IT band syndrome, also known as iliotibial band syndrome, is one of the most common injuries among runners. This debilitating inflammation can turn every stride into agony, sometimes forcing a complete stop mid-run. Yet with a solid understanding of the mechanics involved and a few technical adjustments, it is entirely preventable.
What is iliotibial band syndrome?
IT band syndrome is an inflammation of the Tensor Fasciae Latae (TFL). The tendon in question connects the outer side of the hip to the upper part of the tibia. During running, with each flexion and extension of the knee, this tendon slides back and forth over the lateral femoral condyle.
This back-and-forth motion resembles that of a windscreen wiper. If the friction becomes excessive, the tendon becomes irritated and a sharp pain appears on the outer side of the knee. This pain is often so intense that it stops the runner in their tracks after just a few kilometres, while remaining completely absent at rest or while walking.
The main triggers
The factors contributing to this inflammation are multiple and often stem from an accumulation of errors:
- Too rapid a progression: Increasing your weekly mileage too quickly is the number one cause. The body doesn't have enough time to adapt the resilience of its tendons to the new workload.
- Unsuitable or worn-out kit: Running in ill-fitting trail or running shoes alters your foot strike. A collapsed sole can accentuate internal knee rotation, increasing friction.
- Terrain: Overly flat and monotonous surfaces (tarmac) or, conversely, excessively steep descents stress the tendon repetitively at the same angle of flexion.
- Muscular weakness: A lack of strength in the hip stabiliser muscles (particularly the gluteus medius) causes the pelvis to tilt, placing the IT band under tension.
How to prevent IT band syndrome?
To prevent this injury from taking hold, prevention must become a priority in your training routine.
Work on your progression and technical approach Don't change everything overnight. If you're transitioning from a heel strike to a more natural footstrike, do it gradually. Also pay close attention to the drop of your shoes: a drastic change in heel height can alter tension throughout the entire posterior and lateral chain.
Never neglect stretching Stretching isn't just for recovery — it helps restore flexibility to the hip-glute-TFL complex. A flexible tendon will cause less friction than a stiff, contracted one. Make it a habit to incorporate specific running stretches to release tension in the lateral chain.
Hydration: fuel for your tendons A tendon is mostly made of water. Insufficient sports hydration makes tissues less supple and more prone to injury. Drink at least 1.5 litres of water a day, and more on training days. Conversely, alcohol increases acidity and promotes inflammation of the tendon sheaths.
Strengthen your stabilisers Incorporate lateral core exercises and glute strengthening work. The more stable your pelvis, the less your knee will be subject to unwanted "sweeping" movements, directly protecting your iliotibial band.
What to do when the pain has already set in?
If pain appears, don't push through it. Apply ice to the painful area for 15 minutes several times a day to reduce inflammation. During the rest phase, you can maintain your cardiovascular fitness with low-impact activities such as cycling or swimming. If the problem persists, consult a sports podiatrist to check whether orthopaedic soles are needed to correct your foot strike.
The self-test: is it really IT band syndrome?
To confirm that the issue is indeed IT band inflammation rather than a meniscal problem, you can perform the side-step test (or Noble test). Stand upright, bearing weight on the painful leg, and slowly flex the knee to approximately 30 degrees. It is precisely at this angle that the tendon rubs most forcefully against the bone. If a sharp, localised pain appears on the outer side of the knee at this point, a TFL diagnosis is very likely. This test is an excellent indicator for knowing when it's time to ease off before the inflammation becomes chronic.
