Knee pain doesn’t just come from “bad knees.” More often than not, it comes from how the muscles around the knee are working together—or failing to. Two of the most important muscles in this equation are the vastus lateralis (VL), the strong outer quad muscle, and the vastus medialis oblique (VMO), the stabilizer on the inner thigh just above the knee.
When the VL dominates and the VMO isn’t doing its job, the kneecap doesn’t track properly. Over time, that can cause nagging pain, stiffness, and even long-term damage to the joint. The good news? There’s a simple test you can do at home to see if you’re at risk.
How to Perform the Seated Knee Tracking Test
Sit on the floor or on a firm surface with your legs extended in front of you.
Place your hand gently above your kneecap so you can feel its movement.
Press the back of your knee firmly into the floor—this contracts the quadriceps.
Watch the kneecap as it moves upward toward your hip.
What the Results Tell You
✅ Good tracking: If the kneecap moves in a straight line up toward your hip, your VL and VMO are in balance.
⚠️ Poor tracking: If the kneecap pulls outward instead of straight up, that usually means the VL is tight and/or the VMO is weak.
This imbalance may not cause pain immediately, but over time it can wear down the joint, especially during activities like walking, running, or climbing stairs.
Next Steps if Your VL Is Tight or VMO Is Weak
Failing the test doesn’t mean you’re stuck with knee pain—it simply means you’ve found the problem. Here’s how to start addressing it:
Release and stretch the outer thigh to loosen the VL. Foam rolling, massage, or targeted stretches work well.
Activate and strengthen the VMO with controlled movements like straight leg raises (with a quad squeeze), terminal knee extensions, or step-downs focusing on knee alignment.
The combination of release and activation restores balance and helps the kneecap glide properly again.
Watch the Knee Tracking Test in Action 🎥
Take Control of Your Knee Health
Healthy knees aren’t just about avoiding pain today—they’re about protecting your joints for years to come. A few minutes of testing and corrective work now can save you from bigger problems later.
Want help figuring out exactly what’s going on with your knees? Schedule your free virtual evaluation today.
Your knees deserve to move the way they were designed—smooth, strong, and pain-free.
