The Vastus Medialis Oblique

A lot of people with kneecap instability can improve their knees through strengthening their quads, specifically their Vastus Medialis Oblique (VMO).



The VMO is the teardrop-shaped muscle on the inside of your thigh. It helps keep your kneecap centered in its groove, making it an important muscle for people with patellar instability. A strong VMO can help combat conditions like patellofemoral pain syndrome and patellar maltracking. So, here’s a list of my five favorite exercises for knee instability.

🦵🏽 Best Knee Stability Exercises 🦵🏽

Knee stability is not just about making the VMO stronger. It is also about teaching the hip, knee, and ankle to control alignment while you bend, straighten, balance, and absorb force.

That is why a good program can include both isolated quadriceps work and functional single-leg exercises. The best movement is the one you can perform with control and progress without creating a major flare-up.

#3 — Quarter Squats

Quarter squats are a great exercise to strengthen your quadriceps, including the VMO. Stand with your feet shoulder-width apart, lower into a shallow squat, then slowly return to standing. Start with bodyweight and add resistance as tolerated. Aim for 3 sets of 15 controlled reps within a comfortable range.

Why it makes the list: after a couple reps you’ll know why this is a great exercise for kneecap instability. Your quads and VMO’s will be quivering

#2 — Dumbbell Step-Ups

Dumbbell step-ups strengthen your quads and glutes while challenging your balance and single-leg control. Hold a dumbbell in each hand and place one foot on a sturdy, low step. Push through that foot to lift yourself up, then slowly lower back down, keeping your knee aligned with your toes. Start with bodyweight and add dumbbells as tolerated. Aim for 3 sets of 10 reps per leg.

Why it makes the list: It strengthens your quads and glutes one leg at a time while improving balance and control.

#1 — Petersen Step-Downs

Stand on a low step with one foot near the edge and its heel slightly raised. Slowly bend your supporting knee to lower your opposite heel toward the floor, then push back up. Keep the movement controlled and your knee aligned with your toes.

Why it makes the list: It strengthens your quads while building single-leg control for movements like walking downstairs.

Thanks for Reading!

Whether you’re dealing with patellar instability yourself or just want to better understand your knees, I’m glad you’re here.

The goal of The Patellar Tracker is to educate, build community, and enable people to stay active while creating a lasting impact for those with patellar tracking disorder.

I’m excited to have you along for the journey.