Almost every runner I work with has a story about an injury that took them out of training. A sore knee that turned into three weeks off. A "little tightness" in the shin that wouldn't go away. Most of them say the same thing afterward: "I wish I had listened sooner."
I'm Coach Asher, and as a physical therapist and strength coach, I've spent years helping runners understand what their bodies are telling them. In this guide, I'll walk you through the common running injuries I see most, what usually causes them, the warning signs worth paying attention to, and how to lower your risk. Think of it as a conversation we'd have after a run.
Why Do Runners Get Injured?
Running is repetitive. Every mile asks the same muscles, tendons, and bones to absorb force again and again. When your body adapts to that stress, you get stronger. When the stress outpaces your body's ability to recover, something starts to complain.
Here's what I see behind most running injuries:
Too much, too soon. A sudden jump in mileage, speed, or hills is the most common culprit.
Not enough recovery. Poor sleep, high life stress, and back-to-back hard days leave little room to adapt.
Gaps in strength. Weak hips, glutes, calves, or core make other tissues work harder than they should.
Limited mobility. Stiff ankles or hips can change how you move, and that changes where the load goes.
Worn or unsuitable shoes. Shoes aren't magic, but they do matter, especially when they're past their useful life.
Ignoring early signals. Small aches rarely stay small if you keep pushing through them.
Notice that most of these are training and recovery decisions, not bad luck. That's good news, because it means you have more control than you think.
The Most Common Running Injuries
Here's a quick overview, followed by a closer look at each one.
| Injury | Where You Feel It | Common Trigger |
|---|---|---|
| Runner's knee | Around or behind the kneecap | Weak hips or quads, sudden mileage jumps |
| Shin splints | Along the inner shin | Rapid increases in volume, hard surfaces, new routines |
| IT band syndrome | Outside of the knee or hip | Weak hip stabilizers, lots of downhill running |
| Plantar fasciitis | Heel or bottom of the foot | Tight calves, stiff feet, sudden load changes |
| Achilles tendinopathy | Back of the heel or lower calf | Speedwork, hills, calf weakness |
| Stress fractures | A specific spot on a bone | Too much load without enough recovery |
| Hamstring strain | Back of the thigh | Fast running, fatigue, poor strength balance |
Runner's Knee
This is that dull ache around or behind the kneecap. It often shows up on stairs, after long sits, or on downhills. In my experience, it's rarely just a "knee problem." Hip and quad strength usually play a big part, so the fix often starts above and below the knee.
Shin Splints
Shin splints feel like a sore, achy line along the inner edge of your shin. They love to appear when a runner increases mileage quickly, returns from a break too enthusiastically, or starts adding speed work. The shin needs time to adapt, and it usually tells you when it hasn't had enough.
IT Band Syndrome
You feel this one on the outside of the knee, and sometimes along the outer hip. It often builds slowly during a run, then eases once you stop. Weak hip stabilizers and a lot of downhill or cambered-road running are common contributors.
Plantar Fasciitis
Sharp heel pain with your first steps in the morning is the classic sign. Tight calves, stiff feet, and sudden changes in training load often sit behind it. The foot is the foundation, so it's worth building strength there too.
Achilles Tendinopathy
Pain or stiffness in the tendon at the back of your heel, especially when you start moving, deserves attention early. Hills and speedwork are the usual triggers, and the Achilles handles a lot of force. Calf strength is a big part of keeping it happy.
Stress Fractures
A stress fracture feels like pain that points to one specific spot on a bone and gets worse as you run. Unlike general muscle soreness, it doesn't warm up and fade. If you have pain like this, please don't run through it. Get it checked.
Hamstring Strain
A tight or tender spot at the back of the thigh, often during faster running or when you're tired. Hamstrings need both strength and gradual exposure to speed, which is why I include both in my athletes' plans.
Warning Signs You Shouldn't Ignore
Not every ache is an injury. Some soreness is a normal part of training. Here's how I help my athletes tell the difference.
Usually okay to monitor:
General muscle soreness that fades within a day or two
Mild stiffness that eases as you warm up
Tired legs after a hard week
Time to pause or adjust:
Pain that gets worse as you run
Pain that changes how you move or makes you limp
Pain that lingers or returns every run
Pain at night or at rest
Pain focused on one specific spot on a bone
Swelling, bruising, or numbness
My rule of thumb is simple: if your form changes because of the pain, it's no longer a "run through it" situation. And if something feels off and you're not sure, I'd rather you check in early than wait. If it needs hands-on care, I'll tell you to see a provider in person.
Injury Prevention for Runners: What Actually Helps
There's no way to guarantee you'll never get injured, and I won't pretend otherwise. But you can stack the odds in your favor. This is how I approach injury prevention for runners.
1. Build Mileage Gradually
Your heart and lungs adapt faster than your tendons and bones. That mismatch is why so many runners feel great and still get hurt. Increase your load steadily, and include easier weeks so your body can catch up.
2. Make Strength Training Non-Negotiable
This is where my background shows up. Strength work helps your body handle the repeated impact of running. I focus on hips, glutes, calves, quads, and core, because these muscles support nearly everything below and above them. Two short sessions a week is a great place to start, and it doesn't need to be complicated.
3. Respect Easy Days
Not every run should be hard. Easy runs build your base and give your body room to absorb the harder work. If every day feels like a push, recovery is probably the missing piece.
4. Warm Up and Cool Down
A few minutes of mobility, dynamic movement, and light activation before a run makes the first mile feel better. A short cool-down and some mobility afterward help you move well the next day.
5. Sleep, Fuel, and Manage Stress
Recovery isn't just what you do after a run. It's what happens while you sleep, eat, and live your life. When those pieces slip, injury risk tends to go up.
6. Rotate and Replace Your Shoes
Choose shoes that feel comfortable for you, and replace them when they're worn out. If you're unsure, a good running store can help you find what suits your feet.
7. Listen Early
The runners who stay healthy aren't the ones who never feel pain. They're the ones who notice it early and adjust. A few lighter days now can save you from weeks off later.
How Coaching Helps You Stay Healthy
Here's what a generic plan can't do: notice when you're tired, stressed, or running through something that isn't right.
At Dasher Personalized Running, our 1-on-1 coaching is built around your goals, schedule, and recovery. Your plan includes Strength for Runners workouts, mobility routines, and regular feedback, so we can adjust before a small issue becomes a big one. If you're curious how that works day to day, read more about working with an online running coach.
Ready to Train Smarter and Stay Healthy?
If you're tired of guessing, or you're coming back from an injury and want to rebuild with confidence, I'd love to talk. At Dasher Personalized Running, we'll look at your goals, your running history, and what's been holding you back, then build a plan that supports steady, sustainable progress.
Contact us to start the conversation.
Frequently Asked Questions
1. What are the most common running injuries?
The ones I see most are runner's knee, shin splints, IT band syndrome, plantar fasciitis, Achilles tendinopathy, stress fractures, and hamstring strains.
2. How can I prevent running injuries?
Increase your training gradually, include strength work, take easy days seriously, and prioritize sleep and recovery. Pay attention to early signs of pain instead of pushing through them.
3. Should I stop running if something hurts?
It depends. Mild soreness that fades as you warm up is usually fine to monitor. Pain that worsens, changes your form, or lingers should be taken seriously, and it's wise to have it checked by a provider.
4. Does strength training really help runners avoid injuries?
Strength training helps your body tolerate the repeated stress of running. It's one of the most useful tools I use with my athletes, though no approach can eliminate risk completely.
5. Can a running coach help me return from an injury?
Yes. A coach can help you rebuild gradually based on your history and current capacity. If something needs hands-on care, you should see a healthcare provider as well.