Shin Splints: Symptoms, Causes & Relief - A Comprehensive Guide
Medial tibial stress syndrome (MTSS), commonly called "shin splints," is an overuse injury causing pain along the posteromedial tibia. It accounts for 10–15% of running injuries and affects dancers, military recruits, and jump-sport athletes.
Symptoms
- Diffuse pain along the distal 2/3 of the medial tibial border (not focal).
- Worsens with activity (running, jumping), improves with rest.
- Tenderness on palpation of the medial tibial crest (≥5 cm length).
- Pain on resisted plantarflexion or hopping.
- No neurologic symptoms (numbness, weakness) — if present, consider compartment syndrome.
Pathophysiology
Repetitive traction of the soleus and flexor digitorum longus on the tibial periosteum → periostitis and microdamage to Sharpey's fibers. Bone stress reaction may progress to stress fracture if loading continues.
Risk Factors
- Training errors: Rapid mileage increase (>10%/week), hard surfaces, worn shoes.
- Biomechanics: Overpronation, flat feet, excessive hip adduction, weak glutes/calves.
- Anatomy: High arches (less shock absorption), leg length discrepancy.
- Footwear: Inadequate support/cushioning; wrong shoe type for foot mechanics.
- Female sex: Higher incidence (pelvic width, hormonal effects on bone).
Differential Diagnosis
| Condition | Distinguishing Features |
|---|---|
| Tibial stress fracture | Focal tenderness (<2 cm), night pain, positive hop test, MRI/BS positive |
| Chronic exertional compartment syndrome (CECS) | Tight, bursting pain at predictable exercise duration; normal at rest; elevated compartment pressures |
| Popliteal artery entrapment | Calf pain, pallor, pulselessness with plantarflexion; vascular studies |
| Peripheral neuropathy | Burning, numbness, stocking distribution; not mechanically provoked |