Why Do My Knees Hurt When Running? Causes + How to Fix It

Written by Mitchell Sullivan, Founder of Vital Roots Wellness

If your knees hurt when you run, it usually follows a pretty predictable pattern.

You head out feeling fine. The first part of the run feels normal. Then somewhere along the way—maybe a mile or two in—you start to notice it. A dull ache, a bit of pressure, something that wasn’t there when you started. By the end of the run, it’s more obvious. Later that day, or the next morning, it’s even harder to ignore.

That pattern matters.

Because knee pain while running is rarely random. It almost always comes from the way your body is handling repeated impact, step after step.

By the end of this article, you’ll understand exactly what’s causing that knee pain, what most runners get wrong, and what you can start doing immediately to reduce the stress on your knees so running actually feels better again.

The knee sits between your hips and your ankles. It’s not designed to absorb everything on its own, but it often ends up doing exactly that when something else in the system isn’t working the way it should.

What’s actually happening when your knee starts to hurt

Every step you take while running sends force up through your body. That force is supposed to be shared between your foot, ankle, knee, and hip. When everything is working together, it feels smooth and efficient. When it’s not, the knee takes on more than its fair share.

That’s why two people can run the same distance and have completely different experiences. One finishes feeling fine. The other finishes with knee pain. The difference isn’t luck—it’s how their body is handling that repeated load.

And this isn’t just a knee issue—it’s something a lot of runners notice in different ways. If you’ve ever finished a run and felt stiff or sore in other areas too, Why Do My Joints Hurt After Running? (What’s Actually Causing It) breaks down why that can happen across multiple joints, not just the knees.

And once that load starts exceeding what your knee can comfortably manage, you feel it.

Overstriding puts unnecessary stress directly into your knee

One of the most common mechanical issues behind knee pain is overstriding.

This happens when your foot lands too far in front of your body instead of underneath it. When that happens, each step creates a slight braking effect. Instead of moving forward smoothly, your body is being slowed down and then pushed forward again with every stride.

That braking force has to be absorbed somewhere, and your knee ends up taking a large portion of it.

Early in a run, you might not notice much. But as those forces repeat over hundreds of steps, the stress builds. That’s why knee pain often shows up partway through a run rather than immediately.

A simple adjustment—shortening your stride slightly and focusing on quicker, lighter steps—can reduce that braking force and take pressure off your knee without needing to completely change how you run.

Weak glutes shift the workload onto your knees

Another major contributor is lack of strength and control in your hips, especially your glutes.

Your glutes are responsible for stabilizing your pelvis and controlling how your leg moves when your foot hits the ground. When they’re doing their job well, they help keep your movement controlled and balanced.

When they’re not, your knee ends up compensating.

This often shows up as a subtle lack of stability. You might not feel “weak,” but your knee may drift slightly inward or feel less controlled during your stride. Over time, that repeated lack of control puts additional stress on the joint.

Adding basic movements like lunges, step-ups, or split squats helps restore that balance and takes pressure off your knees.

Tight hips can quietly change how your knee moves

If your hips are tight, they limit how your leg can move through each stride. That restriction might be small, but running amplifies small limitations because of repetition.

When your hips don’t move well, your body finds a workaround. That workaround often changes how force travels through your knee.

This is especially common if you go straight from sitting all day into running. Your hips are stiff, your stride is restricted, and your knee absorbs more of the load.

A short warm-up to loosen your hips before running can make a noticeable difference in how your knees feel during and after.

Your shoes may be contributing more than you realize

Shoes are the first layer between you and the ground, and they directly affect how impact is handled.

If your shoes are worn out, not suited to your foot, or not supporting your stride properly, more of that force travels up to your knee.

The tricky part is that shoes don’t always feel “bad” when they’re the issue. Many runners keep using shoes that feel okay, even though their joints are taking more stress than they should.

If your knees consistently feel sore after runs, your shoes are worth taking seriously.

Doing too much too quickly overloads your joints

This is one of the biggest reasons runners run into knee pain.

Your cardio improves quickly. Your motivation is high. You feel capable of doing more.

But your joints adapt slower than your lungs.

So when you increase distance, frequency, or speed too quickly, you create more stress than your body is ready to handle. At first it’s minor. Then it builds. Then it becomes a pattern.

The key is progression. Let your body adapt to one change at a time instead of stacking everything at once.

Why it often keeps coming back

Knee pain usually isn’t caused by just one thing.

It’s often a combination of:

• mechanics
• strength
• mobility
• training load
• and recovery

Fixing one piece helps, but if others are still off, the knee continues to take excess stress.

That’s why some runners feel like they’ve “tried everything” but still deal with the same issue.

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The Bottom Line

If your knees hurt when you run, it’s usually not because running is bad.

It’s because your knee is taking on more load than it should, repeatedly.

That can come from your stride, your strength, your mobility, your shoes, or how quickly you’ve increased your training.

Once you understand that, the solution becomes much clearer.

Quick Fixes to Try Today

If you want to reduce knee pain right away, these are the most effective starting points:

• Slightly shorten your stride and focus on lighter, quicker steps
• Slow your pace down and reduce mileage for a week to let your body reset
• Add 2–3 simple strength exercises (lunges, step-ups, glute bridges)
• Do a quick hip warm-up before running instead of starting cold
• Take a serious look at your shoes—especially if they’re older or worn out

None of these require a complete overhaul. But together, they can significantly reduce the stress your knees are dealing with.

Where recovery and joint support come in

Even when you clean up your mechanics and training, there’s still another factor most runners overlook:

How well your body is recovering between runs.

Because if your knees stay slightly irritated, every run starts from a worse baseline.

That’s when soreness lingers, stiffness builds, and running starts to feel harder on your joints than it should.

This is where something like Platinum Turmeric Joint Support Plus fits in.  A carefully formulated joint support supplement designed to support your joints from all angels with ingredients like turmeric, glucosamine, ginger and patented black pepper extract for absorption.

It's not a replacement for good habits, but as added support for how your body handles joint stress over time.

And just as important, it’s third-party tested, made in the USA, and built without unnecessary fillers.

That matters when you’re putting real stress on your joints and expecting them to hold up.

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FAQ

Why do my knees hurt more after running than during?
Because stress builds during the run and becomes more noticeable once your body cools down.

Should I stop running if my knees hurt?
Not necessarily. Adjusting how you run and how your body is supported is usually more effective.

Can knee pain from running go away?
Yes, if you address the underlying causes instead of just managing symptoms.

Can supplements help with knee pain from running?
They can support recovery and joint comfort, especially when combined with proper training.

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About the Author
I’m Mitchell Sullivan, founder of Vital Roots Wellness. I’ve developed a strong, deep interest in health, wellness, and long-term mobility through years of personal research and experience. My goal with this blog is to share clear, honest information that helps people better understand their bodies and make more informed decisions about their health.