If you're training for a marathon in Toronto — whether you're logging long runs through the Don Valley, racing with a club in North York, or building your mileage along the waterfront — your feet are carrying the full weight of that effort, stride after stride. Foot care for marathon runners in Toronto is something many athletes overlook until an injury forces them to stop. At Donwood Foot & Orthotic Clinic, located at 51 Underhill Drive in North York, our chiropodists work with runners to assess foot mechanics, manage common running-related conditions, and determine whether custom orthotics or other treatments may support your training.

This guide covers the most common foot problems in marathon runners, how professional foot care works, and how to know when it's time to book an assessment.

Training for a race? Don't wait for an injury. Book a foot assessment with Donwood Foot & Orthotic Clinic and get ahead of the issues that sideline runners. 📞 (416) 445-1414 | Book an Appointment

Table of Contents

1. Why Marathon Runners Need Specialized Foot Care

2. Common Foot Problems in Marathon Runners

3. Running Injuries Custom Orthotics May Help Support

4. Plantar Fasciitis and Heel Pain in Runners

5. Achilles Tendon Pain, Calf Tightness, and Overuse Strain

6. Black Toenails, Blisters, Corns, and Calluses from Running

7. Flat Feet, High Arches, Overpronation, and Gait Issues

8. How a Running Foot Assessment Works

9. Custom Orthotics for Marathon Runners

10. Custom Orthotics vs. Running Shoe Insoles

11. Foot Care Before, During, and After Marathon Training

12. When Toronto Runners Should Book a Foot Assessment

13. Why Choose a Local North York Foot Clinic for Running Foot Pain

14. Frequently Asked Questions

Why Marathon Runners Need Specialized Foot Care

Marathon training is one of the most physically demanding activities a body can take on. By race day, a marathon runner may have logged hundreds of kilometres in training — each step placing force on the feet, ankles, knees, and hips. The cumulative load of high-mileage training blocks, tempo runs, long Sunday runs, and recovery jogs adds up quickly.

The foot is the point of first contact with the ground on every single stride. When something is slightly off — in foot alignment, gait mechanics, or footwear fit — those small inefficiencies can compound across thousands of steps into injury.

Specialized foot care for runners isn't only about treating problems after they develop. A proactive assessment before or during a training cycle can help identify risk factors, address contributing mechanics, and support comfort through the demands of race preparation. A chiropodist with experience in running injuries understands the unique pressures of sport-specific foot care and can tailor recommendations accordingly.

Common Foot Problems in Marathon Runners

Runners deal with a distinct set of foot complaints compared to the general population. The following are among the most frequently seen conditions in marathon and long-distance runners:

• Plantar fasciitis — arch and heel pain caused by repetitive strain on the plantar fascia

• Heel pain and heel spurs — often linked to plantar fascia loading during high-mileage training

• Achilles tendon pain — ranging from tendinopathy to more acute presentations

• Arch pain and metatarsalgia — forefoot discomfort common in longer runs

• Shin splints — sometimes related to foot mechanics and overpronation

• Knee, hip, or lower back discomfort — that may be associated with altered running mechanics

• Black toenails (subungual hematoma) — from repetitive pressure against the toe box

• Blisters — caused by friction, moisture, and ill-fitting footwear

• Corns and calluses — thickened skin in areas of repeated pressure or friction

• Ingrown toenails — particularly common in runners with improper nail care or tight footwear

• Pressure points — from running shoes that don't accommodate foot shape

Any pain that is sudden, severe, worsening, or persistent should be professionally assessed rather than trained through. Continuing to run on an unassessed injury can delay recovery and increase the risk of a more significant problem.

Running Injuries Custom Orthotics May Help Support

Custom orthotics are one of the tools chiropodists use when managing biomechanical contributors to running injuries. They are not appropriate for every situation, but when a gait assessment identifies mechanical factors contributing to your pain — such as overpronation, uneven loading, or arch collapse under load — orthotics may be recommended as part of a broader treatment approach.

Running-related conditions for which orthotics are commonly considered include plantar fasciitis, heel pain, arch pain, metatarsalgia, shin splint presentations linked to foot mechanics, and discomfort in the knee or hip that may trace back to altered foot strike patterns.

An assessment is always the first step. Custom orthotics for runners are designed around your specific foot structure, running gait, training volume, and the footwear you run in — not a generic template.

→ Learn more about Custom Orthotics at Donwood Foot & Orthotic Clinic.

Plantar Fasciitis and Heel Pain in Runners

Plantar fasciitis is one of the most common running injuries seen in Toronto runners — from those completing their first half-marathon to experienced competitors training for spring races. It presents as pain in the heel or arch, typically sharp and most intense with the first steps of the morning or after periods of rest.

In runners, plantar fasciitis is often associated with a rapid increase in training volume, changes in running surface, inadequate footwear, or biomechanical factors such as overpronation or reduced ankle mobility.

Custom orthotics for plantar fasciitis are designed to support the arch and reduce strain on the plantar fascia during loading. They are commonly used alongside footwear modifications, stretching protocols, and, in some cases, shockwave therapy for persistent presentations.

Heel pain that does not improve with rest, or that worsens through a training cycle, warrants professional assessment.

→ Learn more: Plantar Fasciitis | Heel Pain | Shockwave Therapy

Achilles Tendon Pain, Calf Tightness, and Overuse Strain

Achilles tendon pain is another frequent companion of serious marathon training. The Achilles connects the calf muscles to the heel bone and is placed under significant load with every push-off during running — particularly on hills, during speed work, or when mileage increases quickly.

Achilles tendinopathy typically presents as stiffness and pain at the back of the heel or lower calf, often worse in the morning or at the start of a run. Contributing factors can include calf tightness, footwear changes, training load, and foot mechanics — particularly issues with ankle dorsiflexion or heel strike patterns.

A foot assessment that includes gait analysis may help identify whether foot and ankle mechanics are contributing to Achilles strain. In some cases, heel lifts or orthotic modifications may be part of the management approach.

Important: Achilles pain should never be ignored or trained through aggressively. Sudden or sharp Achilles pain, especially after a pop or snap, requires immediate professional attention.

Black Toenails, Blisters, Corns, and Calluses from Running

Not all running foot problems are biomechanical. The skin and nails take a significant beating over the course of marathon training, and these issues — while sometimes dismissed as minor — can have real impact on comfort and performance.

Black Toenails

Subungual hematoma, commonly known as black toenail, is caused by repetitive impact or pressure between the toe and the front of the running shoe. It's particularly common during downhill running or when shoes are too short. A chiropodist can assess the nail, relieve pressure where appropriate, and advise on footwear fit and nail care to reduce recurrence.

→ See also: Ingrown Toenails | Fungal Nails

Blisters

Blisters form when friction between the skin and sock or shoe creates a fluid-filled pocket. They are most common during long runs, in wet conditions, or when footwear is new or ill-fitting. Prevention focuses on moisture-wicking socks, appropriate shoe fit, and anti-friction products. When blisters are recurrent or become infected, professional assessment is recommended.

Corns and Calluses

Thickened skin on the toes, ball of the foot, or heel is a sign of repeated pressure or friction. While some callus formation is a normal response to running, excessive buildup or painful corns can affect gait and comfort. A chiropodist can safely debride and treat these areas and advise on whether orthotics or footwear changes may reduce the contributing pressure.

→ Learn more: Corns and Calluses

Flat Feet, High Arches, Overpronation, and Gait Issues

Foot structure plays a significant role in how force is distributed during running. Two of the most common structural presentations in runners are flat feet and high arches — each with different mechanical implications.

Flat feet and overpronation — Runners with flat feet often overpronate, meaning the ankle rolls inward excessively during the gait cycle. This can increase stress on the arch, knee, and hip. Over long training distances, the cumulative effect of overpronation may contribute to a range of injuries.

High arches and underpronation — A high-arched foot is often rigid and doesn't absorb shock as effectively. Runners with high arches may place more pressure on the heel and ball of the foot, increasing the risk of stress injuries and forefoot pain.

Shin splints — Medial tibial stress syndrome is sometimes linked to overpronation and altered foot mechanics. When foot alignment is a contributing factor, addressing it through orthotic therapy or gait retraining may be part of the management plan.

A running gait assessment in North York at Donwood Foot & Orthotic Clinic can provide a clearer picture of how your foot mechanics may be influencing your injury risk and comfort during training.

→ Book a Foot Assessment

How a Running Foot Assessment Works

A running-focused foot assessment at a chiropody clinic is more comprehensive than a basic shoe fitting. At Donwood Foot & Orthotic Clinic, a typical assessment for a runner may include:

1. Health and training history — your current mileage, race goals, injury history, and any current complaints

2. Foot structure assessment — arch type, alignment, joint mobility, and any structural concerns

3. Gait and biomechanical analysis — observing how your foot moves during walking and, where relevant, running

4. Pressure assessment — identifying areas of concentrated load during gait

5. Footwear review — evaluating your current running shoes and their wear patterns

6. Treatment discussion — based on findings, your chiropodist will outline whether custom orthotics, footwear changes, nail or skin care, or other treatments are appropriate

The findings from this assessment form the basis of any orthotic prescription or treatment plan.

→ Learn more about the Foot Assessment process.

If you are training for a marathon or dealing with running-related foot pain in Toronto, North York, Don Mills, or nearby communities, book a foot assessment with Donwood Foot & Orthotic Clinic. 📞 (416) 445-1414 | Book an Appointment

Custom Orthotics for Marathon Runners

Custom orthotics for runners are designed with the demands of high-mileage training in mind. Unlike orthotics made for everyday footwear, running orthotics are typically thinner, lighter, and constructed from materials that can handle repetitive impact across hundreds of kilometres.

A chiropodist designing orthotics for a marathon runner will consider:

• Foot structure and arch type — the three-dimensional shape of your foot at rest and under load

• Running gait pattern — how your foot strikes, loads, and pushes off during running

• Pressure distribution — areas of elevated loading during your gait cycle

• Training volume and terrain — road racing vs. trail running vs. treadmill training have different demands

• Race footwear — orthotics are fitted to the specific shoes you run in

• Training goals and timeline — racing season, recovery phase, and current injury status

Running orthotics can be designed to control overpronation, support the arch, redistribute pressure away from painful areas, or accommodate structural issues that affect your mechanics.

→ Custom Orthotics | Foot Assessment for Runners

Custom Orthotics vs. Running Shoe Insoles

Many runners rely on the insoles that come with their running shoes, or purchase over-the-counter running inserts from a running store. Here's how they compare to custom orthotics:

For recreational runners with mild concerns, a quality running shoe and OTC insole may be sufficient. For those with persistent pain, biomechanical concerns, or a history of recurrent running injuries, a professional assessment and custom orthotic may offer more targeted support.

Foot Care Before, During, and After Marathon Training

Before training:

• Have your foot structure and gait assessed, especially if you have a history of running injuries

• Ensure your running shoes fit correctly — length, width, and heel counter support

• Address any existing nail or skin concerns before high-mileage begins

During training:

• Monitor any new or worsening pain — don't dismiss discomfort as normal soreness

• Maintain nail length short and straight across to reduce black toenail and ingrown nail risk

• Use moisture-wicking socks and appropriate sock thickness for your shoe fit

• Rotate footwear to allow midsoles to recover between runs

• Any sudden or worsening pain should be assessed promptly

After a race or high-mileage block:

• Allow adequate recovery time before resuming full training

• Have any persistent pain, skin changes, or nail damage assessed by a chiropodist

• Reassess footwear and orthotics, particularly if your running volume or training surface has changed significantly

When Toronto Runners Should Book a Foot Assessment

You don't need to be injured to benefit from a professional foot assessment. Proactive assessment is particularly valuable when beginning a new training cycle or stepping up your mileage significantly.

Book a foot assessment if you are experiencing:

• Heel pain that is worst first thing in the morning or after runs

• Arch pain or tightness during or after running

• Pain at the back of the heel or lower calf (possible Achilles involvement)

• Forefoot or ball-of-foot pain on longer runs

• Knee, hip, or lower back discomfort that appears to be linked to your running

• Shin pain along the inner leg

• Recurring blisters in the same location despite footwear changes

• Painful or thickened calluses or corns

• A black toenail that is painful, not resolving, or recurring

• An ingrown toenail that is red, swollen, or tender

• Discomfort in your current orthotics or running insoles

• A history of running injuries in a previous training cycle

Seek prompt assessment if:

• Pain is sudden, severe, or accompanied by swelling or bruising

• You felt or heard a pop in your heel, Achilles, or ankle area

• Pain is worsening despite rest

→ Book a Foot Assessment at Donwood Foot & Orthotic Clinic

Why Choose a Local North York Foot Clinic for Running Foot Pain

Access to professional foot care shouldn't require a long commute — particularly when you're deep in a training block and time is limited.

Donwood Foot & Orthotic Clinic is located at 51 Underhill Drive, Unit 4, in North York, within easy reach of Don Mills, Don Valley Village, Parkwoods, Bayview Village, Leaside, Scarborough, East York, Midtown Toronto, and the broader city. Runners from across Toronto regularly visit our clinic for gait assessments, orthotic therapy, and general chiropody care.

Our chiropodists are regulated professionals with training in biomechanics, orthotic prescription, sports foot care, and nail and skin conditions. Whether you're preparing for your first 5K or your fourth full marathon, we aim to provide thorough, individualized care that supports your goals.

When you search for a foot clinic near me or a chiropodist near me as a runner in North York or Toronto, Donwood Foot & Orthotic Clinic is here as a trusted local option.

→ About Donwood Foot & Orthotic Clinic

Ready to run stronger and more comfortably? Book a foot assessment at Donwood Foot & Orthotic Clinic, serving runners throughout North York, Don Mills, Scarborough, East York, Leaside, Bayview Village, and Toronto. 📞 (416) 445-1414 | Book an Appointment | https://donwoodfootclinic.janeapp.com/

Frequently Asked Questions

Should marathon runners see a chiropodist?

Yes — marathon training places significant and repetitive stress on the feet, and many running injuries have a biomechanical component that a chiropodist is trained to assess. Seeing a chiropodist proactively — before an injury develops — can be particularly valuable for runners entering a high-mileage training block or preparing for a goal race.

Can custom orthotics help runners?

Custom orthotics are commonly used to help manage biomechanical contributors to running injuries. When a gait and foot assessment identifies factors such as overpronation, arch collapse, or uneven pressure distribution, custom orthotics designed for your running footwear and training demands may help support more efficient mechanics and reduce strain on vulnerable structures.

Can orthotics help plantar fasciitis from running?

Orthotics are frequently used as part of the management of running-related plantar fasciitis. They may help support the arch and reduce strain on the plantar fascia during the loading phase of each stride. A chiropodist assessment is needed to determine whether orthotics are appropriate for your specific presentation. → Plantar Fasciitis

Why do I get heel pain after long runs?

Heel pain after long runs is commonly associated with plantar fasciitis, heel bursitis, or Achilles-related strain. It may be aggravated by training load, footwear, surface type, or biomechanical factors. Persistent heel pain after running should be assessed by a chiropodist to identify the contributing cause and appropriate management. → Heel Pain

What causes black toenails in runners?

Black toenails (subungual hematoma) are caused by repetitive impact between the toe and the front or top of the running shoe. Common contributing factors include running shoes that are too short, downhill running, and longer race distances. A chiropodist can assess the nail and advise on footwear fit, nail care, and prevention strategies. → Ingrown Toenails

How can runners prevent blisters?

Blister prevention focuses on reducing friction and managing moisture. Key strategies include wearing moisture-wicking running socks, ensuring shoes fit properly (with adequate toe box space), using anti-friction products on high-contact areas, and breaking in new shoes gradually. Recurring blisters in the same location may indicate a pressure or fit issue worth assessing professionally.

Do I need custom orthotics or better running shoes?

Sometimes the answer is one or the other — and sometimes both work together. A quality running shoe that fits your foot type is always the foundation. However, if you have a specific biomechanical concern, persistent injury, or a foot structure that standard running shoes don't accommodate well, custom orthotics may offer more targeted support. A gait assessment with a chiropodist can help clarify which is most appropriate for your situation.

Can orthotics help with overpronation?

Orthotics are commonly prescribed to help manage overpronation in runners. A functional orthotic can help control the inward rolling of the ankle during the gait cycle, potentially reducing strain on structures such as the arch, plantar fascia, knee, and hip. An assessment is needed to confirm whether overpronation is present and to what degree, and whether orthotics are appropriate.

Should I run with foot pain?

This depends on the type and severity of the pain. General muscle soreness is a normal part of training. However, sharp, sudden, worsening, or persistent pain — particularly in the heel, arch, Achilles, or forefoot — should be professionally assessed before continuing high-mileage training. Running through unassessed pain can delay recovery and increase the risk of a more significant injury.

Where can marathon runners get a foot assessment in North York or Toronto?

Donwood Foot & Orthotic Clinic is located at 51 Underhill Drive, Unit 4, North York, ON, and serves runners from Don Mills, Don Valley Village, Parkwoods, Bayview Village, Leaside, Scarborough, East York, Midtown Toronto, and across the city. Call (416) 445-1414 or visit https://donwoodfootclinic.janeapp.com/ to book a foot assessment.