Outer-knee pain during walking or running may be called iliotibial-band pain, but not every pain there has that cause. Arthritis, meniscal problems, and other tendons or ligaments can cause similar symptoms. Identify the painful location and triggering activity before choosing an IT-band exercise. A movement is more useful when its purpose matches the cause.
Watching the movements, reading.
This is how it moves.

It's a form roller that handles the surroundings gently.
He's holding his body with his arms and legs, adjusting the weight, moving his side thigh slowly. Do not press the sick knee directly outside.
원본 제작 자료의 동작 예시 화면 · Patient education and training materials (2022)
The iliotibial band is different from the cruciate ligaments
The iliotibial band is a thick strip from the lateral pelvis down the outer thigh to the knee. It differs in location and role from the cruciate ligaments inside the knee. Repeated running or cycling can irritate the outer knee. Review sudden increases in duration/distance and hills, and consider provoking activity and recovery together rather than one stretch alone.
1. Supine stretch for the outer thigh and buttock
Lie on your back, support the exercising thigh with both hands, and gently draw it diagonally across the body. Seek a mild stretch around the outer thigh and hip, without twisting the knee or pulling the foot far across. Excessive pelvic or back rotation may load the back instead. Breathe and release slowly; joint pain means reviewing direction and range.
2. Shift the pelvis gently toward a wall
Stand side-on with the exercising leg nearest a stable wall and use your hand for support. Cross that leg behind the other and gradually shift the pelvis toward the wall to feel the outer hip and thigh stretch. Avoid twisting or bending the trunk to make a bigger pose. If crossing the legs feels unstable or twists the knee, choose a supported lying alternative.
3. A foam roller is not for forceful pressure
For a foam roller, lie on your side supported by an elbow and the opposite leg, with the roller under the outer thigh. Use the supports to control pressure and move slowly from the outer hip along the thigh. This gently works surrounding tissues; it does not forcibly lengthen or break the band. Avoid pressing hard on the painful outer knee, and stop or change position if support is difficult or pain increases.
Check Hip Strength as Well as Flexibility
Hip muscles help control the leg when standing on one foot and walking. Exercises such as side-lying knee opening may therefore be included. Moving at the hip differs from rolling the whole pelvis and back to lift the leg. Choose exercises from actual movement and symptoms. Lots of stretching does not replace load adjustment and rebuilding strength.
What to Check before Returning to Your Usual Exercise
Temporarily reduce triggering activity while retaining comfortable movement. For running, record changes in distance, speed, and hills, then restart at a manageable level. Check pain afterwards and next day. Repeated swelling, locking, or giving way should not be dismissed as an IT-band problem. Brief relief after stretching is not proof the cause is resolved; review diagnosis and the exercise plan together.
Look beyond the Weekly Running Total
A 2025 observational study of 5,205 runners found higher overuse-injury rates after a single run increased substantially beyond the longest run in the preceding 30 days. It was not specific to IT-band pain, and 10% is not an individual safety boundary. Record recent longest distance, consecutive running days, and hills; assess repeated load, movement, and strength rather than relying only on rolling or stretching.