The use of Hylan G-F 20 as a treatment of osteoarthritis (OA) of the knee has become popular in recent years. Typical treatment of OA of the knee includes NSAIDs and physical therapy protocols to strengthen local muscle groups and decrease pain. When these conservative treatment modalities have been exhausted, the next step is arthroplasty of the knee. Hylan G-F 20 treatments provide physicians with an intermediate mode of treatment prior to surgery. Hylan G-F 20 is a cross-linked, high molecular weight derivative of hyaluronan which can be found within the synovial capsule of the knee. This form of viscosupplementation is intended to reduce the pain suffered by those with OA by increasing the fluid levels within the synovial space, providing a cushion between the bony surfaces within the knee joint. Current studies have only looked at self-reported pain relief or Outcomes Inventories. This study aims to determine the ability of Hylan G-F 20 treatment to improve the parameters of gait of individuals who suffer from OA.