Tibialis Posterior Tendinopathy

Lower Limb

Overview

Tibialis posterior tendinopathy is a chronic overuse injury affecting the tibialis posterior muscle-tendon unit, characterized by inflammation, degeneration, or micro-tearing of the tendon. This condition commonly develops from repetitive plantarflexion and inversion activities, particularly in runners and individuals with postural dysfunction. It presents with medial ankle pain and can progress to posterior tibial tendon dysfunction (PTTD) if left untreated.

Pathophysiology

The tibialis posterior muscle originates from the interosseous membrane and posterior tibia, passing behind the medial malleolus within the flexor retinaculum before inserting into the navicular tuberosity. Repetitive microtrauma, excessive pronation of the subtalar joint, sudden increases in activity intensity, or chronic overload lead to tendon inflammation and collagen degeneration. Age-related changes in collagen elasticity, metabolic dysfunction, and inadequate load management contribute to degenerative changes. The tendon's watershed zone (region of poorest vascularization) is particularly susceptible to injury. Chronic tendinopathy involves failed healing, characterized by disorganized collagen, neovascularity, and neurogenic inflammation rather than true inflammatory pathology.

Patient Education

Tibialis posterior tendinopathy requires a gradual loading program and activity modification; sudden cessation of activity can paradoxically worsen symptoms, while progressive strengthening helps restore tendon resilience and prevent recurrence.

Typical Presentation

Site

Medial ankle, along the course of the tendon posterior to the medial malleolus; may extend into the medial foot arch

Quality

Dull ache, throbbing discomfort, or sharp pain on weight-bearing; sensation of instability or 'giving way' at the ankle

Intensity

Mild to moderate (3-6/10) at onset; increases with activity and can become severe (7-8/10) if untreated, often worse after activity than during

Aggravating

Running or sustained walking, uphill activities, jumping, sudden directional changes, prolonged standing, inversion movements, pushing off medial forefoot, increasing mileage rapidly

Relieving

Rest, ice application, elevation, anti-inflammatory medication, supportive footwear or arch support, reduced weight-bearing activities

Associated

Excessive foot pronation, flat foot or fallen arches, medial ankle swelling, stiffness after rest, weakness in plantarflexion and inversion, pain with single-leg stance or heel walking, functional instability

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

Single Leg Heel Rise Test

Procedure

Ask the patient to stand on the affected leg, with a fingertip on the wall for balance, and rise onto the toes several times. Watch the heel from behind.

Positive Finding

Pain behind the medial malleolus, difficulty rising, or the heel fails to swing inwards (invert) as the patient rises.

Interpretation

A key functional sign of tibialis posterior dysfunction. Being unable to do a single heel raise, or a heel that does not invert, suggests a more advanced stage and needs podiatry or orthopaedic assessment. Note: the single-leg heel rise is a useful functional sign of tibialis posterior insufficiency, but the previously cited work concerns biomechanics/balance, not diagnostic accuracy; no validated sensitivity/specificity exists.

Sources

No accuracy study

Tibialis Posterior Palpation (Medial Malleolus Groove)

Procedure

Palpate the tendon behind and below the medial malleolus and along its course to the navicular, comparing with the other side. Ask the patient to invert the foot to make the tendon easier to find.

Positive Finding

Tenderness, swelling or thickening along the tendon.

Interpretation

Supports tibialis posterior tendinopathy. Swelling along the tendon with a flattening arch suggests progressive dysfunction. Ultrasound or MRI can assess the tendon.

Sources

Not a diagnostic test

Navicular Drop Test

Procedure

Patient seated with the foot flat and the subtalar joint in neutral. Mark the navicular tuberosity and measure its height from the floor, then measure again in relaxed standing. Compare sides.

Positive Finding

A larger drop than on the other side.

Interpretation

Describes how much the arch lowers under load and helps track change over time. Not a diagnostic test. Note: the navicular drop test quantifies foot pronation as a risk factor; it is not a validated diagnostic test, and the previously cited source did not support the figures shown.

Sources

No accuracy study

Arch Height (Sitting vs Standing)

Procedure

Compare the height of the medial arch in sitting and in standing, visually or by measurement, and compare with the other foot.

Positive Finding

The arch drops clearly more on the affected side in standing.

Interpretation

A flattening arch on one side, especially if it is new, supports tibialis posterior dysfunction. A rigid flat foot that does not re-form on tiptoe needs specialist assessment.

Sources

No accuracy study

Resisted Inversion (Tibialis Posterior)

Procedure

Patient seated with the foot in plantarflexion. Ask the patient to turn the foot inwards against your resistance, and compare with the other side.

Positive Finding

Pain along the tendon, or weakness compared with the other side.

Interpretation

Loads the tendon and supports it as the pain source. Weakness guides strengthening.

Sources

No accuracy study

Too Many Toes Sign

Procedure

Patient standing relaxed. Look at both feet from directly behind and count the toes visible on the outer side of each foot.

Positive Finding

More toes visible on the outer side of the affected foot than on the other side.

Interpretation

Shows the forefoot has swung outwards (abducted) as the arch collapses, a sign of more advanced tibialis posterior dysfunction. Compare sides rather than counting a set number.

Sources

⚠ Red Flags

  • •Acute severe pain with swelling suggesting complete tendon rupture
  • •Progressive neurological symptoms (numbness, tingling in foot or toes)
  • •Signs of deep vein thrombosis (unilateral calf swelling, warmth, deep-vein tenderness). Homan's sign is unreliable (sensitivity roughly 10-54%, specificity roughly 39-89%) and must not be used to include or exclude DVT
  • •Systemic inflammatory disease markers or fever
  • •Trauma with inability to bear weight or severe deformity
  • •Skin changes, colour changes, or signs of infection around the ankle

⚡ Yellow Flags

  • •Psychosocial stress or anxiety about prognosis, particularly fear of permanent disability
  • •Catastrophic thinking about running/activity inability
  • •Depression or mood disturbance affecting recovery motivation
  • •Workplace or sport-related pressure to return to activity prematurely
  • •Somatization or multiple concurrent pain complaints
  • •Poor health-related quality of life or significant functional limitation
  • •Maladaptive pain behaviors or medication misuse

Osteopathic Techniques

First-line care is non-invasive: orthoses or an ankle-foot orthosis, NSAIDs and physical therapy, with success rates of 67–90% in studies. Exercise leads: in a trial of early-stage tendinopathy, eccentric strengthening added to orthoses and stretching gave the most improvement, though a review found few high-quality trials. No trials of osteopathic techniques were found.

Region

Tibialis posterior, medial tibia and flexor retinaculum

Technique

Soft tissue, calf and lower legNo trials found

Rationale

Calf and lower-leg soft tissue is usually given alongside a loading or stretching programme.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the calf (gastrocnemius and soleus), the Achilles tendon and the peroneal and tibial muscles of the lower leg. In trials it was given alongside exercise, such as eccentric calf loading.

Evidence in Tibialis Posterior Tendinopathy

Searched 25 Oct 2026: no trials of lower-leg soft tissue in tibialis posterior tendinopathy.

Region

Talocrural and subtalar joints

Technique

Articulation, ankle and footNo trials found

Rationale

Gentle glides of the toe, midfoot and ankle joints to restore foot mobility.

How it's done, cautions & evidence

How it's done

Passive, rhythmic, low-velocity glides of the ankle (talocrural), subtalar, midfoot and toe joints, within or up to the end of the available range, often aimed at restoring ankle dorsiflexion.

Cautions

Before mobilising an acute ankle injury, check for fracture with the Ottawa ankle rules (tenderness over either malleolus), and palpate the base of the 5th metatarsal, the navicular and the midfoot for a Lisfranc injury.

Evidence in Tibialis Posterior Tendinopathy

Searched 25 Oct 2026: no trials of ankle or subtalar mobilisation in tibialis posterior tendinopathy.

Region

Gastrocnemius-soleus (calf)

Technique

Muscle energy, calf (gastrocnemius and soleus)No trials found

Rationale

Calf muscle energy technique to ease gastrocnemius-soleus tightness that limits ankle dorsiflexion.

How it's done, cautions & evidence

How it's done

The calf is taken to its barrier by dorsiflexing the ankle. The patient pushes the foot gently down, at about 10–20% effort, against resistance for 5–10 seconds, relaxes for 3–5 seconds, and the new barrier is taken up.

Cautions

Not used with an acute fracture, a joint infection or a bone malignancy; take care with severe osteoporosis or after surgery that limits muscle contraction. Use the least force needed: too much can tear a muscle or pull off a tendon, especially in older patients.

Evidence in Tibialis Posterior Tendinopathy

Searched 25 Oct 2026: no trials of calf muscle energy technique in tibialis posterior tendinopathy.

Region

Plantar fascia and medial arch

Technique

Soft tissue, foot and ankleNo trials found

Rationale

Soft tissue to the plantar fascia, foot muscles and the tissues around the toe joints and ankle ligaments.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the plantar fascia, the small muscles of the foot and the tissues around the heel and the ankle ligaments.

Evidence in Tibialis Posterior Tendinopathy

Searched 25 Oct 2026: no trials of plantar foot soft tissue in tibialis posterior tendinopathy.

Sources

Region

Medial foot and plantar tender points

Technique

Counterstrain, foot and ankle tender pointsNo trials found

Rationale

Gentle indirect technique: tender points in the foot and ankle are eased by passive positioning.

How it's done, cautions & evidence

How it's done

Find a tender point in the foot, ankle or calf. Passively move the foot and ankle into the position where the tenderness and tissue tension ease most, and hold it for about 90 seconds while monitoring the point. Return slowly to neutral and re-check.

Cautions

Do not use over an acute fracture, or in a patient who cannot give feedback.

Evidence in Tibialis Posterior Tendinopathy

Searched 25 Oct 2026: no trials of counterstrain in tibialis posterior tendinopathy.

Rehabilitation Exercises

Ankle Plantarflexion and Inversion Active Range of Motion

Range of MotionBeginner

Gastrocnemius and Soleus Calf Stretch (wall or prone)

StretchingBeginner

Plantar Fascia and Foot Arch Stretch (using foot roller or towel curl)

StretchingBeginner

Seated Ankle Inversion Against Resistance Band

StrengtheningBeginner

Seated Ankle Plantarflexion Against Resistance Band

StrengtheningBeginner

Eccentric Heel Lowering (standing on step, rise on both feet, lower on affected side)

StrengtheningIntermediate

Single-Leg Stance on Firm Surface

StrengtheningIntermediate

Single-Leg Balance on Unstable Surface (foam pad or balance board)

BalanceIntermediate

Proprioceptive Training: Tandem Walking or Tight-Rope Walking Pattern

BalanceIntermediate

Arch Activation and Short Foot Exercise

PosturalBeginner

Standing Calf Raises on Both Legs, Progressing to Single-Leg

StrengtheningIntermediate

Stationary Cycling or Swimming (low-impact cardio maintaining fitness during recovery)

CardiovascularBeginner

Referral Criteria

  • •Acute complete rupture of tibialis posterior tendon presenting with severe swelling, deformity, and inability to bear weight
  • •Signs of compartment syndrome (excessive pain, swelling, pain with passive stretch, paresthesia, pulselessness, pallor)
  • •Persistent pain or functional decline despite 6-8 weeks of conservative management
  • •Imaging findings (ultrasound or MRI) confirming significant structural damage or complete tear
  • •Development of posterior tibial tendon dysfunction with progressive foot deformity (pes planus, valgus alignment)
  • •Suspected secondary pathology (stress fracture, subtalar joint pathology, tarsal tunnel syndrome)
  • •Systemic inflammatory conditions requiring rheumatological assessment
  • •Neurological symptoms suggesting nerve compression or entrapment
  • •Recurrent ankle instability or mechanical giving way requiring orthopedic evaluation