What is IT band syndrome?
Iliotibial band syndrome (ITBS) is one of the most common overuse injuries in runners and cyclists. The iliotibial band - commonly called the IT band - is a thick band of connective tissue that runs along the outside of the thigh from the hip to just below the knee, where it attaches to the tibia.
ITBS occurs when the IT band becomes irritated as it repeatedly rubs over a bony prominence on the outer femur (the lateral femoral epicondyle) during the flexion and extension of the knee. This friction leads to inflammation and sharp lateral knee pain that is characteristically absent at the start of a run, begins around the same distance each time (the "trigger point"), and eventually becomes too painful to continue.
Despite being described as an IT band "friction" syndrome, current research suggests the mechanism is actually compression of a fat pad beneath the IT band rather than surface friction. The distinction matters less than the treatment: the root cause is almost always weakness in the hip abductors (glutes), which allows the knee to drop inward and increases IT band tension during loading.
Understanding IT band syndrome
Causes and contributing factors
- Weak hip abductors - particularly the gluteus medius - allowing excessive knee valgus (drop) during running
- High running volume, particularly on roads with cambers or trails with frequent descents
- A sudden increase in mileage without adequate conditioning
- Running in worn shoes or shoes without adequate lateral support
- Excessive downhill running or cycling, both of which increase IT band loading
- A history of tight hip flexors and TFL (tensor fasciae latae) muscle, which increases IT band tension
Symptoms to recognise
- Sharp or burning pain on the outside of the knee, typically 2-3 cm above the joint line
- Pain that begins predictably at a specific distance into a run, rather than from the start
- Pain that resolves quickly with rest but returns immediately when running resumes
- Tenderness when pressing directly over the lateral femoral epicondyle
- Pain that is worse running downhill and at slower paces (where knee flexion angle at foot strike is higher)
How Bearhug helps
The Bearhug knee support provides compression to the lateral knee structures, keeping the area warm and improving circulation to the irritated tissue around the IT band insertion. Warmth relaxes the lateral musculature and reduces the stiffness that drives early-session IT band pain. Improved proprioception from compression also helps the knee track more accurately during running, reducing the valgus drop that aggravates the condition.
The Bearhug thigh support provides targeted compression to the IT band and the TFL muscle higher up the leg, helping manage the tissue tension that feeds the problem at the knee. Used together, the knee and thigh sleeves address the IT band across its entire length rather than just at the pain site.
Alongside compression, the single most effective treatment for ITBS is glute strengthening. Lateral band walks, clamshells, and single-leg squats address the hip abductor weakness that is the underlying driver in the vast majority of cases. Reducing weekly mileage temporarily and avoiding downhill running gives the tissue time to settle while the strength work takes effect.
The information on this page is provided for general guidance only and does not constitute medical advice. If you are experiencing pain or injury, please consult a qualified healthcare professional for a proper diagnosis and treatment plan. Bearhug products are Class 1 medical devices designed to support - not replace - medical treatment.