manual therapy and unstable surface training. The purpose of this case study was to evaluate the effect of a four-week unstable training protocol using PRIMFIT product in conjunction with manual physical therapy on walking gait in a 17-year old, grade 3 ankle sprain with multiple ligament tears. A PRīMFIT™ protocol was designed and performed bi-weekly under supervision of a physical therapist and also bi-weekly by the patient independently. Patient’s walking gait was tested once a week using an OPTOGAIT System. The patient demonstrated significant clinical and statistical improvement in all gait and time parameters measured by OPTOGAIT system, as well as increased ankle mobility, decreased swelling and markedly decreased pain. For this patient, a combination of manual therapy techniques, PRīMFIT™ product and rehabilitation exercises were able to significantly improve and normalize walking gait in addition to eliminating swelling and pain. However, further research is needed with additional cases, especially those with similar or other injuries to develop the efficacy of the PRīMFIT™ product and protocol. To learn about this case study conducted PRīMFIT™ Solutions, view the PDF below.