Iliotibial band syndrome (IT band syndrome or ITBS) is one of the most common causes of outer knee pain, especially in runners, cyclists, and active individuals. While the pain is often felt at the knee, the source of the problem usually involves the hip, thigh, and overall movement mechanics.
Understanding why IT band syndrome develops is key to resolving symptoms and preventing recurrence.
What Is the Iliotibial Band?
The iliotibial band is a thick band of connective tissue that runs along the outside of the thigh, extending from the hip to just below the knee. Its role is to help stabilize the knee and hip during activities such as walking, running, jumping, and changing direction.
IT band syndrome occurs when this tissue becomes irritated due to excessive tension, compression, or repetitive loading.
Common Causes
IT band syndrome is typically an overuse injury with several contributing factors.
Common causes include:
Repetitive bending and straightening of the knee, especially during running or cycling
Weakness or poor control at the hip and pelvis
Increased tension through the IT band due to muscle imbalances
Sudden increases in training volume or intensity
Altered foot or ankle mechanics that affect load distribution
Contrary to popular belief, IT band syndrome is not caused by a “tight” IT band alone. Stretching rarely addresses the root cause.
Common Symptoms
Symptoms of IT band syndrome often include:
Sharp or aching pain on the outside of the knee
Pain that worsens with activity, particularly running downhill or long distances
Discomfort during stair use or prolonged walking
Occasional clicking or snapping sensation near the knee
Pain that improves with rest but returns when activity resumes
In some cases, pain may also be felt at the outer hip.
How Physical Therapy Treats IT Band Syndrome
Physical therapy focuses on identifying and correcting the underlying factors contributing to irritation rather than simply treating symptoms.
A treatment plan may include:
Strengthening the hip and gluteal muscles to reduce strain on the IT band
Improving pelvic and lower-extremity control during movement
Addressing running, walking, or cycling mechanics
Manual therapy to improve tissue mobility and reduce irritation
Gradual return-to-activity programming to prevent flare-ups
By improving strength, coordination, and load management, physical therapy helps resolve pain and reduce the risk of recurrence.
When to Seek Help
If outer knee pain persists for more than a few weeks, worsens with activity, or limits your ability to train or move comfortably, physical therapy can help identify the cause and guide recovery.
At Breathe In Motion Physical Therapy & Wellness, our therapists specialize in treating IT band syndrome with individualized, one-on-one care. Our goal is to help you return to running, training, and daily activities with confidence and less pain
