Orthotic Insoles for Running: When They Help — and When They Don't

Few topics divide runners as much as orthotic insoles. Some swear by them — knee pain vanished once they started wearing insoles. Others call them an expensive placebo that only weakens the foot. Both camps are partly right. Sports science paints a nuanced picture: for certain complaints insoles are well supported, for others they deliver little to nothing — and for healthy runners without symptoms, potentially even harm. This article sorts out what is actually true, for whom insoles are worth it, and how to use them correctly.

What insoles are — and what they are not

An insole is a shaped insert between foot and shoe sole. It changes pressure distribution, foot position and the leverage ratios in the ankle. Three main types are distinguished:

• Soft cushioning insole: cushions and pads, but corrects little. Useful for pressure pain, metatarsalgia or a sensitive foot, for example in diabetes.
• Insole with support elements: usually a medial arch or heel-cup element that slightly lifts or guides the rearfoot. The most common sports type.
• Custom orthopaedic shoes/orthoses: the strongest form, for pronounced deformities or after injuries — a different case we do not cover here.

It matters what an insole cannot do: it trains no muscle and fixes no running-technique deficits. It is a passive measure that brings the foot into a more favourable position — nothing more and nothing less. And from that follows exactly when it helps and when it does not.

When insoles reliably help

The evidence is surprisingly clear in some areas. Of the most common foot and lower-leg problems, three groups benefit most clearly:

• Plantar fasciitis: Here the insole with a heel cup is first-line treatment. Symptomatic improvement usually comes within six to twelve weeks — alongside unloading and stretching, see Plantar fasciitis in runners.
• Shin splints: Posteromedial stress syndrome responds well in studies to insoles with medial support when the foot rolls inward. Here too: the unloading phase matters more than the insole alone.
• Foot and pressure pain: Metatarsalgia, heel spur, Morton's neuroma — here the insole simply takes pressure off the painful zone.

The common thread: these are complaints where mechanical unloading at the painful spot is plausible. That is exactly where an insole earns its money.

When they deliver little or nothing

And then there are the cases where the insole is sold as a universal cure — and the proof is missing:

• Overpronation without symptoms: The idea that an inward-rolling foot is inherently bad is a myth. The old "pronation is evil" picture flipped over the last decade. Pronation is a normal cushioning motion, not a defect.
• Runner's knee, hip, back and Achilles problems: The evidence ranges from weak effects to contradictions. Usually the cause lies further up the chain anyway — weak hip and glute muscles.
• Prevention in healthy runners: If you have no symptoms, you should not wear an insole. Passive supports on healthy feet weaken the foot muscles and your own foot control instead of challenging them.

An important point on miscategorisation: in many studies athletes benefit regardless of whether they wear the "medially supporting" or the "neutral" insoles. That is a strong indication of a placebo factor. It cannot be dismissed — pain relief based on suggestion is still relief. You should just know that you are getting it.

Which insole for which runner?

The key finding from the research: there is no single "correct" insole for a given foot type. What counts is symptom, fit and individual response — not foot shape. Even so, two practical types have proven themselves for everyday training:

• Neutral sports insole with good cushioning: the right choice for healthy runners who want more comfort and better fit in the shoe. It corrects nothing but cushions and takes out peak pressures.
• Insole with moderate medial support: for foot and lower-leg problems when the rearfoot also rolls inward dynamically. Moderate support matters, not aggressive support.

The real crux in running is not the insole itself but the footwear. A thicker insole simply does not fit into a light racing shoe with little natural volume — the foot gets squeezed and the toes collide. Sports insoles belong either in a shoe with enough volume or in a shoe for which the insole was ordered. If you are buying new shoes, read Buying running shoes: what matters.

Break-in: the decisive two to four weeks

The second most common mistake after the wrong prescription is starting too fast. An insole changes foot position — the muscles, ligaments and tendons have to adapt. That takes time.

• Week 1: wear the insole only in daily life, not for running. It should fit without pressure. If it presses — get it adjusted, do not "push through".
• Week 2: three to four short runs of 20 to 30 minutes, easy, with the insole. The other runs without it, in your usual shoe.
• Week 3: longer runs with the insole. If needed, cut intensity by 10 to 15 percent to cushion the change.
• Week 4: if everything is clearly better, you can run all sessions with the insole. With new pain: stop, make an appointment with the orthopaedic specialist.

Do not raise volume and intensity at the same time during the break-in. The same rule applies as for any new load — noticeable increases need measurable time, see Increasing training volume.

The quiet alternative: foot strength instead of support

If insoles deliver little for knee, hip and back problems, what helps? Here the research is very consistent: strength training — above all for glutes, hips and foot. The glutes control how the leg absorbs load as it lands. Weak glutes let the thigh rotate inward and the knee cave in — and the chain rubs further down. That is precisely where the passive support seems to reach its limit.

The same holds for the foot: calf and foot muscles are trainable. Calf raises through full range, toe spreading, guided barefoot running on soft ground — all of that builds capacity no insole can ever build. No wonder runners who consistently build strength alongside the insole can often drop the insole after six to twelve months. When the situation is unclear, that is the best investment, see Foot strength for runners.

Cost and coverage, realistically assessed

Sports insoles at the orthopaedic specialist cost, in Austria, between roughly 60 and 250 euros depending on type and degree of customisation. Therapeutic (prescribed) insoles are partly covered by health insurers; pure sports insoles without a medical indication you usually pay for yourself. It is worth asking up front exactly what is being prescribed and what it will cost you — rather than discovering afterwards that the insole does not fit the shoe volume for running and you spent 180 euros for nothing.

Frequently asked questions about insoles for running

Do orthotic insoles help with running?

For some complaints yes, for others no. There is good evidence for foot pain, plantar fasciitis and shin splints. For knee, hip and back pain the evidence is weak to contradictory — there an insole often delivers less than targeted strength training.

Can I keep running with insoles?

Generally yes, but only with a break-in phase. Start with short walks and a maximum of 20 minutes of running, and build over two to four weeks. If new pain appears, the insole is too high, too hard or wrongly positioned — go back to the orthopaedic specialist.

Do insoles replace stable shoes or strength training?

No. Insoles change pressure distribution, but they train no muscle. Building foot and calf strength is up to you — otherwise the cause remains. Insoles are one component alongside training and shoes, not a replacement for them.

Are insoles for runners covered by insurance?

In Austria health insurance covers therapeutic insoles where there is a medical indication — sports insoles for healthy runners are usually paid privately. Insoles intended purely for performance are not a covered benefit.