Many individuals are inclined to think of knee pain as a knee problem, and hip pain as a hip problem. This is a natural assumption to make, since that is where you feel the pain, but the source of a lot of chronic lower limb pain is nothing to do with the joint that hurts and everything to do with the 60 centimetres below it.
Our musculoskeletal system does not work as individual parts. It works as a continuous mechanical chain, and the feet are the base of that chain. If the base is faulty, every segment above it will be forced to compensate. It is this compensation that is experienced as pain, and by the time it does, the knees, hips and lower back are usually badly affected.
How the body passes the problem upward
The underlying principle at work here is the kinetic chain. In simple terms, it refers to the link between the action of one joint and the action of the next. This principle is entrenched in our understanding that in the lower limb, function and malfunction are interlinked.
In practice, it just means that when you take a step and push off with your toes, your ankle, calf, and knee swing into action too. The effort at your hip is minimized, reducing overall energy usage. And because the hip generates less force, your lower back feels less stress as well.
It’s a beautiful domino effect of energy efficiency. But when something goes wrong with the first domino (the foot, in this case), the rest of the system has to work harder to keep the chain going. And sooner or later, some part of that chain will give way.
Overpronation and what it does to your knees
Overpronation occurs when the arch and ankle roll inwards upon weight-bearing. The heel inverts, the midfoot collapses, and the whole foot flattens under load. This isn’t just a foot shape issue – it creates a rotational force that is transmitted straight up the lower limb.
As the foot overpronates, the tibia (shin bone) spirals in. The femur follows. This tibial internal rotation alters the position of the patella – the knee cap – dragging it laterally off track from its groove in the femur. This places uneven force across the cartilage in back of the kneecap which, in almost every single case, is the mechanism of patellofemoral pain syndrome. Runners know it as Runner’s knee. It is not brought about via running. The running just highlights the fault that was already there.
The Q-angle measures the degree to which clinicians can quantify this. It is the angle formed between the pull of the quadriceps and the line of the patellar tendon. Overpronation boosts the Q-angle, exaggerating the lateral force on the patella and accelerating cartilage wear.
High arches, rigid feet, and hip deterioration
The issue is not unidirectional. Individuals with high arches – a condition known as oversupination or underpronation – face problems as their feet are excessively rigid. The arch doesn’t compress optimally while weight-bearing, resulting in the loss of the foot’s natural shock-absorbing capacity.
The lost shock must be transferred elsewhere. When the foot is inelastic and can’t absorb the shock, ground reaction force is channeled upwards with minimum dissipation. As a result, the knee is subjected to excessive force. The hip is subjected to even more force. The hip’s acetabulofemoral joint – i.e. the ball-and-socket structure of the hip – is subjected to repetitive impact loads that it simply cannot withstand at such magnitude.
Eventually, this leads to early osteoarthritis in the hip. The cartilage doesn’t wear off because of one blow, but due to a thousand mini-blows that are slightly more forceful than they should be, and which add up across months and years. The patient can’t recall a blow because there was no one blow: the damage was gradual and structural.
Pelvic tilt and the problem of asymmetry
The issue becomes more intricate when misalignment is one-sided. In this case, one foot pronates more than the other. This creates what clinicians call a functional leg length discrepancy because the collapsed arch lowers the overall height of the foot structure, effectively shortening that leg. A shorter leg means a tilted pelvis – the pelvis drops on the shorter side to allow the femur head to remain centered in the acetabular cavity.
Lowering the pelvis on the shorter side also increases tensile strain on the gluteus medius muscle on the same side as the shorter leg to stabilize the pelvis during single-leg stance. This muscle is responsible for abducting the hip joint, effectively keeping it from collapsing in the frontal plane.
The piriformis, a deep external rotator in the hip, also comes under sustained tension. The person develops chronic aching pain in the hip, the gluteal region, or sometimes even in the lower back. Scans often identify no structural defect in the hip joint itself, and none can be found because the joint is not structurally defective. The tilted pelvis is a consequence of the functional short leg, the latter being a result of the collapsed foot – but nobody looks at the foot.
Why treating the symptom site usually fails
This is often the point that chronic pain management systems fail. Mainstream medical solutions for knee and hip pain – anti-inflammatories, cortisone, local physio – work on the principle that the problem lives where the pain lives. When the pain is a symptom of compensation, not location, that logic falls apart.
Physio that isolates and strengthens the hip can certainly help. The muscles get stronger; the inflammation subsides; the pain drops. But if the client then walks back into their world and continues to overload those joints with the same faulty foot mechanics on every step, the pain returns. The compensation hasn’t budged. The output changes for a while, but the input is still off.
Treating the joint without assessing the gait is akin to solving the symptoms of a computer glitch by replacing the monitor.
What a clinical gait assessment actually involves
Today, podiatric evaluation is no longer just about what the specialist can see. Using pressure plates incorporated into walkways, computerized gait analysis can record the precise force distribution spanning the foot throughout every step taken. Pressure peaks, load timing, forefoot-to-rearfoot ratios are all recorded beyond the clinician’s discernment of their visual field.
High-speed video cameras further extend the analysis, recording movement at rates that catch micro-deviations too small to be seen by the naked eye. A brief calcaneal eversion on heel strike, a destabilized midtarsal joint 40 ms ahead of schedule – these are the kinds of issues that may be driving a lot of a patient’s pain, and unless you are looking for them, they are likely not being measured in a standard clinical consultation.
Gait anomalies are genuinely complex, and the relationship between foot mechanics and upper-joint loading can be non-obvious even to experienced clinicians without the data. This is where professional clinical input becomes necessary rather than optional. Consulting a qualified podiatrist perth is the most direct route to a biomechanical assessment that actually maps your individual loading patterns and identifies where the chain is breaking down.
Custom orthotics versus what you buy in a pharmacy
When individuals experience pain in their feet, knees, or hips, one of the first steps taken is to purchase an insole from a drug store, or even an over-the-counter orthotic. Insoles held in stock at a pharmacy or sports shop are built around an average foot shape and a standardized arch height (regardless of whether that arch is the same height as yours or not), for the simple reason that no retailer carries a unique SKU for every perceivable arch height, forefoot width, or calcaneal position. So if a patient can’t see a professional, they just have to hope that the off-the-shelf angle of support works for them.
Some don’t do much at all but provide a bit of cushioning. Some do make feet feel more comfortable because they actually provide lateral support to keep weight off a sore joint. A shameful number of them probably make the biomechanics of the problem worse. Custom orthotics are vastly different, in a clinically meaningful way rather than a price-bracket or profit-motive kind of way. They’re engineered from a scan or cast of the individual foot – a scan taken in the neutral subtalar joint position so that the foot is captured as it is in the standing position, under the full weight of the body. They’re prescribed to specific angles – i.e., calcaneal eversion support, medial arch support height, forefoot posting – based on the gait analysis data we took at the same time as the scan.
Footwear as part of the mechanical system
Orthotics are part of a bigger picture. The type of shoe you wear with them matters a lot. A shoe is not just something that covers your foot – it actually works together with the foot’s mechanical structure. A bad shoe choice can negate the positive effects of good foot mechanics or orthotic support.
You can diagnose issues based on the wear patterns of the shoe sole. Excessive wear on the inner heel means you are overpronating. Wear on the outer edge means you are oversupinating. Most people have never thought about the bottom of their shoes in that way, but a worn shoe is a detailed history of how you load your feet with each step.
For people with flexible, pronating feet, stability or motion-control shoes can provide the necessary blocking of arch collapse. For high-arched, rigid feet, a neutral shoe with cushioning capacity can absorb the ground reaction forces that the foot itself won’t soften. Put those shoes on the wrong foot type, and you’re stopping movement where you weren’t meant to stop it or contributing more force where there’s already too much.
Athletic footwear, daily work footwear, and even casual footwear all become part of the cumulative load input across the entire kinetic chain. Changing your footwear intentionally based on foot type rather than aesthetics or brand could be one of the easiest and most underused ways to reduce mechanical stress on knees and hips.
Where the pain ends up isn’t where it starts
Long-term knee and hip pain can persist because the problem is being addressed at the wrong spot. The painful joint is the joint compensating. The problem, more often than not, is lower down – in a foot that is collapsing too far under load, a foot that is too stiff to dissipate load, or an imbalance that is silently tipping the pelvis with each and every stride.
Having an adequate biomechanical evaluation shifts the question from “what is wrong with my knee?” to “what is my knee reacting to?” That’s a question that yields results.
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