The IT Band (Iliotibial Band) is a thick fascia and tendon-like structure that runs down the side of the thigh. Pain on the lateral aspect of the knee (lateral femoral epicondyle) is common in sports involving endurance, both competitive and recreational. Often, this comes from the IT Band uncomfortably rubbing against the side of the thigh bone (femur). This may be due to altered running mechanics, weak hip abductors, muscular imbalance or muscular tension around the hips and knees. Some proactive measures in reducing the risk of lateral knee pain include: an adequate assessment of running mechanics, frequent updates to footwear, and proper training progressions.