Patellofemoral Syndrome is a classic injury that causes pain around your kneecap. It is also something that I myself am dealing with right now. Also known as “Runner’s Knee,” it’s usually a dull achy pain that is worse with going up and down stairs, running, jumping and squatting. It can also get cranky when you sit with your knees bent for a prolonged period of time such as watching a movie. It is very common and the cause can be multifactorial, so I am hoping that this post will give you a basic understanding of what may be going on with your knee.
Inside The Knee
First, let’s go over the anatomy of your knee shall we? Your knee is actually more than one joint! There is the big joint between your femur (thigh bone) and your tibia (shin bone), but there is also a joint between your femur and your patella (kneecap). In fact, your patella sits in a little groove at the base of the femur and when you bend or straighten your knee the patella glides up and down it’s little groove.
This is all fun and games until it starts to hurt. There are generally a few contributing factors for patellofemoral pain, I have listed a few of the more common culprits below:
Overuse: Activities that require high levels of repetitive stress on your joints are more likely to cause Patellofemoral Syndrome. All of that running and jumping can cause irritation underneath the kneecap as it rubs up and down over the femur.
Alignment Issues between your hips, knees and ankles: If your hip muscles are weak then your form can suffer. Have you ever done a squat and noticed that your knee kind of collapsed into the midline rather than staying aligned and straight? That is hard on your knee. People with that technique error have a higher incidence of Patellofemoral Syndrome. If you can’t control your knee when you are standing still you are most likely not in control when you are running or jumping or stepping off of a curb either. If you do something incorrectly for about 30-60 minutes straight & 3-5 times per week, that can result in a LOT of misdirected force.
Women are more prone than men to patellofemoral injury: It is speculated that this is because of wider hips (so the knees more naturally bias inwards). Strengthening your outer hip muscles (such as the gluteus medius) can help prevent or correct the inward collapse of your knee.
Muscle imbalances: There are four separate parts to your quadriceps (the big muscles on the front of your thigh). If the outer muscle is stronger than the inner muscle (which is often is) then the patella gets tugged toward the strong side. This also can cause it to track improperly in its little groove.
Inappropriate footwear: If you overpronate or have flat feet you could likely benefit from a shoe that has cushion and support rather than a minimalist shoe.
Being overweight: When you are going down stairs your knee experiences three times your body weight in forces and pressure. If you weigh 200lbs then each knee is taking 600lbs. The forces are even higher (4-5 times your body weight) when you squat to tie a shoelace or pick something up off of the floor.
An injury: Falling on your knee or dislocating a kneecap can increase chances of patellofemoral pain.
What Can I Do About It?
Because patellofemoral pain is multifactorial, there is generally not one simple answer that will give you a quick fix (bummer, I know). For this reason, I strongly suggest making an appointment with a physiotherapist so they can properly assess your personal situation. Treatment will involve the following:
Addressing your risk factors and will likely include strengthening your quads and your hips
Suggestions for altering your current training program will also be made
Tape may also be helpful to alleviate painful symptoms temporarily
FAQ: Is biking instead of running a good option?
The is by far the most common question I get from runners with knee pain who are looking to maintain their cardio and activity levels while they rehab their knees.
My answer? Maybe, but not necessarily.
I know that is an extremely vague answer but here is why. Although biking has less overall force going through your knees compared to running, it is still a repetitive activity that involves a lot of knee bending and straightening. If your seat is too low or too far forward this can make your knee bend too much with each revolution, putting unnecessary excess force through the knee. Also, having the gear of your bike too high can cause increased force through the knee. For some people it is a viable alternative to running while others find that biking is still too aggravating. It really needs to be assessed on a case-by-case basis.
For those who are curious this is how I ended up with my sore knees…
I popped both of my children (40lbs each) into a bike trailer and proceeded to ride for 20+km while hauling them behind me. It was my first time riding my bike in several months, my seat was too low, the load was too high, and the volume was too much. Should I have known better? Probably. Was it a fun day? Absolutely. Will I rehab my knees back up to running the distances I want and get back to squats with resistance? Of course! Will it take some time and patience……. Also yes.
Good luck running out there everybody!
As always, if you find yourself battling a running injury of any kind please call us at 778-630-8800 to make an appointment with one of our skilled physiotherapists so we can get you back on track as soon as possible.