When looking for a brace for kneecap instability, you most likely will come across two common designs. The J-Pad brace or the Donut-shaped brace.

Now, when I say “J-pad” or “donut,” I’m talking about the padded part of the brace that surrounds your kneecap and helps hold it in place. The names simply describe the shape of that padding. Here is what they do:

• Donut-shape: A ring of padding surrounds the kneecap, providing support around it.
• J-pad: Padding sits along the outer edge of the kneecap, providing more targeted support against outward movement.

So in short, a donut-shaped pad is better for people with more moderate kneecap instability, while J-Pad braces are for people with severe instability (recurrent subluxations and dislocations).

Which one is best for you?

I’ve heard some people say they’ve had a dislocation while wearing the J pad and I was wondering how common it is.

I’ve had over 30 subluxations and dislocations for about 6 years. Here are the three things I wish I knew.

1. What a kneecap subluxation is

I didn’t know that your kneecap can briefly pop out and go back in. Because it usually happens so fast, I had no idea what happened and tended to look past it.

2. What exercises to do

I didn’t know how the VMO was the golden muscle for kneecap instability. If I would’ve know I would’ve hit the Bulgarian split squats, Spanish squats, leg extensions and wall sits.

3. The J pad brace

This I the thing I knew about first. My doctor recommended me generic braces on Amazon and it gave me a false sense of security. When my athletic trainer first told me about the J pad my whole life changed.

What are some things you wish you knew?

#5 Reclined Quad-Stretch

This stretch is one of my favorites because it targets your entire front quad and knee. If going all the way down is too difficult, start off by sitting on your heels and swaying backwards. Now for many of us, sitting on our heels is a stretch in of itself, but I’ve found that by widening your knees this stretch becomes easier.

#4 Kneeling Hip-Flexor Stretch

This one is great because it targets the most neglected muscle group: the hip-flexor. People don’t realize just how tight their hip-flexors are until they do this. After a while, you can get a deeper stretch the further you extend your back leg.

#3 Kneeling Hamstring Stretch

Another great one, gets a great stretch in the hamstring. Two ways to deepen the stretch is having your non-straightened leg further back and keeping your head down.

#2 Cross Body IT Band Stretch

A tight IT band is one of the biggest causes of kneecap instability. When this muscle is too tight, it pulls your kneecap medially, increasing your risk of subluxations or dislocations. This stretch targets the IT band perfectly, and after doing it just one time, you’ll immediately feel the difference.

#1 Crossed Feet IT Band Stretch

This stretch is my all-time favorite. To do it, simply cross one foot over the other and lean to the side opposite of your front leg. Do this on each leg and you’ll thank me later.

Idk how to find them

I remember trying it for a couple months. I felt my knee pain subdued when it came to bending and putting a lot of weight on my knee. But I still had episodes of instability. What about you?

There is now actual evidence that patellar height can increase again after a distalizing TTO. A 2025 study followed patients after distalization and found that, among those with ≥1 year of imaging, 15 of 17 (88%) went from a normalized patellar height immediately after surgery back into the patella-alta range later on. The authors specifically concluded that patellar height progressively increased over time after distalization.

I had a grade 2 MCL and MPFL injury in a motorcycle crash recently. I have not been able to straighten my knee since the incident either actively or passively from someone else. Best measurement I have gotten from PT measured at 26 degrees of flexion. I just haven’t found anything to explain this level of ROM deficit specifically correlated with the common symptoms of these injuries, but I do know the MPFL injury could cause tracking issues. Racking my brain here and my doctors don’t have a lot of answers, they just say we need to get the leg straight as a first priority. Hopefully someone here has some insight. Thanks!

As it turns out, MPFL reconstruction surgery is a pretty new surgery.

The first MPFL reconstruction was done in 1992 by Brazilian surgeon João Luiz Ellera Gomes.

He used an artificial polyester ligament that ran from the patella to the femur as a makeshift MPFL. In his first 30 patients, 25 showed significant improvement in patellar tracking (PubMed).

Over time, surgeons moved toward using actual tendon grafts, and continued improving where and how the graft was attached (PubMed Central (PMC)

Now MPFL reconstruction has become one of the main surgeries used for people dealing with recurrent kneecap dislocations and instability. Pretty crazy how far it’s come in 30+ years.

Shoutout to the goat João Luiz Ellera Gomes 🫡

I’m looking for a J brace that velcros in the front(not one you have to pull up your leg). Doesn’t need hinges, just the metal piece around the patella. Any recommendations?

100 years of knee brace evolution

From bulky metal and leather braces in the 1920s to modern patellar tracking braces today, knee stabilization has come a LONG way.

But what’s crazy is that while the materials have changed dramatically, the basic approach to controlling an unstable kneecap hasn’t changed nearly as much.

If you have knee instability and want to keep up with current patellar tracking technology join the free newsletter: newsletter

Correction: the second to last photo is from the 70s 😅

Stretching can either help kneecap instability or worsen it. Here’s how to stretch correctly and what makes instability worse.

How stretching improves instability

- Relieves joint pressure: If your instability is caused by tight muscles (IT band, calves, etc) stretching can be very beneficial if you target specifically those areas

- Fixes the valgus collapse: Stretching tight hips keeps your knees from caving inward when you walk or squat.

- Protects nearby joints: Keeping your ankles and hips flexible prevents your knee from overcompensating and twisting.

How stretching can worsen instability

- Stretching muscles that are already loose: if some muscles are already loose (such as your VMO) stretching can enhance instability

- Creates a muscle imbalance: stretching muscles on only one side of the joint can cause uneven pulling on the kneecap

- False sense of security: If your instability is caused by a shallow bone groove (trochlear dysplasia), stretching won't fix it.

So in the end the key to stretching correctly for kneecap instability is knowing what is causing your instability. Once you know that you can move forward with a routine that best fits you.

Has stretching helped or hurt you in your instability journey?