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Foot & Ankle PainPlantar Fasciitis, Achilles & Ankle Sprains

Plantar fasciitis, Achilles tendinopathy, ankle sprains, and foot pain in runners and active patients. Foot mechanics affect the whole lower limb.

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The short version

The foot is the body's contact point with the ground. Ankle dorsiflexion restriction is a common contributing factor in both foot and knee problems. Active loading is the recommended first-line approach for most tendinopathies. Under-rehabilitated ankle sprains leave neuromuscular deficits that increase reinjury risk.

Why foot mechanics matter beyond the foot

Foot and ankle problems are among the most common issues in runners. Plantar fasciitis, Achilles tendinopathy, and ankle stiffness frequently develop as training load increases or footwear changes. How the foot loads, pronates, and pushes off directly influences forces at the ankle, knee, hip, and lower back. Foot mechanics that work fine for walking can become problematic when running mileage increases, footwear changes, or lower limb strength decreases.

Ankle dorsiflexion restriction is a common contributing factor in both foot and knee problems. Limited dorsiflexion is associated with compensatory pronation of the foot, knee valgus during squatting and running, and altered hip mechanics. Assessing and addressing dorsiflexion is a core part of foot and ankle management. Manual mobilization of the talocrural and surrounding foot joints is associated with improved pain and function in plantar fasciitis and post-sprain stiffness, recommended in clinical practice guidelines[9][10] and supported in systematic reviews of manual therapy for these presentations.

Common causes

  • Plantar fasciitis: classic morning heel pain from irritation of the plantar fascia at its calcaneal attachment. Typically responds well to targeted loading exercises (calf raises on a step), ankle mobilization, and sometimes taping. Most cases improve within 12 months. Active treatment won't shorten the biological timeline, but it does manage pain and maintain appropriate tissue loading during recovery. Rest alone doesn't provide that.
  • Achilles tendinopathy (mid-portion): pain 2–6 cm above the heel, typically from a training load increase. Loading-based rehabilitation is the primary treatment. Heavy slow resistance and eccentric calf loading are both supported by evidence and produce comparable outcomes.
  • Achilles tendinopathy (insertional): pain right at the heel-tendon junction. More compression-sensitive than mid-portion. Calf raises through full range can aggravate it; a modified loading protocol is needed. The distinction matters for the exercise prescription.
  • Lateral ankle sprains: common and frequently under-rehabilitated. A sprain that resolved symptomatically but wasn't properly rehabilitated often leaves mechanical laxity and neuromuscular deficits that increase reinjury risk. Balance training and peroneal strengthening are essential for full recovery.
  • Peroneal tendinopathy: lateral ankle pain behind the fibula. Common after repeated ankle sprains. Different from IT band or hip presentations, needs a specific loading and stabilization program.

What helps

Joint mobilization of the ankle, subtalar, and midfoot joints restores restricted motion. This is supported for plantar fasciitis and post-sprain stiffness. Combined with progressive loading rehabilitation targeting the specific tendon or structure involved, many uncomplicated foot and ankle conditions are amenable to conservative care. The approach combines manual therapy with a loading programme, and extends to a whole-limb assessment for active patients, looking upstream at how ankle mechanics connect to the knee and hip rather than treating the foot in isolation.

On orthotics

Orthotics can be helpful in specific situations, but are not routinely the first step. Research doesn't consistently show custom orthotics are superior to off-the-shelf options for most common presentations. If I think orthotics would genuinely help, I'll refer you to a podiatrist for a proper biomechanical assessment. If not, I'll say so.

How I approach foot and ankle pain

What I bring to these presentations is a whole-body kinetic chain assessment, looking at how ankle restriction connects upstream to the knee and hip, not just at the foot in isolation. Foot mechanics connect directly to load distribution throughout the lower limb and spine, and the primary driver is often upstream from where the pain is. In a typical session, I'll assess ankle dorsiflexion range, foot pronation patterns, and lower limb strength, apply joint mobilization where restriction is contributing, and give a specific loading program to work on between sessions.

If you're a runner, the aim is to find what load your tissue can tolerate right now, keep you moving, and build from there. For most presentations, stopping entirely is not the goal. Finding the right load is. If symptoms are acutely worsening, that changes the approach: load modification takes priority, and that's something we work out together. Complex foot deformities, stress fractures, and structural pathology are cases I refer to podiatry or orthopaedics when that's the right call.

Foot and ankle pain that persists is usually telling you something about load distribution or tissue tolerance that's worth investigating directly.

When to seek care promptly

See a doctor if you have:

  • Acute ankle injury with significant swelling, bruising, or inability to weight-bear (possible fracture)
  • A sudden pop or snap in the Achilles followed by weakness or inability to plantarflex (possible Achilles rupture)
  • Foot or ankle pain with numbness or tingling running into the toes
  • Heel pain in a child or adolescent that worsens with activity (possible apophysitis)
  • Persistent ankle swelling without a clear mechanism
  • Progressive heel pain in a runner or active person with a recent increase in training load (possible stress fracture; plain X-rays may appear normal initially, so seek assessment rather than continuing to load)
  • Leg or foot pain that comes on predictably during walking and eases quickly with rest (possible vascular cause)

The Ottawa Ankle and Foot Rules provide a reasonable guide for when to suspect fracture after acute ankle injury. The ankle rules cover the malleolar zone; the foot rules cover the navicular and base of the fifth metatarsal. When in doubt, get an X-ray.

Common questions

Plantar fasciitis does tend to resolve with time, but active management matters for how you feel in the meantime. What helps: calf and plantar fascia loading exercises (especially single-leg calf raises on a step), ankle and midfoot mobilization, and sometimes foot taping for symptom management. Recovery follows its own biological timeline. Treatment maintains appropriate tissue loading and manages symptoms while healing happens. Most cases improve within 12 months. If you've been doing these things consistently and it's not improving, I'll assess whether something else is contributing. If symptoms persist past the 12-18 month mark, a specialist conversation is worthwhile.

Mid-portion tendinopathy (pain 2–6 cm above the heel) and insertional tendinopathy (pain right at the heel-tendon junction) respond differently to loading. Mid-portion responds well to heavy slow resistance calf loading. Insertional tendinopathy is more compression-sensitive. The key distinction is that end-range dorsiflexion compresses the tendon against the heel bone and needs to be avoided. That means calf raises off a step are out; loading off a flat surface is the standard modification. Getting this distinction right matters for the exercise prescription.

Not ideal. Ankle sprains that aren't properly rehabilitated often leave a combination of mechanical laxity and neuromuscular deficits. The sensory system that controls balance and ankle stability doesn't fully recover without specific training. This is why recurrent ankle sprains are so common. A proper rehabilitation program including balance training, peroneal strengthening, and progressive return to sport meaningfully reduces reinjury risk: RCT evidence shows a meaningful reduction in recurrence rates, confirmed across multiple trials. If the ankle is still swollen or clicking with movement, imaging may be worthwhile to rule out osteochondral damage, which I can refer you for or discuss with your GP.

Orthotics can be helpful in specific situations, but are not always the right first step. The research doesn't consistently show custom orthotics are superior to off-the-shelf options for most common presentations like plantar fasciitis. I'll assess your foot mechanics, loading patterns, and footwear as part of the consultation. If I think orthotics would help, I'll refer you to a podiatrist for a proper biomechanical assessment. If I think they're not needed, I'll tell you that too.

Not always. The goal is usually to find a training load your tissue can tolerate while we address the underlying mechanics, not to stop entirely. For plantar fasciitis, that often means modifying run volume or surface temporarily while building calf and foot strength. Continuing to run at a reduced load is often part of the plan, not a risk. For Achilles tendinopathy, load management is central to the treatment, so we work out what you can do, not what you have to stop. I'll give you a specific answer based on what I find in the assessment.

Yes, often. Much of foot and ankle treatment targets the ankle joint, calf complex, and lower limb mechanics, not the foot itself. Many patients with plantar fasciitis, for example, have stiff ankles and tight calves as the primary contributing factors. Addressing those and prescribing loading exercises can address the underlying mechanics more directly than treatment focused solely on the foot.

References

  1. Maetz R, et al. Loading protocols vs. passive treatment for midportion Achilles tendinopathy: systematic review and meta-analysis. Orthopaedic Journal of Sports Medicine. 2023;11(5). PMC10240875
  2. Beyer R, et al. Heavy slow resistance versus eccentric training for Achilles tendinopathy: RCT. American Journal of Sports Medicine. 2015;43(7):1704-1711. PMID 26018970
  3. Habets B, et al. No difference between Alfredson eccentric and Silbernagel combined loading for Achilles tendinopathy: RCT. Orthopaedic Journal of Sports Medicine. 2021;9(10). PMID 34722783
  4. Landorf KB, et al. Effectiveness of foot orthoses to treat plantar fasciitis: RCT. Archives of Internal Medicine. 2006;166(12):1305-1310. PMID 16801514
  5. Tran K, Spry C. Canadian Agency for Drugs and Technologies in Health (CADTH). Custom-made vs. prefabricated foot orthoses: systematic review. 2019. NBK549527
  6. Hupperets MDW, et al. Effect of proprioceptive training on recurrences of ankle sprain: RCT (n=522). BMJ. 2009;339:b2684. PMC2714677
  7. Wagemans J, et al. Exercise-based rehabilitation reduces reinjury following acute lateral ankle sprain: systematic review and meta-analysis (14 RCTs). PLOS One. 2022;17(2):e0262023. DOI 10.1371/journal.pone.0262023
  8. Lima YL, Ferreira VMLM, Lima POdP, Bezerra MA, de Oliveira RR, Almeida GPL. The association of ankle dorsiflexion and dynamic knee valgus: a systematic review and meta-analysis. Physical Therapy in Sport. 2018;29:61-69. DOI 10.1016/j.ptsp.2017.07.003
  9. Koc TA, et al. Heel pain, plantar fasciitis: clinical practice guidelines revision 2023. Journal of Orthopaedic & Sports Physical Therapy. 2023;53(12):CPG1-CPG39. JOSPT CPG
  10. Martin RL, et al. Ankle stability and movement coordination impairments: lateral ankle ligament sprains revision 2021. Journal of Orthopaedic & Sports Physical Therapy. 2021;51(4):CPG1-CPG80. JOSPT CPG
  11. Fraser JJ, et al. Does manual therapy improve pain and function in patients with plantar fasciitis? A systematic review. Journal of Manual and Manipulative Therapy. 2017;26(2):55-65. PMC5901427

Disclaimer

This page is for general information only and does not constitute medical advice. Every person's situation is different. Nothing here should be used as a substitute for assessment and advice from a qualified health professional who can evaluate your specific circumstances.

If you are experiencing severe or rapidly worsening symptoms, loss of bladder or bowel control, progressive weakness, or any symptom that concerns you, seek medical care promptly rather than reading websites.

This page was written with AI assistance and reviewed by Erik Anderson for accuracy. If you find an error, please contact us and we will endeavour to correct it.

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*Results vary. Individual outcomes depend on the condition, duration of symptoms, and the person.

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