What it is
Medial Tibial Stress Syndrome (MTSS) — pain along the inner edge of the shinbone caused by stress on the connective tissue attaching muscles to the tibia. Accounts for up to 16% of all running injuries.
Classic sign: Diffuse, dull ache along the middle to lower inner shin during and after running. Tender to touch. Eases with rest, returns when training resumes.
Common causes
- Rapid increase in mileage or intensity
- Running on hard surfaces
- Overpronation (feet rolling inward)
- Tight or weak calf muscles
- Worn-out or inappropriate footwear
- Weak hips and glutes causing poor alignment
Treatment
- Reduce mileage significantly — run on softer surfaces
- Ice the shin for 15 min after running
- Increase your cadence to reduce ground impact
- Calf and shin stretches twice daily
- Hip and glute strengthening
- Rest completely if pain is felt at rest
⚠️ Stress fracture warning: If pain is sharp and localised to one small spot (rather than diffuse along the shin), worsens during running and doesn't ease with rest, see a doctor. This may indicate a stress fracture which requires imaging to diagnose and full rest to heal.
Coach Rak says: "The metronome is your best friend here. Increasing cadence by just 5% reduces tibial stress significantly. Use it at track on Monday nights and you'll notice the difference quickly."
Rehab exercises
Toe taps
Sit on a chair, keep heels on the floor, repeatedly tap toes up and down as fast as comfortable.
3 × 30 reps, daily
Calf raises (bilateral)
Stand with feet flat, rise onto tiptoes slowly, lower slowly. Use a wall for balance.
3 × 15 reps, daily
Shin stretch
Kneel on a soft surface, tops of feet flat on floor. Gently sit back onto your heels.
3 × 20 sec, twice daily
Glute bridge
Lie on back, knees bent, feet flat. Push hips toward ceiling, squeeze glutes at top.
3 × 15 reps, daily
Single leg balance
Stand on one leg for 30–60 seconds. Progress by closing your eyes or standing on a folded towel.
3 × 30 sec each leg, daily
Hip abduction (side-lying)
Lie on your side, keep hips stacked. Lift top leg to about 45°, lower slowly.
3 × 15 reps each side, daily