Can the DNS Star Exercise Fix Knee Pain During a Squat?
Squat University breaks down how he helped a patient who couldn't perform a single leg squat without severe left knee pain. Instead of standard glute-strengthening moves, he used the DNS Star, an exercise that trains the core, hips, and pelvis to stabilize together during movement.
Key takeaways
- According to Squat University, knee pain during a single leg squat can stem from poor lateral hip stability rather than a lack of hip or ankle mobility.
- The DNS Star exercise trains the core, hips, and pelvis to work together to create stability while moving, which is essential for controlling the knee during a squat.
- Squat University's patient had excellent hip and ankle mobility but struggled to resist even a small amount of force during a lateral hip stability test.
- Common lateral glute exercises weren't the right fix for this patient because his issue was control over existing mobility, not a strength deficit alone.
- After performing the DNS Star, the patient immediately retested his single leg squat and showed significant improvement with much less pain.
What Causes Knee Pain During a Single Leg Squat?
Knee pain during a single leg squat often comes from a control problem, not a mobility problem. Squat University describes a patient who couldn't perform even a small single leg squat without severe pain in his left knee, and the pain was always worse going down than coming up.
When examined, the patient's left hip and ankle mobility were excellent. But when Squat University tested his lateral hip stability, the patient struggled to resist even a small amount of force. This told Squat University that the knee pain wasn't due to a lack of mobility — it was a problem in controlling the mobility the patient already had.
Why Didn't Standard Glute Exercises Fix the Knee Pain?
Standard lateral glute exercises weren't the solution because the patient's issue was control, not strength alone. Squat University explains that simply making the glutes stronger with common lateral glute exercises wasn't the right approach given what the assessment showed.
Instead, the fix needed to target coordination between multiple structures at once — the core, hips, and pelvis working together to create stability while moving. That's a different demand than isolated glute strengthening, and it's why Squat University chose a different exercise altogether.
How Do You Perform the DNS Star Exercise?
The DNS Star is performed by moving from a side plank into a controlled hip rotation and squat, challenging the core, hips, and pelvis to stabilize together. Follow these steps:
- Start in a side plank position.
- Rotate your pelvis towards the floor, moving into hip internal rotation.
- Slowly squat your hips down.
- Pause for a second at the bottom.
- Return to the start position while keeping your body under control.
According to Squat University, this movement pattern targets the exact factors — core, hip, and pelvic coordination — that are essential for controlling the knee during a squat.
Did the DNS Star Actually Improve the Patient's Squat?
Yes — Squat University reports that after performing the DNS Star, the patient's single leg squat was immediately retested and showed noticeable improvement. In the video, Squat University and the patient both react to how much better the squat looked right after the exercise.
This immediate retest is a practical example of the "test, don't guess" approach Squat University describes in the caption: matching an exercise to a person's specific weak link, rather than defaulting to a generic fix, produced a fast, visible change.
Notable quotes
Could this exercise fix your knee pain?
It's always worse going down than it is up.
This meant his knee pain wasn't likely due to a lack of mobility. It was a problem in control over the mobility he did have.
Test, don't guess.
That's so much better.
Frequently asked questions
What is the DNS Star exercise?
The DNS Star is an exercise that starts in a side plank, moves into hip internal rotation by rotating the pelvis toward the floor, then squats the hips down, pauses, and returns to start. According to Squat University, it challenges the core, hips, and pelvis to work together to create stability while moving, which helps control the knee during a squat.
Why does my knee hurt more going down in a single leg squat than coming up?
In the case Squat University describes, the patient's knee pain was worse going down because of poor lateral hip stability, not a lack of mobility. His hip and ankle mobility tested excellent, but he couldn't resist even a small amount of force during a lateral stability test, meaning he lacked control over the mobility he had, especially in the eccentric (lowering) phase.
Will glute strengthening exercises fix knee pain from hip instability?
Not necessarily — Squat University found that common lateral glute exercises weren't the right solution for a patient whose knee pain came from a control deficit rather than pure weakness. He used the DNS Star instead, which trains coordinated stability across the core, hips, and pelvis rather than isolating glute strength.
How do you test for lateral hip stability like Squat University did?
Squat University tested lateral hip stability by applying a small amount of force to the patient's hip and seeing if he could resist it. The patient struggled to resist even a small amount of force despite having excellent hip and ankle mobility, which pointed to a control issue rather than a mobility restriction as the cause of his knee pain.
Is the DNS Star only for knee pain?
In this video, Squat University applies the DNS Star specifically to fix knee pain linked to poor lateral hip stability and control during a single leg squat. He notes in the caption that the exercise itself isn't inherently special — it worked because it was matched to this patient's specific weak link, following a 'test, don't guess' approach rather than a one-size-fits-all recommendation.
Full transcript
0:00Introducing the patient's knee pain problem
Could this exercise fix your knee pain? This patient of mine couldn't perform even a small single leg squat without severe pain in his left knee, and he couldn't figure out why. It's always worse going down than it is up. When I examined him, his left hip and ankle mobility were excellent, but when I tested his lateral hip stability, he struggled to even resist a small amount of force.
This meant his knee pain wasn't likely due to a lack of mobility. It was a problem in control over the mobility he did have. So the solution wasn't to simply make his glutes stronger with common lateral glute exercises. Instead, I gave him an exercise called the DNS Star.
It challenges your core, hips, and pelvis to all work together to create stability while moving, factors that are essential for controlling your knee during a squat. Start in a side plank. Rotate your pelvis towards the floor, moving into hip internal rotation. Then slowly squat your hips down, pause for a second, and then return to the start while keeping your body under control.
We immediately retested his single leg squat, and this time— That's so much better.
0:20Assessing hip and ankle mobility vs. stability
0:30Performing the DNS Star exercise
0:50Retesting the single leg squat
Mentioned in this video
- Squat University
- Muscle and Motion
- Aaron Horschig
- DNS Star
- Single leg squat
- Lateral hip stability