Runner's Knee Isn't Just a Running Problem

Runner's Knee Isn't Just a Running Problem

Patellofemoral pain — pain around or behind the kneecap — is one of the most common musculoskeletal complaints in active people. It goes by several names: runner's knee, anterior knee pain, chondromalacia. The label matters less than the underlying picture, which is nearly always a load tolerance issue rather than a structural failure.¹

The kneecap sits in a groove at the end of the femur and glides through it during flexion and extension. When the compressive and shear forces through that joint exceed what the tissue can handle over a given period of time, pain follows. That's patellofemoral pain in its most straightforward form. It's not a sign that the knee is damaged — it's a signal that the loading demand has outpaced what the joint is currently adapted to absorb.

The Hip Connection Most People Miss

Here's what decades of biomechanics research have made clear: the knee is often just the messenger. The problem is frequently upstream. Weakness or poor motor control of the hip abductors and external rotators allows the femur to internally rotate and adduct during activities like running, squatting, and stair descent. This shifts the contact mechanics at the kneecap, increasing lateral pressure and compressive load on tissue that isn't positioned to handle it well.²

Research by Powers and others has documented strong associations between altered hip kinematics and patellofemoral pain, particularly the pattern of excessive dynamic knee valgus — where the knee caves inward during loading activities. Addressing this pattern means treating the hip, not just the knee.

The foot can also be a contributing factor. Excessive pronation affects the tibia's rotational mechanics, which in turn influences how forces travel to the kneecap. A thorough assessment looks at the full lower limb kinetic chain, not just the painful joint.

Why Rest Doesn't Solve It

A common pattern with patellofemoral pain: the person backs off activity, pain settles, they return to training — and it comes back. Rest reduced the load, but it didn't improve the tissue's capacity to handle that load. The underlying mechanics that drove the overload were never addressed.

Structured rehabilitation — specifically progressive hip and quadriceps strengthening, with graduated return to activity — consistently outperforms passive approaches in the research.¹ The 2016 international consensus on patellofemoral pain endorsed exercise therapy as the primary treatment modality, with particular emphasis on hip-targeted programming for people who show hip weakness or valgus movement patterns.¹

The Load Management Piece

How the load is reintroduced matters as much as what exercises are used. There are no bad activities for a patellofemoral joint — only too much too soon.³ Gabbett's work on training load demonstrates that rapid spikes in workload — a sudden increase in weekly mileage, returning to squats after a break, jumping back into a competitive sport season — are the consistent predictor of injury, not the activity itself.

In practice, this means the reloading process is deliberate: weekly volume increases are kept gradual, higher-demand movements (deep squats, running downhill, plyometrics) are introduced progressively, and the person's pain response is used as real-time feedback on whether the load is appropriate. A pain level of 0–3 out of 10 during exercise, returning to baseline within 24 hours, is a generally accepted marker of tolerable loading.¹

What Tends to Work

The evidence supports a combined approach: hip strengthening (particularly abductors and external rotators), quadriceps loading (starting with isometrics and progressing to squats and step work), and patient education about load management. Some people benefit from short-term taping or bracing to reduce pain during early rehabilitation, which allows them to exercise with less provocation while the hip and quad strength program builds capacity.⁴

Gait retraining — adjusting step rate or trunk lean during running — has also shown promising results for reducing patellofemoral load in runners specifically. It's a useful adjunct when the person's movement pattern is clearly contributing.

Surgery is rarely indicated. Arthroscopic procedures for patellofemoral pain without a clear structural lesion have not shown meaningful benefit over conservative care, and most guidelines recommend exhausting a well-designed rehabilitation program before any surgical discussion.

What This Looks Like in Practice

Patellofemoral pain is one of the more satisfying conditions to manage well, because it responds predictably to a well-executed plan. The key is identifying which parts of the kinetic chain are contributing — hip control, foot mechanics, training volume, quadriceps capacity — and building a program that addresses the actual drivers rather than just the symptomatic knee.

The team at Boreal Spine & Sport uses a lower-limb kinetic chain assessment to map out those contributing factors and build a graduated loading program specific to what the person is trying to get back to, whether that's recreational running, competitive sport, or pain-free stairs.

References

1. Crossley KM, Callaghan MJ, van Linschoten R. Patellofemoral pain. Br J Sports Med. 2016;50(4):214–215.
2. Powers CM. The influence of abnormal hip mechanics on knee injury: a biomechanical perspective. J Orthop Sports Phys Ther. 2010;40(2):42–51.
3. Gabbett TJ. The training-injury prevention paradox: should athletes be training smarter and harder? Br J Sports Med. 2016;50(5):273–280.
4. Barton CJ, Lack S, Hemmings S, Tufail S, Morrissey D. The 'Best Practice Guide to Conservative Management of Patellofemoral Pain': incorporating level 1 evidence with expert clinical reasoning. Br J Sports Med. 2015;49(14):923–934.