Knee pain has a way of taking the joy out of running very quickly. One minute you’re feeling proud of yourself for getting out the door, and the next you’re doing that slightly panicked mental maths of: Is this a normal ache? Am I damaging something? Should I stop?
I’ve been there. And because I’m juggling running with family life (Steve, my husband, and our lively 3.5 year old daughter), I’m not interested in “perfect” training plans that only work if you have endless time and zero interruptions. I’m interested in realistic fixes: the kind you can actually do between nursery runs, dinner, and the general chaos of everyday life.
A quick but important note: I’m not a medical professional. This post is based on my own experience and the general guidance I’ve found helpful. If your pain is severe, sudden, getting worse, or you’re limping, it’s always worth speaking to a qualified physio or GP.
First: what kind of knee pain are we talking about?
“Knee pain” is a broad label. For runners, it often shows up in a few common places:
- Front of the knee (around/behind the kneecap) – often linked to patellofemoral pain (sometimes called “runner’s knee”).
- Outside of the knee – can be linked to IT band irritation.
- Below the kneecap – sometimes linked to patellar tendon irritation.
- General ache inside the joint – can be lots of things, and it’s worth getting checked if it persists.
If you’re unsure what you’re dealing with, this NHS page is a sensible place to start for red flags and general guidance.
The most common reasons knees hurt when you run
In my experience (and from what I’ve read over the years), knee pain in runners is often less about one single “broken” thing and more about a few factors stacking up.
1) Doing too much, too soon (training load)
This is the big one. If you increase distance, speed, hills, or frequency too quickly, your body doesn’t have time to adapt.
A very normal scenario looks like this:
- You start running and feel great.
- You add an extra day (because motivation is high).
- You add a bit of distance (because you’re improving).
- Then your knees start complaining.
I’ve learned (the hard way) that progress is meant to feel almost boring. Slow increases are what keep you running.
2) Weak glutes/hips (your knees doing extra work)
This one surprised me when I first heard it: knee pain can be linked to what’s happening above the knee.
If your glutes and hip stabilisers are weak or not firing properly, your knees can end up taking more of the load, especially when you run downhill, turn corners, or get tired.
I noticed this most when I was trying to squeeze runs in around family life. If I’d been sitting on the floor playing with my daughter, then suddenly dashed out for a run without any warm-up, my hips felt stiff and my knees felt it.
3) Worn-out shoes (or shoes that don’t suit you)
I’m not saying you need to buy the most expensive trainers on the shelf. But shoes that are past their best can contribute to discomfort.
Things I look for now:
- The midsole feels “flat” compared to when they were new.
- I’m getting niggles that I didn’t have before.
- The tread is uneven.
If you’re unsure, a running shop gait assessment can be useful — not because it’s magic, but because it gives you a starting point.
4) Running form and overstriding
Overstriding is when your foot lands too far in front of your body. It can increase braking forces and load through the knees.
I’m not obsessed with form (I don’t think beginners need to overthink it), but a couple of cues helped me:
- Shorter, quicker steps (often called cadence)
- Think “run tall” rather than leaning forward from the waist
- Keep easy runs easy so you’re not fighting your body
5) Not enough recovery
Recovery is where your body adapts. Without it, little irritations build up.
This is tricky with a small child because rest doesn’t always mean lying down. Sometimes it means choosing a gentle walk instead of a run, or doing a short mobility session after bedtime rather than pushing through another hard workout.
Simple fixes that helped me (and are worth trying first)
Here’s what I’d do if knee pain popped up again tomorrow.
1) Reduce the load for 1–2 weeks (without stopping everything)
I don’t mean “never run again”. I mean:
- Cut your distance
- Avoid hills and speed sessions
- Keep runs conversational
- Add an extra rest day if needed
If walking is painful too, that’s a sign to get checked.
2) Warm up properly (3–5 minutes is enough)
My realistic warm-up looks like this:
- Brisk walk
- 10 calf raises
- 10 glute bridges (yes, even in the hallway)
- A few leg swings
- Start running slowly
When I do this, I feel less stiff and my knees settle quicker.
3) Add a basic strength routine (2x a week)
This is the biggest “return on effort” change I’ve made.
A simple routine you can do at home:
- Glute bridges – 2 sets of 10–12
- Bodyweight squats (or sit-to-stand from a chair) – 2 sets of 8–10
- Step-ups (stairs are perfect) – 2 sets of 8 each side
- Side-lying leg raises or banded side steps – 2 sets of 10 each side
- Calf raises – 2 sets of 12–15
I often do this while Steve is doing bath time, or while my daughter is “helping” by counting reps (sometimes accurately, sometimes… not).
If you want a reputable, UK-based starting point for exercise and injury prevention info, the Chartered Society of Physiotherapy is a good resource: https://www.csp.org.uk/public-patient
4) Check your running schedule (and make it kinder)
If you’re running three times a week, try:
- Run 1: easy
- Run 2: easy
- Run 3: slightly longer easy
Yes, it’s a lot of easy. But easy running is what builds the base.
5) Look at the surfaces you’re running on
Hard pavements can be unforgiving, especially if you’re doing a lot of running in one go.
If you can, mix it up:
- Park paths
- Trails
- Treadmill (if you have access)
I’m not precious about it — I just notice my body feels better with variety.
Foot support and alignment: when it might matter
This is the part that often gets overlooked. Your feet are your foundation. If your feet are collapsing inwards (overpronation) or you’re lacking support, it can affect how your knees track.
This doesn’t mean you need to panic about your arches. But it can mean that a little extra support makes running feel smoother.
One option some runners try is shoe inserts to adjust comfort and support inside the trainer. If you want to explore that option, you can look at these shoe inserts.
As always, if something increases pain, stop using it and consider getting assessed.
When knee pain is a sign to stop and get checked
I’m all for sensible self-management, but there are times when it’s better to get professional advice.
I’d personally book an appointment if:
- The pain is sharp, sudden, or linked to a specific twist/impact
- Your knee is swollen, hot, or unstable
- You can’t put weight through it properly
- You’re limping
- It’s not improving after a couple of weeks of reduced load + strength work
For urgent symptoms and guidance on when to seek help, the NHS knee pain page above is a good reference.
A realistic “knee pain reset” plan (what I’d do this week)
If you want something simple to follow, here’s a gentle reset plan:
- Week 1: two short, easy runs + two strength sessions
- No hills, no speed, no “testing it” with a fast finish
- Warm up before every run
- Strength focus: glutes + calves
- Review shoes (are they worn out? do they feel stable?)
- Consider shoe inserts if you want extra support
If you’re consistent with this, you’ll usually learn a lot about what your knees tolerate.
Final thoughts
Knee pain can be scary, but it’s also incredibly common — and often fixable with a few sensible changes. For me, the biggest improvements came from slowing down my training progression, adding basic strength work, and paying attention to the small things (warm-ups, recovery, and what my shoes were doing).
And if you’re in the same season of life as me — running around after a 3.5 year old, fitting workouts in where you can, and relying on a supportive partner (Steve has heard a lot about my knees) — please know that consistency doesn’t have to look perfect. It just has to be kind enough that you can keep going.
If you’ve had knee pain while running, what helped you most? I’m always interested in what actually works in real life.”}
