Running with Knee Pain: Should You Stop or Modify?

Hi, I’m Kat – physiotherapist and co-founder of Lake Therapy. If you’re a runner dealing with knee pain, you’ve probably asked yourself, Should I keep going? Should I rest? Or is this the end of my training plan?

Trust me, I hear these questions often—especially when someone is preparing for a race or just getting back into exercise. Pain during movement can be confusing and frustrating, and knowing when to stop (or when to adapt) can feel like guesswork.

In this post, I want to help you understand when running with knee pain is okay, when it’s not, and how we approach it here at Lake Therapy so you can make confident decisions that support both your performance and your health.

What Knee Pain Is—and What It Isn’t

Pain is your body’s way of saying something isn’t quite right. It doesn’t always mean something is damaged, but it does mean something needs attention.

When it comes to running with knee pain, the source of that discomfort matters a great deal. It might be due to:

• A sudden increase in training volume

• Running on uneven or new terrain

• Worn-out shoes

• Poor running mechanics

• Muscular imbalances or stiffness in the hips, core, or ankles

Occasionally, knee pain might also follow a fall or direct blow—in that case, a proper assessment is crucial before returning to running.

When to Stop Running and When to Modify

Not all knee pain means you need to stop running altogether. Often, it’s a sign that something needs adjusting—whether it’s your pace, surface, footwear, or recovery routine.

Here’s a general guide we share with our clients:

Stop running and seek help if:

• The pain is sharp or worsens as you run

• The knee swells or locks after a run

• You feel unstable or like the knee might give way

• You experienced a trauma (like a fall or collision)

Modify your routine if:

• The pain is mild and improves with warm-up

• You notice discomfort after increasing your mileage too quickly

• You’ve recently switched to new shoes or running terrain

• The pain disappears after rest and returns only after certain types of training

The golden rule? Pain that fades with rest and movement can often be managed with adjustments. Pain that persists or worsens needs investigating.

Why Runners Often Develop Knee Pain

The knee is a hinge joint—it bends and straightens with each stride. But it relies on support from above and below: the hip, the ankle, and the core. If any of those areas are weak, tight, or not doing their job, the knee ends up compensating.

That’s why running with knee pain isn’t always about the knee itself. It might actually be about:

• Weak glutes or hip stabilisers

• Limited ankle mobility

• Poor core engagement

• Overstriding or poor foot placement

We often work with runners who feel frustrated that their knee hurts, even though they’ve been careful with training. Once we look at the whole body, we often discover imbalances that have quietly built up over time.

What We Look for at Lake Therapy

When a runner comes to us with knee pain, we do more than just assess the joint. We look at:

• How you run

• How your body moves as a whole

• What your daily routine and training volume look like

• What recovery strategies you’re using

• Any previous injuries or changes in your body

We also test strength, flexibility, and control—not just in the knee, but in your hips, ankles, and trunk. We then create a plan that helps reduce symptoms, rebuild strength and balance, and restore confidence in movement.

The goal isn’t just to treat the pain. It’s to help you keep running—comfortably, consistently, and safely.

So… Is Running with Knee Pain Ever Safe?

It depends on the cause, the intensity, and how your body responds. But I’ll say this: in many cases, running with knee pain can be made safe—with guidance and modification.

One of our clients, Sarah, came to us whilst training for a half marathon. She’d started to feel a dull ache around the front of her knee after long runs. We assessed her stride, adjusted her training load, and introduced glute activation work. Not only did the pain subside within weeks—she also hit a personal best in her race.

The key was not ignoring the pain—but also not overreacting to it.

Let’s Figure Out What Your Knee Is Trying to Tell You

Pain doesn’t always mean stop—it often just means listen. If you’re unsure whether to keep running with knee pain, don’t guess. Let’s get clear on what’s going on and what you can do about it.

You’re always welcome to book your Initial Consultation at Lake Therapy, where we’ll do a full-body movement assessment and put together a plan that supports your goals.

Or, if you’d like to chat things through first, feel free to book a free 15-minute Discovery Call with us. We’ll talk about your symptoms, your training, and what might be contributing to your pain.

We’ll take it step by step—together.

Warmly,
Kat