You’ve probably heard about knee valgus, aka “knock knees“, i.e knees caving inward towards big toes.
Valgus refers to the tibia (shin bone) leaning inward towards the big toe. See pic on the far right, above.
If you had my education, the thought of letting your knees go valgus makes you throw up in your mouth a bit. Even the word “valgus” kinda sounds gross, doesn’t it??
Most of us have been indoctrinated with the belief that valgus is bad, and causes knee pain, and you’re not going to biomechanical heaven if your knees go in (because biomechanics are a moral issue, didn’t you know?).
While there is truth that valgus knees may not be optimal for an individual, it is not an inherently “bad” movement, and there is a time and place we need it. Like, when our knees bend while we walk (more on that coming up).
But what about someone stuck in knee VARUS?
A knee that pushes out (varus) at the wrong time, place, and magnitude can be just as problematic as a knee that leans in. So this blog post is dedicated to my journey restoring healthy knee valgus into my life.
Why so much focus on preventing knee valgus?
When I was in my early twenties, a young and naiive personal trainer learning about exercise technique, I thought letting your knee go inward was BAD.
I remember consciously walking up stairs pushing my knees out. This made me feel morally superior to all the knee-valgusing, biomechanically not “woke” gym-goers who were obviously going to ruin their knees, and their lives.
Well… I’ve changed my mind about that.
Because I have a right knee stuck with a varus angle that is giving me trouble, and I’ve found some useful movements to *gasp* help it go into valgus.
But first…
What should your knees be doing, ideally, when you walk?
Here’s the ideal mechanical relationship we should see in gait (normal walking) at your knees:
- Knee bends (flexion) = tibia rotates in towards big toe (goes toward valgus from upright)
- Knee straightens (extension)= tibia returns back upright (moves toward varus from valgus)
Think of it like a pendulum going from one end of the spectrum to the other: Varus–> center –> valgus –> center–> varus, and on and on and on…
At the risk of going too far down a biomechanical rabbit-hole, if you just want to move and feel better without hurting your brain about it, here’s the kneed to know (see what I did there??):
If your knee bends and goes valgus, but then stays that way when you extend it again, no bueno.
However, a knee that doesn’t get into valgus when you bend it, i.e. stays in varus, is also no beuno.
Below is a video of me walking on June 8th, 2022. Watch my right tibia. Can you see how it stays more varus than my left? That’s the side I have hip, SIJ, and foot issues.
Now, in the spirit of movement detectivery, we ought to assess what actually happens when YOU bend and straighten your knees.
World’s simplest knee assessment
You can easily assess whether your knees are going into varus or valgus with a simple lunge test. Try it out, it will take you 1 min:
So… What did you observe about your lunge assesment?
Does one, or both knees push out over your pinky toe (varus)? Then you might like to show your knees an experience of valgus.
Does one, or both knees collapse wayyy inward, and you feel wobbly, and the outside edge of your foot lifts off the floor? That may be too much valgus, and that’s not the topic of today’s exploration.
In a perfect world, we’re looking to see the tip of your knee cap point in towards yoru big toe, but the tibia remain relatively vertical, not push out, not way in, when you bend your knee.
In fact, the knee tipping inward we want to see ought to be more by virtue of the ribia rotating inwards, like a barber pole, not like the leaning otwer of Pisa falling over.
If you had one or both knees pushing OUT into varus, check out the next three videos. They may help you explore some new, exciting valgusing.
Reclaim your valgus
DISCALIMER: The following three videos show what I’ve personally been working on to intentionally, and gently, give my right knee the experience of valgus again. They may or may not feel right for You. If anything feels unsafe or incorrect for you, please don’t force your body to do these movements.
STEP 1: Gently guide the knee into valgus and flexion, non-weightbearing
STEP 2: Start to weightbear into leg with valgus
STEP 3: Fully weightbearing on a healthy valgus knee
As always, we want to introduce new movement, like knee valgus, respectfully, not forcefuly pushing our knees in at 11/10 intensity. I’m using about 10% total body effort.
Give these assessments and movements a go if it feels right for your body, and let me know what you experience 🙂
I originally posted these videos on my Instagram page. I know… social media is the devil. But I sometimes post things there when I’ve discovered something useful in my biomechanical detectivery that I feel worth sharing, in the chance it may be of some small benefit to you as well 🙂 Find me on IG @monvolkmar
Want to learn more about knees (and your whole body) in gait?
If you enjoy my style of biomechanical exploration, I invite you to dive in deeper in my online course Liberated Body.
This is a 4 lesson movement workshop that guides you through how your body moves, and helps you identify and restore the joint motions your body is missing from your gait cycle that could be keeping you from moving, performing and feeling your best.
On day 2 (foot day) we talk more about how the knees should ideally move in harmony with the feet, i.e.- The importance of being able to pronate and supinate well.
Come join Movement Detective School, if you dig it.
