What shin splints is
Medial tibial stress syndrome is exercise-induced pain along the lower two thirds of the inner border of the shin bone. It is one of the most common running injuries, with incidence in running and military populations reported between 13 and 20 per cent.
It represents a bone stress response, where repeated loading has outpaced the bone's remodelling capacity. That places it on a continuum with tibial stress fracture, which is the same process further along.
Early on, pain appears at the start of a run and eases as you warm up. As it progresses, it persists through the run, then after it, and eventually appears during daily walking. That progression is the signal to take it seriously.
What causes it
The cause is training load rising faster than the bone can adapt. Bone remodelling takes weeks, and a training block that adds volume every single week gives it no opportunity to catch up.
A previous episode is a strong predictor, as is a higher body mass index and greater navicular drop, meaning a foot that flattens considerably under load.
Common contributors
- A rapid increase in running volume, particularly without a planned down week
- A sudden switch to harder surfaces or to hill work
- New footwear, or shoes well past their useful mileage
- Calf weakness and low single-leg heel raise capacity
- Low energy availability or poor bone health, which needs considering in anyone with repeated bone stress injuries
- A previous episode of shin splints
The distinguishing test is simple and worth doing. Run a finger along the inner shin border. Tenderness spread over five centimetres or more suggests medial tibial stress syndrome. Tenderness at one focal point, particularly if hopping on that leg reproduces the pain sharply, suggests a stress fracture and warrants imaging and a period off running. Getting this wrong and continuing to run on a stress fracture is the main risk in this condition.
What the evidence says
Load management is the primary treatment. Reducing running volume to a level that stays below the pain threshold, then rebuilding gradually, is what allows the bone to remodel.
Calf strengthening and improved single-leg heel raise capacity are associated with reduced risk and are a standard part of rehab, since the calf muscles absorb load that would otherwise reach the bone.
Increasing running cadence by around 5 to 10 per cent reduces tibial load per step and has reasonable supporting evidence as a modification during return to running.
Shockwave therapy has some supporting evidence for chronic cases that have not settled with load management, with a few trials showing faster return to running.
Graded return-to-running programmes, structured around walk-run intervals with defined progression rules, outperform an unstructured return.
Recovery timeline
Caught early, when pain only appears at the start of a run, shin splints often settle in three to six weeks with load reduction and calf work. Cases where pain persists through daily walking take considerably longer, commonly three months.
A confirmed tibial stress fracture is a different timeline, typically six to eight weeks off running with a graded return afterwards.
| Stage | ✓ Do this | ✗ Avoid this |
|---|---|---|
| Weeks 1–2 | Reduce running volume below the pain threshold. Cross-train. Start calf strengthening and heel raise capacity work. | Running through pain that is getting worse each week |
| Weeks 2–6 | Progress calf strength. Increase cadence 5–10 per cent. Begin a structured walk-run return. | Returning to the volume that caused it |
| Weeks 6–12 | Build volume by roughly 10 per cent a week with a down week every fourth week. | Adding hills and speed work in the same block as a volume increase |
| If pinpoint tender | Stop running and get imaging to exclude a stress fracture. | Pushing on and hoping a focal point resolves itself |
How we treat it at Kingsway
Treating shin pain
The assessment separates shin splints from a stress fracture and from the less common compartment syndrome, then works out what in your training produced it.
- Palpation along the tibial border and hop testing to screen for stress fracture
- Calf strength and single-leg heel raise capacity measured on both sides
- Training history review to find the load change that triggered it
- Soft tissue release and IASTM through the calf, soleus and tibialis posterior
- Radial shockwave therapy for cases that have not settled with load management
- A structured walk-run return-to-running programme with weekly targets
Three to five sessions across six to twelve weeks is typical, with the emphasis on getting the load progression right between visits. Anyone with a second or third episode should also have bone health and energy availability considered.
When to get it checked
Book an assessment if shin pain has lasted more than two weeks, is present during walking, or has stopped you running. Get seen promptly, and stop running, if the tenderness has narrowed to a single point or hopping on that leg is sharply painful.
See a doctor or go to A&E if
- Pain at a single focal point on the shin bone, with sharp pain on hopping
- Shin pain that persists at rest or wakes you at night
- Numbness, pins and needles or a foot that drops during running, which suggests compartment syndrome
- A shin that feels tight and hard with severe pain during exercise that takes a long time to settle afterwards
- Repeated bone stress injuries, which warrant a review of bone health and energy availability
Common questions
How do I know it is not a stress fracture?
The most useful sign is how spread out the tenderness is. Diffuse tenderness over several centimetres of the shin border is typical of shin splints; one pinpoint tender spot is not.
Sharp pain on hopping on that leg, or pain that persists at rest and at night, both point toward a stress fracture and warrant imaging.
Can I keep running?
Often at reduced volume, provided the pain settles quickly after the run and is not getting worse week to week. Cross-training keeps fitness while the bone catches up.
If pain is present during walking, running should stop until that has resolved.
Do compression socks help?
They give some people symptomatic comfort during and after running, which can be worth having.
They do not change bone loading, so they work as comfort rather than as treatment. The load management and calf strengthening do the work.
Are my shoes to blame?
Sometimes, particularly if you changed shoes shortly before symptoms started or the current pair is well past its useful mileage.
More often the trigger is the training progression rather than the footwear. It is worth reviewing the last six weeks of mileage before buying anything new.