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The Iliotibial band (ITB) is a tendon that runs along the outside of the leg, connecting from the top of the pelvic bone to just below the knee. The ITB is made up of mostly collagen fibres, with a small amount of elastin fibres allowing it to be slightly elastic and pliable. IT band syndrome (ITBS) is a common overuse injury, causing pain on the outside of the knee, which increases with exercise. ITBS occurs when the ITB becomes swollen and irritated from rubbing against the hip or knee bones.
| Characteristics | Values |
|---|---|
| Composition | Collagen fibres, elastin fibres, tendon |
| Functions | Pelvic stabilisation, posture control |
| Anatomy | Connects from the top of the pelvic bone to just below the knee |
| Symptoms | Pain, grating sounds, swelling |
| Causes | Friction, inflammation, overuse |
| Treatment | Rest, physical therapy, medication, surgery |
| Prevention | Flexibility exercises, strength training, correcting training errors |
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Iliotibial Band Syndrome (ITBS)
ITBS is caused by the overuse of the connective tissues on the outer thigh and knee, which results in excessive irritation and pain at the lateral part of the knee. This pain can be sharp and initially starts after exercise, but over time it can become constant, even at rest. The pain may also extend beyond the knee to the hip or leg. ITBS can cause a lack of stability and a loss of range of motion in the affected knee(s).
Those with ITBS may experience grating sounds or a grating feeling (crepitus) when the knee or hip moves, pain in one or both hips, and pain in one or both knees. The pain increases the longer the patient exercises and is worse when going downhill.
ITBS is typically treated through physical therapy and a temporary change in activities. About 50 to 90% of people with ITBS improve after about four to eight weeks of nonsurgical treatment. Surgery is rare and only recommended if other treatments do not work.
To reduce the risk of ITBS, it is recommended to avoid running on slanted surfaces, ensure a proper warm-up and cool-down, and wear supportive shoes.
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ITB Anatomy
The iliotibial band (ITB) is a tendon, a thick band of flexible fascia, that runs along the outside of the leg from the hip to just below the knee. The ITB is made up of collagen fibres, the strongest protein found in nature, which are aligned vertically to allow for better force absorption during weight-bearing activities. There are also small amounts of elastin fibres among the collagen, giving the ITB some elasticity and pliability.
The ITB is formed proximally at the hip by the fascia of the gluteus maximus, gluteus medius, and tensor fasciae latae muscles. It serves an important function in lower extremity motion, as well as pelvic stabilisation and posture control. The ITB shares the innervation of the TFL and gluteus maximus via the superior and inferior gluteal nerves.
ITB syndrome, a common overuse injury, occurs when the ITB becomes irritated or swollen from rubbing against the hip or knee bones. This friction is caused by the repeated bending and straightening of the knee during activities like running and cycling. ITB syndrome causes sharp pain that worsens with exercise and can lead to patellofemoral pain syndrome (PFPS).
Treatment for ITB syndrome typically involves rest, physical therapy, and medication. Surgery is rarely needed, but may be recommended if other treatments are ineffective. To prevent ITB syndrome, athletes can address risk factors such as improper running form and poor bike fit, and incorporate flexibility and strength training into their routines.
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ITBS Causes
Iliotibial band syndrome (ITBS) is a medical condition that causes pain on the outside of the knee. It is caused by the iliotibial band, a thick band of fascia, getting irritated or swollen from rubbing against the hip or knee bones. The iliotibial band is made up of mostly collagen fibres, which are aligned vertically to better absorb force during weight-bearing activities. However, the lack of elastin fibres means it does not have the ability to stretch like a muscle.
ITBS is a common overuse injury, often seen in runners, especially long-distance runners, and cyclists. Other athletes who are prone to ITBS include basketball players, hockey players, and soccer players. ITBS accounts for about 12% of running injuries and is more common in females than males.
There are several factors that can increase the risk of developing ITBS. These include bowed legs, having one leg that is longer than the other, knee arthritis, rotating the ankle, leg or foot inward when moving, and weakness in the hip, butt, or abdominal muscles. Additionally, decreased flexibility and muscle strength imbalances in the pelvis, hip, knee, foot, and ankle can lead to faulty movement patterns and increased strain on the IT band.
ITBS can also be caused by training on tilted surfaces, such as downhill running, which can lead to repetitive stress on the IT band. A sudden increase in training volume or intensity can also contribute to ITBS by increasing stress on the body and leading to faulty movement patterns.
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ITBS Symptoms
The iliotibial band (ITB) is a thick band of fascia formed proximally at the hip by the fascia of the gluteus maximus, gluteus medius, and tensor fasciae latae muscles. ITBS, or Iliotibial Band Syndrome, is where the iliotibial band gets irritated or swollen from rubbing against hip or knee bones. It is considered a non-traumatic overuse injury and is often concomitant with underlying weakness of hip abductor muscles.
ITBS is characterised by sharp pain in the hip or knee, which gets worse with exercise. The pain can be in one or both hips and knees. Other symptoms include grating sounds or a grating feeling (crepitus) when the knee or hip moves, pain over the greater trochanter in the hip, and pain at the lateral epicondyle in the knee. The pain is worse when going downhill and increases the longer one exercises.
ITBS is a common injury for athletes, especially runners, skiers, cyclists, and long-distance runners. It is also common in basketball, hockey, and soccer players. ITBS can also be caused by bowed legs, having one leg longer than the other, knee arthritis, rotating the ankle, leg, or foot inward when moving, and weakness in the hip, butt, or abdominal muscles.
ITBS is treatable, and with the help of healthcare providers, patients can recover from the syndrome. Treatment includes rest, physical therapy, and medication. Surgery is rarely required, but may be recommended if other treatments are ineffective.
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ITBS Treatment
The iliotibial band (ITB) is a thick band of fascia formed proximally at the hip by the fascia of the gluteus maximus, gluteus medius, and tensor fasciae latae muscles. ITBS, or iliotibial band syndrome, is a non-traumatic overuse injury that results in pain on the outside of the knee. It occurs when the iliotibial band rubs against the hip or knee bones, causing irritation and swelling. ITBS is common among athletes, particularly distance runners, but it can affect anyone.
Treatment for ITBS
Consult a healthcare provider: ITBS can be effectively diagnosed by a healthcare provider through a discussion of your exercise history and symptoms, followed by a physical examination. Be sure to describe your symptoms in detail, including the type of pain and any activities that trigger or worsen it. Your healthcare provider may perform specific tests, such as the Noble and Ober test, to confirm the diagnosis.
Rest and avoid aggravating activities: Initially, it is important to rest and avoid activities that aggravate your knee pain, such as running or other high-impact exercises. This gives your body time to heal and prevents further irritation of the iliotibial band.
Modify your activities: When you return to physical activities, make modifications to reduce the stress on your knees. For example, if you're a cyclist, consider lowering your bicycle seat. If you're a runner, focus on improving your running form, shortening your stride, and avoiding running on slanted surfaces or uphill/downhill routes.
Practice stretching and strengthening exercises: Work with a physical therapist to develop a routine that targets the muscles around your hips and knees. Stretching and strengthening these areas can help stabilize the joint and reduce the stress on your iliotibial band.
Consider surgery in severe cases: Surgery for ITBS is rare and typically only recommended if other treatments have failed to provide relief after several months. Surgical options may include procedures that remove or release the portion of the iliotibial band that moves over the femur.
Medications: Your healthcare provider may prescribe pain medications or anti-inflammatory drugs to help manage your symptoms during the healing process.
Proper conditioning and warm-up: When returning to physical activities, ensure you properly condition your body and incorporate warm-up routines that include stretching before engaging in more intense exercises.
With appropriate treatment and rest, most people with ITBS can expect significant improvement within four to eight weeks, and sometimes even sooner. It is important to seek treatment early and follow your healthcare provider's recommendations to prevent ITBS from worsening and to get back to your normal activities as soon as possible.
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Frequently asked questions
The iliotibial band (ITB) is a tendon or a long, fibrous band of flexible fascia that runs along the outside of the leg from the hip to just below the knee.
ITBS stands for iliotibial band syndrome, a common overuse injury that causes pain on the outside of the knee. It is caused by the ITB getting irritated or swollen from rubbing against the hip or knee bones.
The main symptom of ITBS is knee pain, which increases as a person runs, cycles or performs other exercises. The pain may also be felt in the hip.
ITBS is usually treated with rest, physical therapy and medication. Surgery may be recommended if other treatments are unsuccessful.
