| Injury | How Insoles Help | Best Insole Type |
|---|---|---|
| Plantar Fasciitis | Reduces fascia tension by 14-25% | Semi-rigid arch post + deep heel cup |
| Shin Splints (MTSS) | Controls tibial rotation by limiting pronation | Stability/motion control for overpronators |
| Runner’s Knee (PFPS) | Reduces medial knee loading via pronation control | Semi-rigid arch + lateral heel posting |
| Metatarsal Stress Fracture | Distributes forefoot pressure; met pad reduces peak load | Full-length with met support |
| IT Band Syndrome | Lateral wedging corrects supination-driven hip drop | Neutral cushioning for high-arch runners |
The most common mistake we see is runners buying gel insoles that are marketed as “cushioning upgrades” without arch support. These insoles add softness but provide zero biomechanical control — the plantar fascia strain, tibial rotation, and metatarsal loading that cause running injuries are unaffected by additional gel cushioning. A runner with plantar fasciitis who adds a gel insole is adding comfort while allowing the mechanical damage to continue. Architecture first, cushioning second.
How long do running insoles last?
Quality running insoles last 300–500 miles or 6–12 months, whichever comes first. The arch support shell degrades before the cushioning visibly compresses. Replace insoles when you replace your shoes, or sooner if pain begins to return after previous resolution.
Treatment at Balance Foot & Ankle: Custom 3D Orthotics →
Should I remove the stock insole when adding aftermarket insoles?
Yes — always remove the stock insole first. Running shoes are designed with specific stack heights, and adding an insole on top of the stock insole can make the shoe too tight, alter the heel drop, and reduce forefoot volume. Remove the stock insole, insert the aftermarket insole, and check that the shoe fits comfortably with a thumbnail of space at the toe.
Can insoles replace running shoes?
No — insoles and running shoes are complementary. A quality insole in a worn-out shoe doesn’t overcome the degraded midsole. A great shoe with a flat stock insole leaves biomechanical control on the table. Both need to be optimized simultaneously for best outcomes.
When should a runner see a podiatrist?
See a podiatrist at the onset of persistent pain that affects your training, if OTC insoles haven’t resolved pain within 4–6 weeks, or if you want a gait analysis and custom orthotic assessment. Call (810) 206-1402.
Dr. Tom Biernacki provides comprehensive running injury evaluation including video gait analysis, arch-type assessment, and custom orthotic fabrication for runners who need more than OTC insoles can provide. Custom running orthotics are precisely molded and posted to match your specific gait pattern — the difference in biomechanical control over OTC insoles is clinically significant for moderate-to-severe pronation. Same-day appointments at Howell and Bloomfield Hills.
Don’t let foot pain end your training. Dr. Tom Biernacki has treated thousands of runners and gets you back on the road fast.
Book Your Appointment4330 E Grand River Ave, Howell MI | 43494 Woodward Ave #208, Bloomfield Hills MI
1. Cheung RT, Ng GY. “Efficacy of motion control shoes for reducing excessive rear-foot motion in fatigued runners.” Physical Therapy in Sport. 2007;8(2):75-81.
2. Larsen K, et al. “Footwear and running injuries.” Sports Medicine. 2022;52(11):2631-2645.
3. Nielsen RO, et al. “Shoe features and running injury risk.” Journal of Orthopaedic & Sports Physical Therapy. 2024.
For more on related conditions and treatments:
Need to see a podiatrist? Call (810) 206-1402 or book online. Same-week availability.
OTC orthotics: 9-12 months. Custom orthotics: 3-5 years. Replace when the heel cup softens or you no longer feel arch support.
For mild issues OTC works. For chronic plantar fasciitis, severe overpronation, or post-surgical recovery, custom orthotics outperform OTC by a wide margin.
No clinical evidence supports this. Orthotics offload painful structures so you can move more, which strengthens muscles indirectly.
See a podiatrist if: foot or ankle pain has lasted more than 2–4 weeks without improvement, you’re changing your gait to avoid pain, you have an open wound or sore that isn’t healing, you notice nail discoloration or thickening, you have diabetes and any foot concern, or pain is severe enough to wake you at night. Most foot conditions are easier and cheaper to treat early — what starts as a minor issue can become a surgical problem with months of delay.
Podiatrists (DPM — Doctor of Podiatric Medicine) specialize exclusively in the foot, ankle, and lower leg. Orthopedic surgeons (MD/DO) have broader musculoskeletal training but variable foot/ankle subspecialization. For foot and ankle-specific problems, a podiatrist often has more focused training and experience. For injuries involving the leg above the ankle, complex pediatric cases, or multi-level reconstruction, orthopedic consultation may be appropriate. We frequently co-manage patients with orthopedic colleagues.
Signs that warrant same-day or next-day evaluation: severe pain that appeared suddenly without clear cause, swelling, redness, and warmth that appeared suddenly (possible gout, infection, or Charcot fracture), an open wound that looks infected (redness spreading, pus, warmth), inability to bear weight, or any foot problem in a diabetic patient. Pain that’s been present for weeks and is stable is important but not an emergency — schedule within 1–2 weeks.
Yes — this is a kinetic chain effect. Abnormal foot mechanics (overpronation, supination, leg length discrepancy) cause compensatory changes in knee, hip, and lumbar alignment. Roughly 30% of patients presenting to our clinic with knee pain have a treatable foot-level biomechanical cause. Correcting foot mechanics with orthotics or appropriate footwear often provides significant knee and back relief. If you have chronic knee or back pain and haven’t had your foot mechanics evaluated, it’s worth a consult.
For the right conditions, yes — custom orthotics are among the most cost-effective interventions in podiatry. They’re most effective for: plantar fasciitis, flat feet with secondary knee/back pain, leg length discrepancy, metatarsalgia, posterior tibial tendon dysfunction, and diabetic foot pressure management. Quality OTC orthotics ($35–60) resolve symptoms for 60% of patients with mild-to-moderate conditions. Custom orthotics are appropriate when OTC options have failed or when the biomechanical problem is complex. We cast custom orthotics in-office.
Start with your foot type (flat, neutral, high arch) and running pattern (overpronator, neutral, supinator). Flat feet and overpronators do best in stability or motion-control shoes. Neutral feet do well in neutral-cushioned shoes. High arches need maximum cushioning with flexible soles. Always buy running shoes at the end of the day (foot swelling peaks then), get properly fitted by a specialist, and replace every 300–500 miles. If you’ve been injured repeatedly, a gait analysis can identify the mechanical flaw driving your injury pattern.
A sprain is a ligament injury (the tissue connecting bones); a fracture is a break in the bone itself. Both can occur with the same trauma (ankle roll, fall). The old test — ‘if you can walk, it’s not broken’ — is wrong; many fractures are initially weight-bearable. Key differences: a fracture typically produces localized bone tenderness along the bone itself, while a sprain is tender over the ligament. X-ray is the standard to differentiate. High-grade sprains without proper treatment can be as disabling as fractures.
The four most impactful prevention strategies: (1) Supportive, appropriately fitted footwear for your foot type and activity. (2) Gradual activity progression — the 10% rule (never increase weekly mileage or intensity by more than 10%). (3) Regular calf and ankle mobility work. (4) Strengthening the posterior tibial tendon, peroneals, and intrinsic foot muscles. Most overuse injuries are preventable; most acute injuries are not — but ankle sprain recurrence (60–70% without rehab) is prevented by balance and proprioception training.
Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.
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