How to Prevent Shin Splints in Runners

If your shins ache during the first mile of every run, you're not alone. Medial tibial stress syndrome — what most people call shin splints — is the most common overuse injury in distance runners and the fastest way to lose an entire season.

What shin splints actually are

Shin splints are micro-injuries to the connective tissue along your tibia. They happen when your bones, muscles, and tendons can't recover from the load you're putting on them. The pain usually starts as a dull ache, gets worse during runs, and eventually shows up while walking up stairs.

The 4 real causes

• Mileage jumps. Adding more than ~10% per week is the most reliable predictor.
• Hard surfaces. Concrete loads the tibia ~30% more than a track or trail.
• Weak hips and calves. Tired stabilizers force the lower leg to absorb everything.
• Worn-out shoes. After about 400 miles, midsole foam stops protecting you.

The prevention plan that actually works

You don't need 90 minutes of prehab. You need a few things repeated daily.

• Calf raises: 3 sets of 15, every other day. Slow on the way down.
• Tibialis raises: toes up against a wall, 3 sets of 20.
• Hip bridges: 3 sets of 12 before runs.
• Cap weekly mileage jumps at ~10%.
• Replace shoes every 350–450 miles.

When to back off

Pain that gets worse during a run, or pain that lingers more than 24 hours after, is your tibia telling you it can't keep up. Switch to bike or pool runs for 5–7 days. Don't run through it — stress fractures live one step past shin splints.

Stridely tracks the daily signals behind this issue — readiness, sleep, stress, pain — so you catch it before it derails your season.