ITB Syndrome: Why Stretching Isn’t the Answer (And What Actually Works)

You’ve felt it before, or you know someone who has. That sharp, burning pain on the outside of your knee that starts creeping in around the 6 or 7km mark. It’s relentless, it’s predictable, and it has a habit of ending training runs before they’ve really begun.

ITB syndrome is one of the most common, and most mismanaged, running injuries I see in my Somerset West practice. Most runners who come to me have already tried the usual advice: foam rolling, stretching, and waiting it out. They’re still in pain. And there’s a good reason for that. The standard advice for ITB syndrome gets one very important thing wrong.

What is ITB syndrome?

The iliotibial band (ITB) is a thick band of connective tissue that runs along the outside of your thigh, from your hip down to just below your knee. It plays an important role in stabilising your leg as you run, but when it becomes irritated, it causes a friction-like pain on the outer knee that worsens with every stride.

It’s particularly common in recreational runners training in the 10K to half marathon range, especially those who have recently increased their mileage, started running on cambered roads, or added more hill work to their training.

The myth: stretch it out and it’ll go away

Here’s what most runners are told when they get an ITB flare-up: foam roll the outside of your thigh, stretch your IT band, and rest until it calms down. And yes, this sometimes provides short-term relief. The tightness eases, the pain settles, and you head back out onto the road.

Two weeks later, it’s back.

The reason stretching doesn’t fix ITB syndrome is that the IT band itself is not the problem. It’s the symptom. The IT band is connective tissue, it has very limited capacity to lengthen, so no amount of foam rolling or static stretching is going to change the underlying mechanics driving the irritation. That said, flexibility does play a role in ITB syndrome. Just not where most people focus. The flexibility piece — but not where you think While stretching the ITB itself is largely ineffective, tightness in the muscles around the hip absolutely can contribute to ITB problems, and this is something I’ve been seeing a lot of this year.

The tensor fasciae latae (TFL) is a muscle that sits at the front of your hip and attaches directly into the ITB. When the TFL is overactive or tight, which often happens in runners with limited hip rotation, it increases the tension running through the entire band. Add that to the load of running, and you have a recipe for irritation at the knee.

Poor hip mechanics and restricted hip rotation compound this further. When your hips don’t move freely through their full range, the body finds compensatory movement patterns, and those compensations often show up as increased strain on the ITB.

So flexibility matters, but the focus should be on releasing tightness in the TFL and improving hip mobility, not on trying to stretch a band that isn’t designed to stretch.

The real cause: it’s a strength issue at the root

Alongside these mobility factors, the most consistent underlying cause I find in runners with ITB syndrome is weakness in the hip abductors and glutes, specifically the gluteus medius. This muscle controls the inward movement of your knee as your foot hits the ground. When it’s weak or fatigued, your knee collapses inward slightly with each stride, increasing tension on the ITB and causing it to rub against the outside of the knee.

The longer you run, the more fatigued those muscles get, which is why ITB pain almost always starts at a predictable point in your run rather than from the very first kilometre.

Other contributing factors include:

Sudden increases in mileage. Too much, too soon is the fastest route to an ITB flare.

Running on cambered or banked surfaces. The tilt puts uneven stress through the outside of your leg.

A slow running cadence. A lower step rate increases ground contact time and load through the knee with each stride.

Muscle imbalances between the quads and hamstrings. These alter how your pelvis moves during running, indirectly affecting ITB tension.

What actually fixes ITB syndrome

The answer isn’t more stretching of the IT band. It’s a combination of addressing the right mobility restrictions, TFL tightness, hip rotation, alongside targeted strengthening of the glutes and hip stabilisers.

When a runner comes to see me in Somerset West with an ITB complaint, here’s how I approach it:

A movement assessment. I look at how you move, single leg squats, hip stability and mobility tests, and often a look at your running gait, to identify exactly where the breakdown is happening.

Hip mobility work. Where TFL tightness or restricted hip rotation is contributing, we address that directly, not by stretching the ITB, but by targeting the muscles and structures that are actually limiting movement.

Targeted hip and glute strengthening. Specific movements designed to address the exact weaknesses driving your ITB problem, progressed carefully to build real running-specific strength.

Load management. In most cases you don’t need to stop running entirely. We modify your training so your body can recover while you keep building fitness.

Running mechanics. Where relevant, small adjustments to cadence or foot strike can meaningfully reduce how much load the ITB absorbs with every kilometre.

How long does recovery take?

With the right approach, most runners see significant improvement within 4 to 6 weeks. The key phrase there is ‘the right approach’, if you continue to just foam roll and wait, you can be dealing with recurring ITB issues for months or even years.

The runners who recover quickest are the ones who address the root cause early, manage their load sensibly, and do the strengthening and mobility work consistently. It’s not complicated, but it does require doing the right things, not just the familiar ones.

If ITB syndrome is stopping you from running the way you want to, or you keep getting the same flare-up every time you push your mileage, it’s worth getting to the bottom of it properly. Book an assessment at my Somerset West practice and let’s find out what’s actually driving it.

Book your assessment at garymillerbio.co.za or call/WhatsApp 082 089 7248.