Ask A Physio: If My Knee Hurts, Why Are You Looking At My Hip?

As physios, we see bodies differently than most people. This is a good thing - you want your body specialist to see beyond the obvious! But what is often obvious to us is a mystery to others.

You may have heard one of us talking about the “kinetic chain”, a concept borrowed from the engineering world and repackaged for health care. The basic idea is the movement in one joint will create and affect the movement of the next joint, and so on. If your pain is in your elbow, we would be doing you a disservice if we didn’t also look at your wrist, shoulder, neck and upper back as well.

The kinetic chain is a big reason why one-size-fits-all approaches don’t work.

We don’t tell you to simply Google your symptoms and treat yourself. One person’s treatment approach for sciatica will be completely different than the next. My grandma’s elbow pain often has a completely different cause than my daughter’s elbow pain, even if they are in the same spot. Looking at the body as a whole is imperative to proper treatment.

A Case Study in Kinetic Chains: Runner’s Knee

A great example of this is someone with runner’s knee, also known as patellofemoral syndrome (PFPS). To understand how PFPS develops, an understanding of knee biomechanics is crucial.

The patella (aka the kneecap) rides in a groove on the femur at the front of the knee and is critical for proper knee movement. The patella acts as the attachment point for ALL your quads - think of how much muscle that is! To stretch out your leg, your quads first contract and pull on the patella. The force is transmitted through the patellar tendon (or ligament, depending on who you read) and pulls on the tibia, the main bone of your lower leg. Without the patella, the amount of force required for the quads to unbend the knee is simply too great. The patella acts as a fulcrum, giving the quads a mechanical advantage.

Need a visual? Check out this fantastic video:

Muscle imbalance is one of the main causes of PFPS. The patella is held in its position by a fine balance of muscle and connective tissue. Muscles that attach to the patella directly - we’re talking about the quads here - are obviously a main focus. But there’s many more muscles to consider. Consider these two examples:

1. One cause of PFPS is tight calf muscles. The gastrocnemius, one of the calf muscles, attaches at the back of the leg above the knee and can have a great effect on knee function. When these muscles are too tight, people tend to walk more in a pronated foot position (see photo on the right), increasing the forces at the back of the knee and adding to the compression and irritation of tissues around the patella.

2. The IT band runs the length of the thigh on the outside of the leg and attaches to the outside of the patella. The gluteus maximus, the large muscle in your buttock that controls hip extension, attaches into the top of the IT band. If the glutes aren’t doing their job, you can experience knee pain even if it isn’t the source of the problem.

We don’t expect you to know the ins and outs of this - that’s our job! When you come in for a little rehab, don’t be surprised when we start checking out your other joints - you may be surprised by what we find.

If you need to see a physiotherapist, give us a call at (778) 630-8800, email us or book online. We would love to work with you!

Ask A Physio: How Can I Get Rid Of My Sciatica?

We’ve all heard of sciatica - that awful, weird pain that runs down the back of your leg. It’s often fairly vague pain and hard to pinpoint but there’s no mistaking its presence.

Lately, we have seen a serious uptick in clients complaining of sciatica and its good friend, low back pain. So, what is sciatica and what exactly can we do about it?

What Is Sciatica?

Sciatica refers to in irritation of the sciatic nerve which runs down the back side of your leg and innervates the hamstrings and all the muscles below the knee. The sciatic nerve is HUGE - about the width of your thumb! It passes through, around and beside some major structures including the spine as well as the glutes and piriformis in the buttocks.

The classic profile of someone with sciatic-related pain can include:

• Pain in the low back that radiates down the back of the leg, described as anything from dull and achy to sharp, burning or electrical

• Tingling and/or numbness in the lower spine, buttock, back of thigh, calf and/or foot

• Increase in pain with certain postures - often sitting with the legs stretched out or driving a car is terrible, but standing, walking or lying down eases pain

• Electrical and/or shock-like pain down the back of the leg

• In extreme cases, weakness of the muscles in the lower leg and hamstrings

Usually, the pain is just on one side as it’s only one nerve that’s affected, not both at the same time.

How Do We Treat It?

At the root of it, sciatica is a symptom, not a diagnosis. When the sciatic nerve is pressed on or irritated by other structures, sciatic pain is the result.

Before addressing the sciatica itself, we need to figure out what’s causing the pressure on the sciatic nerve in the first place. The likely candidates include:

1. Herniated Disc - the nerve roots that exit the spinal cord to form the sciatic nerve can be compressed by a herniated disc, leading to sciatic pain. This is the most common cause of sciatica.

2. Spinal Stenosis - literally meaning “narrowing”, stenosis occurs when the tunnel of bone that allows the nerve roots to escape shrink, often by bone spurs or a loss of disc height.

3. Arthritis - When arthritis hits the spine, it usually leads to bone spurs around the exiting nerve roots, similar to stenosis.

4. Pelvic and/or SI Joint Hypermobilities - most of the muscles that lie over and around the sciatic nerve are attached to some point of the pelvis. When the pelvis is moving more than it should, these muscles often tighten down to try and stabilize the pelvis. When this occurs, an unintended consequence is pressure on the sciatic nerve. Pregnant women with sciatica: this is likely you!

5. Piriformis tightness - this deep muscle lies right over the sciatic nerve. If it’s too tight, it can squeeze the sciatic nerve.

The treatment approach is defined by the source of the sciatic nerve irritation. Is the problem at the spine? Is it a muscle imbalance or spasm causing the problem?

We see a lot of “one size fits all” fixes for sciatica online. These often don’t work because the root problem isn’t identified and addressed. If your sciatic pain isn’t going away, your best bet is to be assessed by your medical practitioner and figure out what’s driving your sciatica.

My Sciatica Is Gone! How Can I Prevent It From Coming Back?

There are loads of ways to keep sciatica at bay! The top tips:

• Stay active - Look at all those causes of sciatica listed above. All of them benefit from exercise - strengthening, stretching, MOVING. In fact, one of the biggest risk factors for sciatica is prolonged sitting. So if you don’t want sciatica, move more!

• Maintain a healthy weight - a normal weight keeps your spine healthier with less disc pressure and a lower chance of degenerative changes, both of which contribute to sciatic pain.

• Sit properly - I’m talking feet on the floor, bum at the back of your chair with a lumbar support properly. Not sure what that looks like? Check out our blog on proper ergonomics.

• Strengthen your core - A strong core means a supported spine and pelvis, preventing sciatic nerve compression.

• Use good body mechanics - Considering a disc injury is the leading cause of sciatica, protect those discs! Lift with your legs and try to not twist as you lift a heavy load. Hold those heavy loads close to your body and find a friend if it’s really heavy.

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If you’re dealing with low back or sciatic pain, give us a call at (778) 630-8800 or book online.