IT Band Syndrome: Why the Pain Is in Your Knee But the Problem Probably Isn’t

If you’ve ever felt a sharp, burning pain on the outside of your knee during a run — one that fades quickly when you stop but comes back almost exactly at the same point every time you go out — there’s a good chance you’ve had a run-in with IT band syndrome.

It’s one of the most common overuse injuries among runners and cyclists in Winnipeg, especially as people ramp up their spring training after a long winter off. And while it tends to get blamed entirely on a “tight IT band,” the reality is a bit more interesting than that.

What the IT Band Actually Is

The iliotibial band is a thick strip of connective tissue — not a muscle — running from the outer hip all the way down to just below the knee. It doesn’t stretch much on its own, which has led to the long-standing assumption that “tightness” is the issue. But research has complicated that picture significantly.

A well-cited anatomical study by Fairclough and colleagues found that the IT band doesn’t actually slide back and forth over the lateral femoral condyle (the bony bump on the outside of your knee) the way it was traditionally thought to. Instead, the band compresses a layer of fat and connective tissue beneath it as the knee bends through a specific range — roughly 20–30 degrees of flexion — which is exactly the range your knee passes through repeatedly when running.¹ This compression, rather than friction, is now the more accepted explanation for the pain.

What that means practically: the problem isn’t just about how “tight” your IT band is. It’s about how much load that compression zone is handling, and whether your tissues have had time to adapt to it.

Where the Load Actually Comes From

IT band syndrome tends to get pinned on the knee, but the forces driving it usually originate elsewhere in the kinetic chain — particularly at the hip.

A prospective study by Noehren and colleagues tracked runners before and after developing IT band syndrome and found that those who developed the injury showed greater hip adduction during the stance phase of running (meaning the knee was drifting inward relative to the hip).² That movement pattern increases the compressive load on the lateral knee with every stride.

Hip abductor strength — particularly the gluteus medius — plays a central role here. When the hip doesn’t stabilize well during single-leg loading, the knee compensates, and the IT band pays the price over time. Step width matters too: narrower step width has been associated with greater IT band strain during running, meaning small gait-level changes can shift the load meaningfully.³

None of this means the knee is unimportant — it’s where the pain is felt, and local tissue sensitivity matters. But treating only the knee while ignoring how load is being distributed upstream tends to produce temporary relief rather than a durable solution.

Why It Tends to Come On in Spring

Manitoba winters push most people’s outdoor training to near zero. When the weather turns, there’s a natural urge to get back out and make up for lost time — which is exactly when IT band syndrome tends to appear.

Tim Gabbett’s influential work on the relationship between training load and injury risk provides a useful framework here. The key variable isn’t how much you’re doing in absolute terms — it’s the ratio of your current training load to what your tissues have been handling recently. When that ratio spikes (a sudden jump in weekly mileage after weeks of minimal activity), the risk of overuse injury rises sharply.⁴ As Gabbett himself put it, there are no bad exercises — only too much too soon.

IT band syndrome fits this pattern almost perfectly. It rarely shows up in week one of a new training block. It tends to appear 3–4 weeks in, once cumulative load has outpaced the tissue’s current tolerance.

What Actually Helps

Foam rolling the IT band has become almost reflexive for runners who feel lateral knee pain. It can provide temporary relief — and for some people that’s genuinely useful. But since the IT band itself isn’t the primary source of the problem, rolling it alone isn’t a complete strategy.

What the evidence points to more consistently:

• Load management. Reducing training volume temporarily — not stopping entirely, but pulling back enough to let tissue sensitivity settle — is often the most important first step. The goal is to find a load your tissues can tolerate, then build from there.
• Hip strengthening. Targeted work on hip abductor strength and single-leg stability has good support in the clinical literature and addresses one of the key upstream drivers of IT band loading.²
• Running gait assessment. In some cases, modest changes to step rate, step width, or trunk lean can meaningfully reduce lateral knee load without requiring large technique overhauls.³
• Graduated return to load. Once symptoms settle, reintroducing running progressively — rather than returning to full training the moment the pain is gone — is what separates a resolved injury from a recurring one.

Fredericson and Weir’s practical management review, which remains one of the more comprehensive clinical summaries on the topic, supports a phased rehabilitation approach that addresses both local symptoms and contributing biomechanical factors — rather than treating the knee in isolation.⁵

The Bigger Picture

IT band syndrome is often described as a stubborn, hard-to-treat injury — and it can be, if the approach focuses only on where it hurts rather than why the load accumulated there in the first place. When both pieces are addressed, most people make a full return to the activity they were doing.

If lateral knee pain has been a recurring theme in your training, or you’re trying to figure out how to manage it this spring, the team at Boreal Spine & Sport works with runners and active Winnipeggers on exactly these kinds of load and movement questions. A proper assessment can go a long way toward clarifying what’s actually driving the problem.

References

1. Fairclough J, Hayashi K, Toumi H, et al. The functional anatomy of the iliotibial band during flexion and extension of the knee: implications for understanding iliotibial band syndrome. J Anat. 2006;208(3):309–316.
2. Noehren B, Davis I, Hamill J. ASB clinical biomechanics award winner 2006: prospective study of the biomechanical factors associated with iliotibial band syndrome. Clin Biomech. 2007;22(9):951–956.
3. Meardon SA, Campbell S, Derrick TR. Step width alters iliotibial band strain during running. Sports Biomech. 2012;11(4):464–472.
4. Gabbett TJ. The training-injury prevention paradox: should athletes be training smarter and harder? Br J Sports Med. 2016;50(5):273–280.
5. Fredericson M, Weir A. Practical management of iliotibial band friction syndrome in runners. Clin J Sport Med. 2006;16(3):261–268.