Overview
Shin splints (medial tibial stress syndrome) is a common exercise-related condition causing pain along the inner border of the shinbone (tibia). It is an overuse injury affecting the muscles, tendons, and bone tissue around the tibia. It is particularly common in runners and military recruits who have recently increased their training.
How common is it?
Shin splints affect approximately 10 to 15% of all runners and up to 35% of military recruits. It is one of the most common running injuries, particularly in novice runners.
Causes and risk factors
Repetitive mechanical stress on the tibia from running or jumping exceeds the bone and soft tissue's ability to remodel, causing inflammation and microdamage.
Common risk factors
- Sudden increase in running mileage, intensity, or frequency
- Running on hard or uneven surfaces
- Flat feet (overpronation) or high arches
- Worn-out or inappropriate footwear
- Female sex (higher risk due to lower bone density and biomechanical differences)
- Low bone density
- Poor running technique
- Muscle imbalance or weakness
Symptoms
- Pain along the inner lower two-thirds of the shin, worse with activity
- Tenderness on pressing along the inner shin border
- Mild swelling in some cases
- Pain at the start of exercise that may ease with warm-up, then return after exercise
- In severe cases, pain persists at rest and at night (which may indicate stress fracture — needs imaging)
When to see a doctor
See a doctor if pain is severe, constant, or occurs at rest. Pain in a specific point on the shin rather than diffuse tenderness requires imaging to exclude a stress fracture.
Diagnosis
Clinical diagnosis in most cases. X-ray to exclude stress fracture or tibial pathology. MRI is the gold standard for distinguishing shin splints from tibial stress fracture.
Treatments
Relative rest and load reduction
Reduce or temporarily stop running. Cross-training with swimming or cycling maintains fitness without tibial loading. Gradual return to running only after pain-free during daily activities.
Ice and NSAIDs
Ice packs applied to the shin for 15 to 20 minutes after activity reduce inflammation and pain. Ibuprofen or naproxen for 5 to 7 days for acute episodes.
Running gait retraining and strengthening
Physiotherapy to correct overpronation, improve hip and ankle strength, and modify running technique reduces tibial loading. Custom orthotics for significant foot mechanics issues.
Self-care and lifestyle
- Increase running mileage by no more than 10% per week (10% rule)
- Replace running shoes every 500 to 600 miles
- Vary running surfaces — avoid exclusively hard surfaces
- Include rest days in training schedules to allow bone remodelling
Prevention
Gradual training progression, appropriate footwear, addressing foot mechanics, and adequate calcium and vitamin D intake (particularly in women) reduce shin splint risk.