Shin splints (the proper name is medial tibial stress syndrome) are the single most common complaint we hear from new runners. About 20 per cent of beginners get them in their first three months, usually in week four or five, right when training is starting to feel good and people start adding miles too quickly.

This is the beginner's guide to spotting them, fixing them, and making sure they don't come back. We'll cover what they actually are, why they happen, the recovery protocol that works, and the four changes that stop them returning.

What Are Shin Splints?

Shin splints are an overuse injury affecting the inside edge of your shin bone (the tibia) and the muscles that attach to it. When the load on that area builds faster than your bones, tendons and connective tissue can adapt, the area becomes inflamed and tender. You'll feel it as a dull ache that runs along a stretch of bone, usually on the inside of the leg, sometimes both legs.

The important thing to understand is what they're not. They're not a stress fracture (a stress fracture hurts in a single spot the size of a coin and gets dramatically worse with running). And they're not a muscle pull. They're a tissue overload signal, and they respond very well to a few specific changes.

Why You're Getting Them

Shin splints are almost always caused by one of four things, and usually a combination. Find your culprit and you've found your fix.

1. Too Much, Too Soon

The biggest cause by a long way. Bones and connective tissue adapt slower than muscles. Your legs feel ready to do more, but the tibia hasn't caught up. The classic pattern is a beginner running 10 km in week one, jumping to 20 km in week two, and complaining about shins in week three.

2. Hard Surfaces

Concrete is roughly 10 times harder than tarmac, and tarmac is harder than the grass or a treadmill belt. If all your runs are on pavement, that's a big repetitive load through the same tissue.

3. Worn-Out Shoes

Most running shoes give you 500 to 800 km of useful cushioning. After that the foam is dead even if the upper looks fine, and your shins absorb everything the shoe used to.

4. Weak Calves and Hips

If your calves can't absorb the impact of each footstrike, the shin takes it. If your hips can't control your knee tracking, the shin takes that too. This is why runners who lift get fewer of these injuries.

The 7-Day Recovery Protocol

If you've got mild shin splints (achy after running, gone within an hour), you can usually keep training while you recover, you just need to change what you're doing.

• Days 1-3: No running. Cycle, swim or row instead. Ice the painful area for 15 minutes after any activity.
• Days 4-5: One easy 20 minute run on grass or treadmill. If pain stays below 3 out of 10 during the run and disappears within an hour, you're good to continue.
• Days 6-7: Back to easy running, capped at 50 per cent of your previous weekly mileage. Add calf raises (3 sets of 15) and single-leg balance work daily.
• Week 2 onwards: Build back by 10 per cent per week. Don't skip the calf and hip work, that's what stops them coming back.

If pain is sharp, localised to one spot, or wakes you up at night, see a physio. That's stress fracture territory, not shin splints, and it needs proper imaging.

The Four Changes That Stop Them Coming Back

The Bottom Line

Shin splints aren't a sign you're not built for running. They're a sign that load is outpacing adaptation, and that gap is fixable. Slow the build. Switch up the surface. Strengthen the muscles that should be sharing the load. Replace your shoes before they kill you.

Get those four right and you'll spend a lot more time running and a lot less time icing.